CN107567271A - Electrostatic protection devices, radio frequency circuits and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses an electrostatic protection device, a radio frequency circuit and electronic equipment, wherein the electrostatic protection device comprises a front-end interface, an electrostatic protection circuit and a back-end circuit; the electrostatic protection circuit is positioned between the front-end interface and the back-end circuit, one end of the electrostatic protection circuit is connected with the front-end interface, and the other end of the electrostatic protection circuit is connected with the back-end circuit; the electrostatic protection circuit is formed by connecting an electrostatic discharge circuit and a filter circuit and is used for discharging electrostatic current transmitted by the front-end interface; the filter circuit is a type filter circuit or an inverse type filter circuit. The scheme can increase the electrostatic discharge capacity of the electronic equipment, reduce the damage and interference of static electricity to the back-end circuit and provide effective electrostatic protection for the electronic equipment.

Description

Electrostatic protection devices, radio frequency circuits and electronic equipment

technical field

The present application relates to the field of terminal technology, in particular to an electrostatic protection device, a radio frequency circuit and electronic equipment.

Background technique

At present, during the use of electronic devices such as mobile phones, laptops, and tablets,

Electrostatic discharge (Electro Static Discharge, ESD) is a very common natural phenomenon in life. When different materials and materials come into contact with each other, a certain amount of charge may accumulate on the surface. When encountering other objects, it may generate an electrostatic discharge of up to ten thousand volts. Voltage. Electronic devices can be damaged by this electromagnetic energy. With the widespread application of microelectronic components, more attention has been paid to ESD issues.

At present, electronic devices such as mobile phones, laptops, and tablet computers are very sophisticated electronic devices. For example, mobile phones are becoming smaller and thinner, and the integration of electronic components inside is getting higher and higher. During the use of electronic equipment, electrostatic discharge will damage or interfere with some circuits in the electronic equipment, such as radio frequency circuits, and affect the normal operation of the electronic equipment.

Contents of the invention

Embodiments of the present application provide an electrostatic protection device, a radio frequency circuit, and electronic equipment, which can provide effective electrostatic protection for electronic equipment.

In the first aspect, the embodiment of the present application provides an electrostatic protection device, including: a front-end interface, an electrostatic protection circuit, and a back-end circuit;

The electrostatic protection circuit is located between the front-end interface and the back-end circuit, one end of the electrostatic protection circuit is connected to the front-end interface, and the other end is connected to the back-end circuit;

The electrostatic protection circuit is composed of an electrostatic discharge circuit and a filter circuit connected to discharge the electrostatic current transmitted by the front-end interface; the filter circuit is a Γ-type filter circuit or an inverse Γ-type filter circuit.

In the second aspect, the embodiment of the present application also provides a radio frequency circuit, including a radio frequency transceiver, an electrostatic protection circuit, a radio frequency circuit switch chip, and an antenna, and the radio frequency transceiver, a radio frequency circuit switch chip, and an antenna are connected in sequence; The protection circuit is composed of an electrostatic discharge circuit and a filter circuit connected to discharge the electrostatic current transmitted by the front-end interface; the filter circuit is a Γ-type filter circuit or an inverse Γ-type filter circuit.

In the third aspect, the embodiment of the present application also provides an electronic device, including a screen, a housing, and an electrostatic protection device, the screen and the electrostatic protection device are installed inside the housing, and the electrostatic protection device is based on The electrostatic protection device provided in any one of the embodiments of the application.

In the embodiment of the present application, the electrostatic protection circuit formed by connecting an electrostatic discharge circuit and a filter circuit (such as a Γ-type filter circuit or an inverse Γ-type filter circuit) can be used to discharge static electricity, which can increase the electrostatic discharge capability of electronic equipment and reduce the The damage and interference of static electricity to the back-end circuit provides effective static protection for electronic equipment and improves the stability of electronic equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Fig. 2 is a schematic structural diagram of another electronic device provided by an embodiment of the present application.

FIG. 3 is a schematic structural diagram of another electronic device provided by an embodiment of the present application.

Fig. 4 is a schematic diagram of the first structure of the electrostatic protection device provided by the embodiment of the present application.

Fig. 5 is a schematic diagram of the second structure of the electrostatic protection device provided by the embodiment of the present application.

FIG. 6 is a schematic diagram of a third structure of an electrostatic protection device provided in an embodiment of the present application.

FIG. 7 is a schematic diagram of a fourth structure of the electrostatic protection device provided by the embodiment of the present application.

FIG. 8 is a schematic diagram of a fifth structure of the electrostatic protection device provided by the embodiment of the present application.

FIG. 9 is a schematic diagram of a sixth structure of an electrostatic protection device provided by an embodiment of the present application.

FIG. 10 is a schematic diagram of a seventh structure of an electrostatic protection device provided in an embodiment of the present application.

FIG. 11 is a schematic diagram of an eighth structure of the electrostatic protection device provided by the embodiment of the present application.

FIG. 12 is a schematic structural diagram of a Γ-type filter circuit provided by an embodiment of the present application.

FIG. 13 is another schematic structural diagram of the Γ-type filter circuit provided by the embodiment of the present application.

FIG. 14 is a schematic structural diagram of an inverse Γ-type filter circuit provided by an embodiment of the present application.

FIG. 15 is another structural schematic diagram of an inverse Γ-type filter circuit provided by an embodiment of the present application.

FIG. 16 is a schematic diagram of a ninth structure of an electrostatic protection device provided in an embodiment of the present application.

Fig. 17 is a schematic diagram of the tenth structure of the electrostatic protection device provided by the embodiment of the present application.

Fig. 18 is a schematic structural diagram of a radio frequency circuit provided by an embodiment of the present application.

