CN111615029A - Wireless headset reset circuit, wireless headset and reset method - Google Patents

Abstract

The invention discloses a wireless earphone reset circuit, a wireless earphone and a reset method, and relates to the technical field of wireless earphones. The wireless earphone includes a communication wire and a ground wire, and the wireless earphone reset circuit includes: a detection circuit, the detection circuit is connected to the communication wire and the ground wire, and the detection circuit is used to detect the communication wire and the ground wire. the ground wire is connected; a reset circuit, the reset circuit is connected with the detection circuit and the ground wire, and the reset circuit is used to output a reset signal; a wireless communication chip, the wireless communication chip is connected with the reset circuit, The ground wire is connected, and the wireless communication chip is used for resetting according to the reset signal. Since the reset process uses hardware circuits, it is more reliable than the software reset in the prior art.

Description

Wireless headset reset circuit, wireless headset and reset method

technical field

The invention relates to the technical field of wireless earphones, and in particular, to a wireless earphone reset circuit, a wireless earphone and a reset method.

Background technique

At present, one way to reset the wireless headset is to send a command through the communication line of the wireless headset to reset the software. However, when the headset is busy or the software is faulty, the software cannot be reset, and the reliability is not high.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention provides a wireless earphone reset circuit, which can realize hardware reset and is more reliable.

The present invention also provides a wireless earphone.

The present invention also provides a method for resetting the wireless earphone.

In a first aspect, an embodiment of the present invention provides a wireless headset reset circuit for resetting a wireless headset, the wireless headset includes a communication wire and a ground wire, and the wireless headset reset circuit includes:

a detection circuit, which is used for connecting with the communication wire and the ground wire, and the detection circuit is used for detecting the connection between the communication wire and the ground wire;

a reset circuit, the reset circuit is connected to the detection circuit and the ground wire, and the reset circuit is used for outputting a reset signal;

A wireless communication chip, the wireless communication chip is connected to the reset circuit and the ground wire, and the wireless communication chip is used for resetting the wireless earphone according to the reset signal.

The wireless earphone reset circuit of the embodiment of the present invention has at least the following beneficial effects:

The detection circuit detects whether the communication wire and the ground wire of the earphone are connected. If connected, the reset circuit outputs a reset signal to the wireless communication chip, and the wireless communication chip is reset according to the reset signal to realize the earphone reset. Since the reset process uses hardware circuits, it is more reliable than the software reset in the prior art.

According to the wireless earphone reset circuit according to other embodiments of the present invention, the communication wire includes a communication wire contact, and the ground wire includes a ground wire contact;

If the communication wire contact and the ground wire contact are short-circuited, the communication wire and the ground wire are connected.

According to the wireless earphone reset circuit according to other embodiments of the present invention, the detection circuit includes a first switch, a second switch and a first capacitor, and the first switch is respectively connected with the communication line, the second switch, the The first capacitor is connected, and the first capacitor is connected to the reset circuit.

According to the reset circuit of the wireless earphone according to other embodiments of the present invention, the reset circuit includes a third switch, and the first capacitor is connected to the third switch.

According to the wireless earphone reset circuit according to other embodiments of the present invention, the first switch includes a first MOS transistor, the second switch includes a second MOS transistor, and the third switch includes a third MOS transistor.

According to the wireless earphone reset circuit according to other embodiments of the present invention, the gate of the first MOS transistor is connected to the communication line and the gate of the second MOS transistor, respectively, and the source of the first MOS transistor is connected connected to the power input terminal, the drain of the first MOS transistor is respectively connected to the drain of the second MOS transistor and one end of the first capacitor, the source of the second MOS transistor is grounded, and the first MOS transistor is connected to the ground. The other end of the capacitor is grounded, one end of the first capacitor is connected to the gate of the third MOS transistor, and the drain of the third MOS transistor is respectively connected to the power input end and the wireless communication chip, so the The source of the third MOS transistor is grounded.

According to the wireless headset reset circuit according to other embodiments of the present invention, the wireless communication chip is a Bluetooth chip.

In a second aspect, an embodiment of the present invention provides a wireless headset, including a power module and the wireless headset reset circuit of any of the above embodiments, the power module is connected to the detection circuit, the reset circuit, the wireless headset The communication chip is connected, and the power module is used for supplying power to the detection circuit, the reset circuit and the wireless communication chip.

According to the wireless earphones of other embodiments of the present invention, the wireless earphones are Bluetooth earphones.