FIG. 19 is another schematic structural diagram of a radio frequency circuit provided by an embodiment of the present application.

Fig. 20 is another schematic structural diagram of the electronic device provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

An embodiment of the present application provides an electronic device. The electronic device may be a smart phone, a tablet computer or the like. Referring to FIG. 1 , an electronic device 100 includes a cover plate 101 , a display screen 102 , a circuit board 103 and a casing 104 .

Wherein, the cover plate 101 is installed on the display screen 102 to cover the display screen 102 . The cover plate 101 may be a transparent glass cover plate. In some embodiments, the cover plate 101 may be a glass cover plate made of materials such as sapphire.

The display screen 102 is mounted on the casing 104 to form a display surface of the electronic device 100 . The display screen 102 may include a display area 102A, a non-display area 102B and a non-display area 102C. The display area 102A is used to display information such as images and texts. No information is displayed in the non-display area 102B. The bottom of the non-display area 102B may be provided with functional components such as a fingerprint module and a touch circuit. The bottom of the non-display area 102C may be provided with optical proximity sensors, front cameras, receivers and other components.

The circuit board 103 is installed inside the housing 104 . The circuit board 103 may be a main board of the electronic device 100 . Functional components such as a camera, an optical proximity sensor, and a processor may be integrated on the circuit board 103 . Meanwhile, the display screen 102 may be electrically connected to the circuit board 103 . For example, the position of the circuit board 103 corresponding to the non-display area 102C is integrated with a camera, an optical proximity sensor, and the like.

In some embodiments, a radio frequency (RF, Radio Frequency) circuit is disposed on the circuit board 103 . The radio frequency circuit can communicate with network equipment (eg, server, base station, etc.) or other electronic equipment (eg, smart phone, etc.) through a wireless network, so as to complete information sending and receiving between the network equipment or other electronic equipment.

In some embodiments, as shown in FIG. 2 , the electronic device further includes a rear camera 105 , a flash 106 and an antenna. Wherein, the camera 105 may be a single camera, such as a 16-megapixel wide-angle camera or a 20-megapixel telephoto camera. Through the camera 105, the electronic device can capture images. In some embodiments, the rear camera 105 can also be a dual camera, such as a wide-angle camera and a telephoto camera.

Wherein, the antenna may be connected to the radio frequency circuit on the circuit board 103 for sending and receiving radio frequency signals.

In some embodiments, as shown in FIG. 3 , the electronic device further includes: a card slot 108 for a SIM card, a screen lock button 109 and the like. The card slot 108 is used to place the SIM card, and is electrically connected to the circuit board 103 through the elastic piece in the card slot 108 ; the card slot 108 and the lock screen button 109 are arranged in the object 104 . The screen lock button 109 is used to lock and unlock the display screen 102 , for example, when the user presses the screen lock button 109 , the display screen 102 is locked and turned off.

In some embodiments, as shown in FIG. 4 , the electronic device further includes: a USB interface 110 , an audio interface 111 , a first volume adjustment key 112 , and a second volume adjustment key 113 .

In an embodiment, referring to FIG. 5 to FIG. 9, FIG. 5 is a schematic structural diagram of an electrostatic protection device 200 provided in an embodiment of the present application. The electrostatic protection device 200 includes: a front interface 201, an electrostatic protection circuit 202, and a rear terminal circuit 203.

Wherein, the electrostatic protection circuit 202 is located between the front-end interface 201 and the back-end circuit 202 , one end of the electrostatic protection circuit 202 is connected to the front-end interface 201 , and the other end is connected to the back-end circuit 203 .

The electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 and a filter circuit 2022 connected to discharge the electrostatic current transmitted by the front-end interface 201;

Wherein, the filter circuit 2022 may include a Γ-type filter circuit or an inverse Γ-type filter circuit.

Wherein, the front-end interface 201 is an interface device that introduces static electricity on an electronic device. For example, the front-end interface 201 may include: an antenna, a USB interface 110, an audio interface 111, a first volume adjustment key 112, a second volume adjustment key 113, and a card slot 108 shrapnel, lock screen key 109, camera 105 and so on.

The backend circuit 203 is a circuit that needs to be protected from static electricity, for example, it may include a radio frequency processing circuit, a display driving circuit, a fingerprint processing circuit, etc., and the backend circuit 203 may also include components that need to be protected from static electricity.

Wherein, the electrostatic discharge circuit 2021 is used to release or discharge the electrostatic current, and can also filter the interference signal generated by electrostatic coupling. The electrostatic discharge circuit 2021 may include: a transient diode (TransientVoltage Suppressor, TVS).

TVS is a high-efficiency protection device in the form of a diode. When the two poles of the TVS diode are impacted by reverse transient high energy, it can change the high impedance between its two poles to low impedance at a speed of 10 minus 12 seconds, absorbing surge power up to several thousand watts , so that the voltage between the two poles is clamped at a predetermined value, effectively protecting the precision components in the electronic circuit from being damaged by various surge pulses. In the embodiment of the present application, the characteristics of the extremely low impedance of the TVS tube under instantaneous high voltage can be used to discharge the electrostatic pulse current, so as to protect the back-end circuit from damage caused by instantaneous high current impact.

Wherein, the filter circuit 2022 may include a Γ-type filter circuit or an inverse Γ-type filter circuit.

The Γ-type filter circuit is a circuit in the shape of a "Γ" shape, which is used to discharge or discharge the electrostatic current, and can also filter the interference signal generated by electrostatic coupling. The Γ-shaped filter circuit may be a "Γ"-shaped circuit composed of multiple filter sub-circuits.

The reverse Γ-type filter circuit is a circuit with a reverse "Γ" shape, which is used to discharge or discharge electrostatic current, and can also filter interference signals generated by electrostatic coupling. The Γ-shaped filter circuit may be an inverse "Γ"-shaped circuit composed of multiple filter sub-circuits.

Wherein, the electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 and a filter circuit 2022 connected together. There may be various positional relationships between the static discharge circuit 2021 and the filter circuit 2022 , for example, the static discharge circuit 2021 is before the filter circuit 2022 , or the static discharge circuit 2021 is after the filter circuit 2022 .

In one embodiment, referring to FIG. 6, the electrostatic protection circuit 202 includes a circuit 2021 and a filter circuit 2022; wherein, the front-end interface 201 is connected to the electrostatic discharge circuit 2021, the electrostatic discharge circuit 202 is connected to the filter circuit 2022, and the filter circuit 2022 is connected to the filter circuit 2022. The backend circuit 203 is connected. In FIG. 6 , the electrostatic discharge circuit 2021 is connected before the filter circuit 2022 , one end of the electrostatic discharge circuit 2021 is connected to the front-end interface 201 , and the other end is connected to the filter circuit 2022 .

In one embodiment, referring to FIG. 7, the filter circuit 2022 includes a Γ-type filter circuit 20221: the electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 and a Γ-type filter circuit 20221 connected; wherein, the front-end interface 201 and the electrostatic discharge circuit 2021 connection, the electrostatic discharge circuit 202 is connected to the Γ-type filter circuit 20221, and the Γ-type filter circuit 20221 is connected to the back-end circuit 203. In FIG. 7 , the electrostatic discharge circuit 2021 is connected before the Γ-type filter circuit 20221 , one end of the electrostatic discharge circuit 2021 is connected to the front-end interface 201 , and the other end is connected to the Γ-type filter circuit 20221 .

The electrostatic discharge circuit 2021 is used to discharge the electrostatic current transmitted by the front-end interface 201 to obtain the remaining electrostatic current, and transmit the remaining electrostatic current to the Γ-type filter circuit 20221;

The Γ-type filter circuit 20221 is used to discharge the residual electrostatic current.

In addition, in one embodiment, the electrostatic discharge circuit 2021 and the Γ-type filter circuit 20221 are also used to filter the interference signal generated by electrostatic coupling, so as to prevent the interference signal from interfering with the back-end circuit 203 and affecting the performance of the back-end circuit 203. Function, improve the anti-interference ability and stability of electronic equipment.

In one embodiment, referring to FIG. 8, the filter circuit 2022 includes an anti-Γ-type filter circuit 20222: the electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 and an anti-Γ-type filter circuit 20222; wherein, the front-end interface 201 is connected to the electrostatic discharge The circuit 2021 is connected, the electrostatic discharge circuit 202 is connected to the reverse Γ-type filter circuit 20222, and the reverse Γ-type filter circuit 20222 is connected to the back-end circuit 203. In FIG. 8 , the electrostatic discharge circuit 2021 is connected before the inverse Γ-type filter circuit 20222 , one end of the electrostatic discharge circuit 2021 is connected to the front-end interface 201 , and the other end is connected to the inverse Γ-type filter circuit 20222 .

The electrostatic discharge circuit 2021 is used to discharge the electrostatic current transmitted by the front-end interface 201 to obtain the remaining electrostatic current, and transmit the remaining electrostatic current to the reverse Γ-type filter circuit 20222;

The reverse Γ-type filter circuit 20222 is used to discharge the residual electrostatic current.

In addition, in one embodiment, the electrostatic discharge circuit 2021 and the reverse Γ-type filter circuit 20222 are also used to filter the interference signal generated by electrostatic coupling, so as to prevent the interference signal from interfering with the back-end circuit 203 and affecting the back-end circuit 203 The function improves the anti-interference ability and stability of electronic equipment.

In one embodiment, referring to FIG. 9 , the electrostatic protection circuit 202 includes: an electrostatic discharge circuit 2021 and a filter circuit 2022; wherein, the front-end interface 201 is connected to the filter circuit 2022, and the filter circuit 2022 is connected to the electrostatic discharge circuit 2021. The circuit 2021 is connected to the back-end circuit 203 . In FIG. 9 , the filter circuit 2022 is connected before the electrostatic discharge circuit 2021 , one end of the filter circuit 2022 is connected to the front-end interface 201 , and the other end is connected to the electrostatic discharge circuit 2021 .

In one embodiment, referring to FIG. 10 , the filter circuit 2022 includes a Γ-type filter circuit 20221 : the electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 connected to a Γ-type filter circuit 20221 . Wherein, the front-end interface 201 is connected to the Γ-type filter circuit 20221 , the Γ-type filter circuit 20221 is connected to the static discharge circuit 2021 , and the static discharge circuit 2021 is connected to the back-end circuit 203 . In FIG. 10 , the Γ-type filter circuit 20221 is connected before the electrostatic discharge circuit 2021 , one end of the Γ-type filter circuit 20221 is connected to the front-end interface 201 , and the other end is connected to the electrostatic discharge circuit 2021 .

The Γ-type filter circuit 20221 is used to discharge the electrostatic current transmitted by the front-end interface 201 to obtain the remaining electrostatic current, and transmit the remaining electrostatic current to the electrostatic discharge circuit 2021;

The electrostatic discharge circuit 2021 is used to discharge the remaining electrostatic current.

In addition, in one embodiment, the electrostatic discharge circuit 2021 and the Γ-type filter circuit 20221 are also used to filter the interference signal generated by electrostatic coupling, so as to prevent the interference signal from interfering with the back-end circuit 203 and affecting the performance of the back-end circuit 203. Function, improve the anti-interference ability and stability of electronic equipment.