In a third aspect, an embodiment of the present invention provides a method for resetting a wireless headset for resetting a wireless headset, where the wireless headset includes a communication wire and a ground wire, and the method for resetting a wireless headset includes:

Detecting whether the communication wire and the ground wire are connected;

If connected, output reset signal;

The wireless headset is reset according to the reset signal.

Description of drawings

Fig. 1 is the module block diagram of the wireless earphone reset circuit in the embodiment of the present invention;

2 is a circuit schematic diagram of a wireless earphone reset circuit in an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for resetting a wireless headset according to an embodiment of the present invention.

Reference numerals: detection circuit 100 ; reset circuit 200 ; wireless communication chip 300 .

Detailed ways

The concept of the present invention and the technical effects produced will be clearly and completely described below with reference to the embodiments, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts are all within the scope of The scope of protection of the present invention.

In the description of the present invention, if the orientation description is involved, for example, the orientation or positional relationship indicated by "upper", "lower", "front", "rear", "left", "right", etc. is based on the drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention . If a feature is referred to as "set", "fixed", "connected", "mounted" on another feature, it can be directly set, fixed, connected to the other feature, or indirectly set, fixed, connected , mounted on another feature.

In the description of the embodiments of the present invention, if "several" is involved, it means more than one; if it involves "plurality", it means more than two; ", should be understood as not including this number, if it involves "above", "below", "within", it should be understood as including this number. If it refers to "first" and "second", it should be understood to be used to distinguish technical features, but not to indicate or imply relative importance, or to imply indicate the number of indicated technical features or to imply indicate the indicated The sequence of technical features.

As shown in FIG. 1 , it is a block diagram of a reset circuit of a wireless headset in an embodiment of the present invention. The wireless headset reset circuit is used to reset the wireless headset, the wireless headset includes a communication wire and a ground wire, and the wireless headset reset circuit includes:

The detection circuit 100, the detection circuit 100 is used for connecting with the communication wire and the ground wire, and the detection circuit 100 is used for detecting the connection between the communication wire and the ground wire;

a reset circuit 200, the reset circuit 200 is connected to the detection circuit 100 and the ground wire, and the reset circuit 200 is used for outputting a reset signal;

The wireless communication chip 300 is connected to the reset circuit 200 and the ground wire, and the wireless communication chip 300 is used to reset the wireless earphone according to the reset signal.

In this embodiment, the detection circuit 100 detects whether the communication wire of the earphone and the ground wire are connected. If connected, the reset circuit 200 outputs a reset signal to the wireless communication chip 300, and the wireless communication chip 300 is reset according to the reset signal to realize the earphone reset. Since the reset process uses hardware circuits, it is more reliable than the software reset in the prior art.

Further, the communication wire of the wireless headset includes a communication wire contact, and the ground wire includes a ground wire contact. If the communication wire contact and the ground wire contact are shorted, the communication wire and the ground wire are connected.

The communication line contact and the ground contact are the exposed contacts of the wireless headset. When the wireless headset is not placed in the headset box, the communication line contact and the ground contact can be short-circuited through a wire to connect the communication line. wire and ground. After the communication line and the ground line are connected, the reset circuit 200 can output a reset signal to reset.

The headset box of the wireless headset is provided with a corresponding communication line contact and a ground contact. When the wireless headset is put into the headset box, the communication line contact of the wireless headset and the communication line contact of the headset box touch and connect, and the wireless headset is connected. The ground contact of the earphone and the ground contact of the earphone box are touching and connected. A switch (which can be a MOS switch tube or a relay or other type of switch) is set between the communication line contact and the ground contact of the earphone box. When the wireless earphone is put into the earphone box, the earphone box sends a signal to control the above earphone box. The switch of the wireless headset is turned on, and the connection between the communication line and the ground line of the wireless headset can be realized. After the communication line and the ground line are connected, the reset circuit 200 can output a reset signal to reset. In the prior art, the wireless earphone is reset by putting it into the earphone box by power-on reset through the power cord of the earphone. However, after each reset, using the wireless earphone again requires reconnecting the mobile phone, resulting in poor user experience. However, the reset circuit of this embodiment can solve this problem well and improve user experience.

Further, the detection circuit 100 includes a first switch, a second switch and a first capacitor, the first switch is respectively connected to the communication line, the second switch and the first capacitor, and the first capacitor is connected to the reset circuit 200 .

Further, the reset circuit 200 includes a third switch, and the first capacitor is connected to the third switch.