When the electrostatic discharge circuit 2021 is before the Γ-type filter circuit 20221, the electrostatic current can be quickly discharged through the electrostatic discharge circuit 2021 such as TVS under instantaneous high voltage, and then the remaining electrostatic current can be discharged again through the Γ-type filter circuit 20221 , can increase the discharge speed of the electrostatic current, and instantly discharge the amplified electrostatic current, and prevent the back-end circuit 203 from being damaged by a large current impact. In this way, the anti-static current impact capability is relatively strong.

When the Γ-type filter circuit 20221 is before the electrostatic discharge circuit 2021, the electrostatic current can be discharged through the Γ-type filter circuit 20221 and most of the interference signals generated by electrostatic coupling can be filtered, and then the remaining Redischarging the electrostatic current and re-filtering the interference signal generated by the electrostatic coupling can increase the discharge speed of the electrostatic current, and can quickly filter out the interference signal generated by the electrostatic coupling, and the anti-interference ability is strong.

In one embodiment, referring to FIG. 11 , the filter circuit 2022 includes an inverse Γ-type filter circuit 20222 : the electrostatic protection circuit 202 is composed of an electrostatic discharge circuit 2021 and an inverse Γ-type filter circuit 20222 . Wherein, the front-end interface 201 is connected to the reverse Γ-type filter circuit 20222 , the reverse Γ-type filter circuit 20222 is connected to the static discharge circuit 2021 , and the static discharge circuit 2021 is connected to the back-end circuit 203 . In FIG. 10 , the reverse Γ-type filter circuit 20222 is connected before the electrostatic discharge circuit 2021 , one end of the reverse Γ-type filter circuit 20222 is connected to the front-end interface 201 , and the other end is connected to the electrostatic discharge circuit 2021 .

The reverse Γ-type filter circuit 20222 is used to discharge the electrostatic current transmitted by the front-end interface 201 to obtain the remaining electrostatic current, and transmit the remaining electrostatic current to the electrostatic discharge circuit 2021;

The electrostatic discharge circuit 2021 is used to discharge the remaining electrostatic current.

In addition, in one embodiment, the electrostatic discharge circuit 2021 and the reverse Γ-type filter circuit 20222 are also used to filter the interference signal generated by electrostatic coupling, so as to prevent the interference signal from interfering with the back-end circuit 203 and affecting the back-end circuit 203 The function improves the anti-interference ability and stability of electronic equipment.

When the electrostatic discharge circuit 2021 is before the reverse Γ-type filter circuit 20222, the electrostatic discharge circuit 2021 such as TVS can be used to quickly discharge the electrostatic current under instantaneous high voltage, and then the remaining electrostatic current can be re-discharged by the reverse Γ-type filter circuit 20222 Discharging can increase the discharge speed of electrostatic current and instantaneously discharge the amplified electrostatic current, so as to prevent the back-end circuit 203 from being damaged by high current impact. In this way, the anti-static current impact capability is relatively strong.

When the reverse Γ-type filter circuit 20222 is before the electrostatic discharge circuit 2021, the electrostatic current can be discharged through the reverse Γ-type filter circuit 20222 and most of the interference signals generated by electrostatic coupling can be filtered, and then, through the electrostatic discharge circuit 2021 Redischarging the remaining electrostatic current and filtering the interference signal generated by electrostatic coupling can increase the discharge speed of electrostatic current, and can quickly filter out the interference signal generated by electrostatic coupling, with strong anti-interference ability.

In an embodiment, referring to FIG. 12 , the Γ-type filter circuit 20221 may include: a first filter sub-circuit 20221a, a second filter sub-circuit 20221b, an input terminal 20221c, and an output terminal 20221d.

One end of the first filter sub-circuit 20221a is connected to the input end 20221c, and the other end is connected to the output end 20221d;

The second filtering subcircuit 20221b is connected in parallel between the input terminal 20221c and the first filtering subcircuit 20221a, and one terminal of the second filtering subcircuit 20221b is respectively connected to the input terminal 20221c and the first filtering subcircuit 20221, and the second filtering subcircuit 20221b is separately connected One end is grounded.

In an embodiment, the filter sub-circuit may include a filter element, such as a capacitor or an inductor. That is, the first filtering sub-circuit 20221a includes a first inductor or a first capacitor, and the second filtering sub-circuit 20221b includes a second inductor or a second capacitor.

Referring to Figure 13, the Γ-type filter circuit 20221 includes an input terminal 20221c, an output terminal 20221d, an inductor (the first inductor 20221a'), and a capacitor (the second capacitor 20221b'), the first inductor 20221a' and the second capacitor 20221b 'in parallel. One end of the first inductor 20221a' is connected to the input end 20221c, and the other end is connected to the output end 20221d.

The second capacitor 20221b' is connected in parallel between the first inductor 2022a' and the input terminal 20221c. One end of the capacitor 20221b' is respectively connected to the first inductor 20221a' and the output terminal 20221d, and the other end is grounded.

In an embodiment, referring to FIG. 14 , the inverse Γ-type filter circuit 20222 may include: a first filter sub-circuit 20221a, a second filter sub-circuit 20221b, an input terminal 20221c, and an output terminal 20221d.

One end of the first filter sub-circuit 20221a is connected to the input end 20221c, and the other end is connected to the output end 20221d;

The second filtering subcircuit 20221b is connected in parallel between the output terminal 20221d and the first filtering subcircuit 20221a, and one terminal of the second filtering subcircuit 20221b is respectively connected to the output terminal 20221d and the first filtering subcircuit 20221a, and the second filtering subcircuit 20221b is separately connected One end is grounded.

In an embodiment, the filter sub-circuit may include a filter element, such as a capacitor or an inductor. That is, the first filtering sub-circuit 20221a includes a first inductor or a first capacitor, and the second filtering sub-circuit 20221b includes a second inductor or a second capacitor.

Referring to Figure 15, the inverse Γ-type filter circuit 20222 includes an input terminal 20221c, an output terminal 20221d, an inductor (the first inductor 20221a'), and a capacitor (the second capacitor 20221b'), the first inductor 20221a' and the second capacitor 20221b' in parallel. One end of the first inductor 20221a' is connected to the input end 20221c, and the other end is connected to the output end 20221d.

The second capacitor 20221b' is connected in parallel between the first inductor 2022a' and the output terminal 20221d. One end of the capacitor 20221b' is respectively connected to the first inductor 20221a' and the output terminal 20221d, and the other end is grounded.

In one embodiment, referring to FIG. 16 , the ESD protection device 200 includes: a front-end interface 201 , an ESD protection circuit 202 , and a back-end circuit 203 .

The electrostatic protection circuit 202 is located between the front-end interface 201 and the back-end circuit 202 , one end of the electrostatic protection circuit 202 is connected to the front-end interface 201 , and the other end is connected to the back-end circuit 203 .

The electrostatic protection circuit 202 includes: a transient diode 2021a and an inverse Γ-type filter circuit 20222 . The reverse Γ-type filter circuit 20222 may include: a first filter subcircuit 20221a, a second filter subcircuit 20221b, an input terminal 20221c and an output terminal 20221d; a first filter subcircuit 20221a, a second filter subcircuit 20221b, an input terminal 20221c and an output terminal The terminals 20221d are connected to each other to form an inverted Γ-shaped filter circuit.

The transient diode 2021 is connected in parallel between the front-end interface 201 and the inverse Γ-type filter circuit 20222. One end of the transient diode 2021 is respectively connected to the front-end interface 201 and the input end 20221c, and the other end of the transient diode 2021a is grounded.

Wherein, one end of the first filtering sub-circuit 20221a is connected to the input end 20221c, and the other end is connected to the output end 20221.

The second filter subcircuit 20221b is connected in parallel between the first filter subcircuit 20221a and the output terminal 20221d, one terminal of the second filter subcircuit 20221b is connected to the first filter subcircuit 20221a and the output terminal 20221d, and the other terminal of the second filter subcircuit 20221b is grounded .

When the front-end interface 201 has electrostatic current transmission, the transient diode 2021a will discharge the electrostatic current and filter the interference signal generated by electrostatic coupling, and the residual electrostatic current after the transient diode 2021a discharges will be transmitted to the feedback loop. type filter circuit 20222, and the reverse Γ-type filter circuit 20222 will discharge the residual electrostatic current and filter the interference signal generated by electrostatic coupling.

The electrostatic protection device 200 shown in FIG. 16 can discharge or discharge the electrostatic pulse current twice, and filter the interference signal generated by electrostatic coupling twice, which enhances the electrostatic discharge capability and interference signal suppression ability of electronic equipment. , can prevent the electrostatic current and interference signal from impacting and interfering with the back-end circuit 203, can provide effective electrostatic protection for the electronic equipment, and make the electronic equipment more stable. In addition, since the electrostatic protection device 200 shown in FIG. 16 is added with an anti-Γ-type filter circuit 20222, then a low-cost high-capacity transient diode can be used to avoid the use of a high-priced low-capacity transient diode to enhance static electricity. The discharge capacity greatly saves the cost.

In one embodiment, referring to FIG. 17 , the ESD protection device 200 includes: a front-end interface 201 , an ESD protection circuit 202 , and a back-end circuit 203 .

The electrostatic protection circuit 202 is located between the front-end interface 201 and the back-end circuit 202 , one end of the electrostatic protection circuit 202 is connected to the front-end interface 201 , and the other end is connected to the back-end circuit 203 .

The electrostatic protection circuit 202 includes: a transient diode 2021a and an inverse Γ-type filter circuit 20222 . The reverse Γ-type filter circuit 20222 may include: a first filter subcircuit 20221a, a second filter subcircuit 20221b, an input terminal 20221c and an output terminal 20221d; a first filter subcircuit 20221a, a second filter subcircuit 20221b, an input terminal 20221c and an output terminal The terminals 20221d are connected to each other to form an inverted Γ-shaped filter circuit.

Wherein, the front-end interface 201 is connected to the input terminal 20221c. One end of the first filter sub-circuit 20221a is connected to the input end 20221c, and the other end is connected to the output end 20221d.

The second filter subcircuit 20221b is connected in parallel between the first filter subcircuit 20221a and the output terminal 20221d, one terminal of the second filter subcircuit 20221b is connected to the first filter subcircuit 20221a and the output terminal 20221d, and the other terminal of the second filter subcircuit 20221b is grounded .

One end of the transient diode 2021a is respectively connected to the output terminal 20221d and the back-end circuit 203, and the other end of the transient diode 2021a is grounded.

When the front-end interface 201 has electrostatic current transmission, the anti-Γ-type filter circuit 20222 will discharge the electrostatic current and filter the interference signal generated by electrostatic coupling, and the remaining electrostatic current after the anti-Γ-type filter circuit 20222 discharges will It is transmitted to the transient diode 2021a, and the transient diode 2021a will discharge the residual electrostatic current and filter the interference signal generated by electrostatic coupling.

The electrostatic protection device 200 shown in FIG. 17 can discharge or discharge the electrostatic pulse current twice, and filter the interference signal generated by electrostatic coupling twice, which enhances the electrostatic discharge capability and interference signal suppression ability of electronic equipment. , can prevent the electrostatic current and interference signal from impacting and interfering with the back-end circuit 203, can provide effective electrostatic protection for the electronic equipment, and make the electronic equipment more stable. And because the anti-Γ-type filter circuit 20222 is firstly used to discharge the electrostatic current and improve the suppression ability of the electrostatically coupled interference signal.