In some embodiments, the first switch includes a first MOS transistor, the second switch includes a second MOS transistor, and the third switch includes a third MOS transistor. It can be understood that the first switch, the second switch and the third switch can also use other types of switches, such as relays and the like.

As shown in FIG. 2 , it is a circuit schematic diagram of a reset circuit of a wireless earphone in an embodiment of the present invention. TX/RX is a signal sending/receiving end, the signal sending/receiving end TX/RX is connected with the first MOS transistor Q1 through a communication line, and the first resistor R1 is a pull-up resistor of the communication line. BT_RESET is a reset signal output terminal, which is connected to the wireless communication chip 300 .

The detection circuit 100 includes a first MOS transistor Q1, a second MOS transistor Q2, a third resistor R3 and a first capacitor C1, and the reset circuit 200 includes a second resistor R2 and a third MOS transistor Q3. The gate of the first MOS transistor Q1 is connected to the communication line and the gate of the second MOS transistor Q2 respectively, the source of the first MOS transistor Q1 is connected to the power input terminal VCC, and the drain of the first MOS transistor Q1 passes through the third resistor R3 They are respectively connected to the drain of the second MOS transistor Q2 and one end of the first capacitor C1, the source of the second MOS transistor Q2 is grounded, the other end of the first capacitor C1 is grounded, and one end of the first capacitor C1 is connected to the third MOS transistor Q3 The gate of the third MOS transistor Q3 is connected to the power supply input terminal VCC through the second resistor R2, and the drain of the third MOS transistor Q3 is also connected to the wireless communication chip 300 through the reset signal output terminal BT_RESET. The source of tube Q3 is grounded. The above grounding refers to the connection with the ground wire of the wireless headset.

As shown in Figure 2, the communication line and the ground line are connected through a switch S1. Referring to the above, when the wireless earphone is not put into the earphone box, the switch S1 can be a wire, and the communication wire and the ground wire can be connected by short-circuiting the communication wire contact and the ground wire contact through the wire; When the wireless earphone is put into the earphone box, the switch S1 can be a MOS switch tube or a relay or other type of switch. When the wireless earphone is put into the earphone box, the earphone box sends a signal to control the switch S1 to conduct, and the communication of the wireless earphone can be realized. wire and ground connection.

The specific principles are as follows:

When the communication wire of the wireless headset is connected to the ground wire, it is equivalent to the switch S1 being turned on, and the voltage of the communication wire is 0V. The difference between the gate voltage and the source voltage of the first MOS transistor Q1 is the voltage value of the power input terminal VCC, the first MOS transistor Q1 is turned on, and the first capacitor C1 is charged through the third resistor R3, and the gate of the second MOS transistor Q2 The difference between the electrode voltage and the source voltage is 0V, and the second MOS transistor Q2 is turned off. When the voltage on the first capacitor C1 rises to the turn-on voltage of the third MOS transistor Q3, the third MOS transistor Q3 is turned on, the reset signal output terminal BT_RESET is at a low level, and the wireless communication chip 300 is reset.

When the communication line and the ground wire of the wireless headset are not connected or the wireless headset has no communication, the voltage of the communication line remains at a high level. The difference between the gate voltage and the source voltage of the first MOS transistor Q1 is 0V, and the first MOS transistor Q1 is turned off. The difference between the gate voltage and the source voltage of the second MOS transistor Q2 is the voltage value of the power input terminal VCC, the second MOS transistor Q2 is turned on, the gate voltage of the third MOS transistor Q3 is pulled to the ground, and the third MOS transistor Q3 The difference between the gate voltage and the source voltage is 0V, and the third MOS transistor Q3 is turned off. The reset signal output terminal BT_RESET is at a high level, and the wireless communication chip 300 is not reset.

When the wireless earphone communicates with the earphone box, the voltage of the communication line is in an alternating state of 0V and a high level, and the gate voltages of the first MOS transistor Q1 and the second MOS transistor Q2 also alternately change. However, due to the charging delay factor of the third resistor R3 and the first capacitor C1, the voltage of the first capacitor C1 rises slowly, and discharges quickly through the second MOS transistor Q2, so that the voltage on the first capacitor C1 cannot reach the third MOS transistor. The turn-on voltage of Q3, the third MOS transistor Q3 is turned off, the reset signal output terminal BT_RESET remains at a high level, and the wireless communication chip 300 is not reset to avoid the normal use of the wireless headset due to reset during wireless communication.