In addition, since the electrostatic protection device 200 shown in FIG. 17 is added with an inverse Γ-type filter circuit 20222, then a low-cost high-capacity transient diode can be used to avoid the use of a high-priced low-capacity transient diode to enhance static electricity. The discharge capacity greatly saves the cost.

In one embodiment, the electrostatic protection circuit 202 can be composed of a Γ-type filter circuit 20221 connected, and the structure of the electrostatic protection device 200 can refer to Figure 16 and Figure 17, except that the reverse Γ-type filter circuit 20222 in Figure 16 and Figure 17 It is replaced by a Γ-type filter circuit 20221, which will not be repeated here.

In one embodiment, as shown in FIG. 18 , the radio frequency circuit 300 includes a radio frequency transceiver 31 , a power amplification unit 32 , a filter unit 33 , a radio frequency circuit switch chip 34 and an antenna 35 . Wherein, the power amplifying unit 33 , the filtering unit 33 , the radio frequency circuit switch chip 34 and the antenna 35 are connected in sequence. Wherein, the antenna 35 is a front-end interface; any circuit or unit among the radio frequency transceiver 31, the power amplification unit 32, the filter unit 33, and the radio frequency circuit switch chip 34 can be a back-end circuit.

The radio frequency transceiver 31 has a transmit port TX and a receive port RX. The transmitting port TX is used for transmitting radio frequency signals (uplink signals), and the receiving port RX is used for receiving radio frequency signals (downlink signals). The transmitting port TX of the radio frequency transceiver 31 is connected to the power amplifying unit 33 , and the receiving port RX is connected to the filtering unit 33 .

The power amplifying unit 33 is configured to amplify the uplink signal transmitted by the radio frequency transceiver 31 , and send the amplified uplink signal to the filter unit 33 .

The filtering unit 33 is configured to filter the uplink signal transmitted by the radio frequency transceiver 31 , and send the filtered uplink signal to the antenna 35 . The filtering unit 33 is also configured to filter the downlink signal received by the antenna 35 and send the filtered downlink signal to the radio frequency transceiver 31 .

The radio frequency circuit switch chip 34 is used for selectively connecting the communication frequency band between the radio frequency transceiver 31 and the antenna 35 . The detailed structure and function of the radio frequency circuit switch chip 34 will be described below.

The antenna 35 is used to transmit the uplink signal sent by the radio frequency transceiver 31 to the outside world, or receive the radio frequency signal from the outside world, and send the received downlink signal to the radio frequency transceiver 31 .

Wherein, the transient diode 36 is connected in parallel between the radio frequency switch chip 34 and the antenna 35, one end of the transient diode 36 is respectively connected to the antenna 35 and the Γ-type filter circuit 37, and the other end of the transient diode 36 is grounded.

The Γ-type filter circuit 37 includes: a first filter element 371 and a second filter element 372; the first filter element 371 and the second filter element 372 are connected to form a Γ-type filter circuit.

One end of the first filter element 371 is connected with the transient diode 36, and the other end is connected with the radio frequency circuit switch chip 34 and the second filter element 372 respectively; the second filter element 372 is connected in parallel between the first filter element 371 and the radio frequency circuit switch chip 34 , one end of the second filter element 372 is connected to the radio frequency switch chip 34 , and the other end is connected to the first filter element 371 .

In an embodiment, refer to FIG. 19 , which is a schematic structural diagram of a radio frequency circuit 200 . Wherein, the radio frequency transceiver 31 includes 9 radio frequency transmitting ports a1, a2, a3, a4, a5, a6, a7, a8, a9, and 9 radio frequency receiving ports b1, b2, b3, b4, b5, b6, b7, b8, b9.

Wherein, a1, a2, and a3 are high-frequency transmitting ports for transmitting high-frequency radio frequency signals (for example, radio frequency signals of frequency bands such as band7, band40, and band41). b1, b2, and b3 are high-frequency receiving ports for receiving high-frequency radio frequency signals. a4, a5, and a6 are intermediate frequency transmitting ports for transmitting intermediate frequency radio frequency signals (for example, radio frequency signals of frequency bands such as band1, band2, and band3). b4, b5, and b6 are intermediate frequency receiving ports for receiving intermediate frequency radio frequency signals. a7, a8, and a9 are low-frequency transmitting ports for transmitting low-frequency radio frequency signals (for example, radio frequency signals of frequency bands such as band8, band12, and band20). b7, b8, and b9 are low-frequency receiving ports for receiving low-frequency radio frequency signals.

It should be noted that, the above embodiment is only described by taking the high frequency port, the intermediate frequency port and the low frequency port of the radio frequency transceiver 31 respectively including 3 radio frequency transmitting ports and 3 radio frequency receiving ports as an example. In some other embodiments, the high-frequency port, the intermediate-frequency port, and the low-frequency port may respectively include other numbers of radio frequency transmitting ports and radio frequency receiving ports. It only needs to be satisfied that the numbers of radio frequency transmitting ports and radio frequency receiving ports included in the high frequency port, the intermediate frequency port and the low frequency port are the same and greater than one.

The power amplification unit 32 includes nine amplifiers 321 , 322 , 323 , 324 , 325 , 326 , 327 , 328 , and 329 . Wherein, the amplifiers 321, 322, 323, 324, 325, 326, 327, 328, 329 are respectively connected to the radio frequency transmission ports a1, a2, a3, a4, a5, a6, a7, a8, a9 of the radio frequency transceiver 31.

The filtering unit 33 includes nine duplexers 331 , 332 , 333 , 334 , 335 , 336 , 337 , 338 , and 339 . Wherein, duplexers 331 , 332 , 333 , 334 , 335 , 336 , 337 , 338 , and 339 are respectively connected to amplifiers 221 , 222 , 223 , 224 , 225 , 226 , 227 , 228 , and 229 . And, the duplexers 321, 322, 323, 324, 325, 326, 327, 328, 329 are respectively connected to the radio frequency receiving ports b1, b2, b3, b4, b5, b6, b7, b8, b9 of the radio frequency transceiver 31 .

The RF circuit switch chip 34 includes a first switch 341 , a second switch 342 , a third switch 343 , a switch assembly 246 , and a first combiner 344 and a second combiner 345 .

Wherein, the output terminals of the first switch 341 and the second switch 342 are connected to the switch component 346 . The output terminal of the third switch 343 is connected to the first input terminal of the second combiner 345 .

The first switch 341 , the second switch 342 and the third switch 343 are single-pole multiple-throw switches. For example, the first switch 341 includes three sub-input ports c1, c2, c3, the second switch 342 includes three sub-input ports c4, c5, c6, and the third switch 343 includes three sub-input ports c7, c8, c9. Wherein, the sub-input ports c1 , c2 , c3 , c4 , c5 , c6 , c7 , c8 , and c9 are respectively connected to duplexers 331 , 332 , 333 , 334 , 335 , 336 , 337 , 338 , and 339 .

The switch component 346 has three input terminals P1, P2, P3 and three output terminals Q1, Q2, Q3. Wherein, the input terminal P1 is connected to the output terminal of the switch 341 . The input terminal P2 is connected to the output terminal of the switch 342 . The input terminal P3 is connected to the output terminal of the first combiner 344 . The output terminal Q1 is connected to the first input terminal of the combiner 344 . The output terminal Q2 is connected to the second input terminal of the combiner 344 . The output terminal Q3 is connected to the second input terminal of the second combiner 345 .

Wherein, both the first combiner 344 and the second combiner 345 are dual-frequency combiners. An output terminal of the second combiner 345 is connected to the antenna 35 .

Wherein, the transient diode 36 is connected in parallel between the radio frequency switch chip 34 and the antenna 35, one end of the transient diode 36 is respectively connected to the antenna 35 and the Γ-type filter circuit 37, and the other end of the transient diode 36 is grounded.

The Γ-type filter circuit 37 includes: a first filter element 371 and a second filter element 372; the first filter element 371 and the second filter element 372 are connected to form a Γ-type filter circuit.

One end of the first filter element 371 is connected with the transient diode 36, and the other end is connected with the combiner 345 and the second filter element 372 in the radio frequency circuit switch chip 34 respectively; the second filter element 372 is connected in parallel between the first filter element 371 and the radio frequency circuit Between the switch chips 34 , one end of the second filter element 372 is connected to the radio frequency switch chip 34 , and the other end is connected to the first filter element 371 .

When the antenna 35 has electrostatic current transmission, the transient diode 36 will discharge the electrostatic current and filter the interference signal generated by electrostatic coupling, and the residual electrostatic current after the transient diode 36 discharges will be transmitted to the Γ-type filter Circuit 37, the Γ-type filter circuit 37 will discharge the residual electrostatic current and filter the interference signal generated by electrostatic coupling, thereby protecting the back-end circuit, that is, the radio frequency circuit switch chip 34, the radio frequency transceiver 31, the power amplification unit 32, the filter Unit 33.

The embodiment of the present application can discharge and suppress the electrostatic pulse current, enhance the static discharge and suppression ability of the electronic equipment, prevent the impact and interference of the electrostatic current on the radio frequency circuit, and provide effective electrostatic protection for the electronic equipment, so that Electronic equipment is more stable. The embodiment of the present application also provides an electronic device, including a screen, a housing, and an electrostatic protection device. The screen and the electrostatic protection device are installed inside the housing. The electrostatic protection device is the electrostatic protection device 200 provided in any one of the embodiments of the present application.

Referring to FIG. 20 , FIG. 20 is another schematic structural diagram of the electronic device 100 provided by the embodiment of the present application. The electronic device 100 includes an antenna device 10 , a memory 20 , a display unit 30 , a power supply 40 , a processor 50 and a sensor module 60 . Those skilled in the art can understand that the structure of the electronic device 100 shown in FIG. 20 does not limit the electronic device 100 . Electronic device 100 may include more or fewer components than shown, or combine certain components, or have a different arrangement of components.

Wherein, the antenna device 10 can communicate with a network device (for example, a server) or other electronic devices (for example, a smart phone) through a wireless network to complete information sending and receiving between the network device or other electronic devices. Wherein, the antenna device 10 may include the electrostatic protection device 200 provided in any one of the embodiments of the present application.

Memory 20 may be used to store applications and data. The application programs stored in the memory 20 include executable program codes. Applications can be composed of various functional modules. The processor 50 executes various functional applications and data processing by executing the application programs stored in the memory 20 .

The display unit 30 may be used to display information input to the electronic device 100 by a user or information provided to the user and various graphical user interfaces of the electronic device 100 . These graphical user interfaces can be composed of graphics, text, icons, videos and any combination thereof. The display unit 30 may include a display panel.

The power supply 40 is used to supply power to various components of the electronic device 100 . In some embodiments, the power supply 40 may be logically connected to the processor 50 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption through the power management system.

The processor 50 is the control center of the electronic device 100 . The processor 50 uses various interfaces and lines to connect various parts of the entire electronic device 100, and executes various functions and The data is processed so as to monitor the electronic device 100 as a whole.

The sensor module 60 is used to sense external signals, such as light signals, and the sensor 60 may include a light proximity sensor, an ambient light sensor, and the like.

In addition, the electronic device 100 may further include a camera module, a bluetooth module, etc., which will not be repeated here.