In this embodiment, the wireless communication chip 300 is a Bluetooth chip, and may also be other chips capable of realizing wireless communication, such as an NFC chip, to realize the wireless communication function of the wireless headset.

Further, this embodiment also provides a wireless headset, including a power supply module and the wireless headset reset circuit in any of the foregoing embodiments. The power module is connected to the detection circuit 100 , the reset circuit 200 and the wireless communication chip 300 respectively. The power module supplies power to the detection circuit 100 , the reset circuit 200 and the wireless communication chip 300 through the power input terminal VCC.

In this embodiment, the wireless communication chip 300 is a Bluetooth chip, and correspondingly, the wireless earphone is a Bluetooth earphone.

Further, this embodiment also provides a method for resetting a wireless earphone, which is used for resetting the wireless earphone, and the wireless earphone includes a communication wire and a ground wire. As shown in Figure 3, the method for resetting the wireless headset includes:

S1. Detect whether the communication line and the ground line are connected, and if so, perform step S2; otherwise, the process ends;

S2, output reset signal;

S3. Reset the wireless headset according to the reset signal.

In this embodiment, the earphone is reset by detecting whether the communication wire of the earphone and the ground wire are connected. For the specific process of the reset method, please refer to the above description of the reset circuit, which will not be repeated here.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the technical field without departing from the purpose of the present invention. Various changes. Furthermore, the embodiments of the present invention and features in the embodiments may be combined with each other without conflict.

Claims (10)

1. a wireless earphone reset circuit, for resetting a wireless earphone, the wireless earphone comprises a communication wire and a ground wire, it is characterized in that, the wireless earphone reset circuit comprises: a detection circuit, which is used for connecting with the communication wire and the ground wire, and the detection circuit is used for detecting the connection between the communication wire and the ground wire; a reset circuit, the reset circuit is connected to the detection circuit and the ground wire, and the reset circuit is used for outputting a reset signal; A wireless communication chip, the wireless communication chip is connected to the reset circuit and the ground wire, and the wireless communication chip is used for resetting the wireless earphone according to the reset signal. 2. The wireless earphone reset circuit according to claim 1, wherein the communication wire comprises a communication wire contact, and the ground wire comprises a ground wire contact; If the communication wire contact and the ground wire contact are short-circuited, the communication wire and the ground wire are connected. 3 . The wireless earphone reset circuit according to claim 1 , wherein the detection circuit comprises a first switch, a second switch and a first capacitor, and the first switch is respectively connected with the communication line, the first switch and the first capacitor. 4 . The second switch is connected to the first capacitor, and the first capacitor is connected to the reset circuit. 4 . The wireless earphone reset circuit according to claim 3 , wherein the reset circuit comprises a third switch, and the first capacitor is connected to the third switch. 5 . 5. The wireless earphone reset circuit according to claim 4, wherein the first switch comprises a first MOS transistor, the second switch comprises a second MOS transistor, and the third switch comprises a third MOS transistor . 6 . The wireless earphone reset circuit according to claim 5 , wherein the gate of the first MOS transistor is connected to the communication line and the gate of the second MOS transistor respectively, and the first MOS transistor is connected to the gate of the first MOS transistor. The source of the tube is connected to the power input terminal, the drain of the first MOS tube is respectively connected to the drain of the second MOS tube and one end of the first capacitor, and the source of the second MOS tube is grounded, The other end of the first capacitor is grounded, and one end of the first capacitor is connected to the gate of the third MOS transistor, and the drain of the third MOS transistor is respectively connected to the power input terminal and the wireless communication terminal. The chip is connected, and the source of the third MOS transistor is grounded. 7 . The wireless earphone reset circuit according to claim 1 , wherein the wireless communication chip is a Bluetooth chip. 8 . 8. A wireless earphone, characterized in that it comprises a power supply module and the wireless earphone reset circuit according to any one of claims 1 to 7, wherein the power supply module is respectively connected with the detection circuit, the reset circuit, the The wireless communication chip is connected, and the power module is used for supplying power to the detection circuit, the reset circuit and the wireless communication chip. 9. The wireless earphone according to claim 8, wherein the wireless earphone is a Bluetooth earphone. 10. A method for resetting a wireless earphone for resetting a wireless earphone, the wireless earphone comprising a communication wire and a ground wire, wherein the method for resetting the wireless earphone comprises: Detecting whether the communication wire and the ground wire are connected; If connected, output reset signal; The wireless headset is reset according to the reset signal.

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