During specific implementation, each of the above modules may be implemented as an independent entity, or may be combined arbitrarily as the same or several entities. For the specific implementation of each of the above modules, please refer to the previous method embodiments, which will not be repeated here.

An electrostatic protection device, a radio frequency circuit, and an electronic device provided by the embodiment of the present application have been introduced in detail above, and its functional modules can be integrated into one processing chip, or each module can exist separately physically, or it can be two or two More than one module is integrated in one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. In this paper, specific examples are used to illustrate the principle and implementation of the application. The description of the above embodiments is only used to help understand the method and core idea of the application; meanwhile, for those skilled in the art, according to the application Thoughts, specific implementation methods and application ranges all have changes. In summary, the content of this specification should not be construed as limiting the application.

Claims (12)

1. A kind of 1. electrostatic protection apparatus, it is characterised in that including：Front end interface, electrostatic discharge protective circuit and back-end circuit；

   The electrostatic discharge protective circuit is between the front end interface and the back-end circuit, one end of the electrostatic discharge protective circuit It is connected with the front end interface, the other end is connected with the back-end circuit；

   The electrostatic discharge protective circuit is connected by static leakage circuit with filter circuit to be formed, for what is transmitted to the front end interface Electrostatic induced current is released；The filter circuit is Γ types filter circuit or anti-Γ types filter circuit.
2. 2. electrostatic protection apparatus as claimed in claim 1, it is characterised in that the front end interface and the static leakage circuit Connection, the static leakage circuit are connected with the filter circuit, and the filter circuit is connected with the back-end circuit；

   The static leakage circuit, the electrostatic induced current for being transmitted to the front end interface are released, and obtain residual statics electricity Stream, and the residual statics electric current is transferred to the filter circuit；

   The filter circuit, for being released to the residual statics electric current.
3. 3. electrostatic protection apparatus as claimed in claim 1, it is characterised in that the front end interface connects with the filter circuit Connect, the filter circuit is connected with the static leakage circuit, and the static leakage circuit is connected with the back-end circuit；

   The filter circuit, the electrostatic induced current for being transmitted to the front end interface are released, and obtain residual statics electric current, and The residual statics electric current is transferred to the static leakage circuit；

   The static leakage circuit, for being released to the residual statics electric current.
4. 4. electrostatic protection apparatus as claimed in claim 2 or claim 3, it is characterised in that the filtering frequency range of the filter circuit is not wrapped Working frequency range containing the back-end circuit.
5. 5. the electrostatic protection apparatus as described in claim any one of 1-3, it is characterised in that the Γ types filter circuit includes： Input, the first filtering sub-circuit, the second filtering sub-circuit and output end；

   Described first filtering sub-circuit one end connects the input, the other end connects the output end；

   The second filtering sub-circuit is connected in parallel between the output end and the first filtering sub-circuit, and second filter Marble circuit on one side is grounded with the input, the first filtering sub-circuit, the second filtering sub-circuit other end respectively.
6. 6. the electrostatic protection apparatus as described in claim any one of 1-3, it is characterised in that the anti-Γ types filter circuit bag Include：Input, the first filtering sub-circuit, the second filtering sub-circuit and output end；

   Described first filtering sub-circuit one end connects the input, the other end connects the output end；

   The second filtering sub-circuit is connected in parallel between the input and the first filtering sub-circuit, and second filter Marble circuit on one side is grounded with the input, the first filtering sub-circuit, the second filtering sub-circuit other end respectively.
7. 7. electrostatic protection apparatus as claimed in claim 5, it is characterised in that the first filtering sub-circuit includes the first inductance Or first electric capacity, the second filtering sub-circuit include the second inductance or the second electric capacity.
8. 8. the electrostatic protection apparatus as described in claim any one of 1-3, it is characterised in that the static leakage circuit includes wink State diode；One end ground connection of the transient diode, the other end are connected with the Γ types filter circuit.
9. 9. the electrostatic protection apparatus as described in claim any one of 1-3, it is characterised in that the back-end circuit is included at radio frequency Manage circuit.
10. A kind of 10. radio circuit, it is characterised in that including RF transceiver, electrostatic discharge protective circuit, radio frequency switching circuit chip with And antenna, the RF transceiver, radio frequency switching circuit chip and antenna are sequentially connected；The electrostatic discharge protective circuit is by electrostatic Leadage circuit connects composition with filter circuit, and the electrostatic induced current for being transmitted to the front end interface is released；The filtering Circuit is Γ types filter circuit or anti-Γ types filter circuit.
11. 11. radio circuit as claimed in claim 10, it is characterised in that the radio frequency switching circuit chip is opened including first Pass, second switch, the 3rd switch, the first combiner and the second combiner, the first switch, second switch, third switch High-frequency signal, intermediate-freuqncy signal, low frequency signal can be exported respectively；

    The first switch, second switch are alternative to connect first combiner, to realize high-frequency signal and intermediate-freuqncy signal Carrier aggregation；

    Alternative connection second combiner of the first switch, the 3rd switch, to realize high-frequency signal and low frequency signal Carrier aggregation；

    Alternative connection second combiner of the second switch, the 3rd switch, to realize intermediate-freuqncy signal and low frequency signal Carrier aggregation；

    The first switch, second switch are alternative to connect first combiner, and the 3rd switch, described first Combiner is alternative to connect second combiner, to realize high-frequency signal, intermediate-freuqncy signal, low frequency signal carrier aggregation.
12. 12. a kind of electronic equipment, it is characterised in that including screen, housing and electrostatic protection apparatus, the screen and described Electrostatic protection apparatus is arranged on the enclosure interior, and the electrostatic protection apparatus is quiet as described in claim any one of 1-9 Electric protector.