CN109496395A - A kind of circuit and electronic equipment - Google Patents
A kind of circuit and electronic equipment Download PDFInfo
- Publication number
- CN109496395A CN109496395A CN201880001713.6A CN201880001713A CN109496395A CN 109496395 A CN109496395 A CN 109496395A CN 201880001713 A CN201880001713 A CN 201880001713A CN 109496395 A CN109496395 A CN 109496395A
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- Prior art keywords
- circuit
- touch
- antenna
- inductance
- control key
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/9607—Capacitive touch switches
- H03K2217/960735—Capacitive touch switches characterised by circuit details
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Support Of Aerials (AREA)
Abstract
The invention relates to touch-control field, a kind of circuit and electronic equipment are disclosed.Wherein, circuit includes: antenna, touch chip and communication chip；The antenna forms detecting electrode, and the detecting electrode is electrically connected in the touch chip and the communication chip；When finger touches the antenna, the capacitance of the antenna changes, and the touch chip detects that the transmission data of the detecting electrode change, and the touch chip triggers the electronic equipment and executes instruction corresponding with touch control operation.Compared with prior art, the application can realize two functions of antenna and touch-control by antenna, effectively blend the function of touch-control and antenna, and the occupied small volume of circuit of the application design, touch control operation are more sensitive.
Description
Technical field
The invention relates to touch-control field, in particular to a kind of circuit and electronic equipment.
Background technique
In recent years, with the continuous development of the communication technology and science and technology be constantly progressive, the electronics such as earphone, wrist-watch, bracelet
Equipment has become essential using tool in people's daily life.Bluetooth headset, bluetooth especially with Bluetooth antenna
The electronic equipments such as wrist-watch, bluetooth bracelet, bring great convenience to people's lives.Current such as bluetooth headset, bluetooth hand
The electronic equipments volumes such as table, bluetooth bracelet small and easy to use radio connection and other equipment are communicated, it is answered
With more and more extensive.
But at least there are the following problems in the prior art: there are contradictions, such as bluetooth headset with functional diversities for miniaturization
There are the needs of the functions such as control volume, switching song, single key can not solve, but multiple keys but need bigger sky
Between, cause the volume of electronic equipment to become larger.And the battery that the diversification of function also needs volume bigger supports, and can also occupy more
Big space also can cause the volume of electronic equipment to become larger.And under the limited circumstances of space, if antenna is shared to obtain space bit
It sets the larger touch-control area that will lead to reduce, causes to detect insensitive.
Summary of the invention
The application embodiment is designed to provide a kind of circuit and electronic equipment, and antenna is detecting electrode, so that working as
User's finger can detect that the capacitance of antenna changes when touching antenna by touch chip, and triggering electronic equipment executes
Instruction corresponding with touch control operation.So that two functions of antenna and touch-control are realized by antenna, effectively by touch-control and day
The function of line blends, and the occupied small volume of circuit of the application design, touch control operation are more sensitive.
In order to solve the above technical problems, presently filed embodiment provides a kind of circuit, the circuit is applied to electronics
Equipment, the circuit include: antenna, touch chip and communication chip；The antenna is detecting electrode, the detecting electrode point
It is not electrically connected to the touch chip and the communication chip；When finger touches the antenna, the capacitance hair of the antenna
Changing, the touch chip detect the variation of the capacitance, and trigger the electronic equipment and execute and touch control operation phase
Corresponding instruction.
Presently filed embodiment additionally provides a kind of electronic equipment, including at least one Touch control key and foregoing circuit；Institute
One of Touch control key is stated to be formed by the antenna.
In terms of existing technologies, the antenna is formed the application embodiment by detecting electrode, detecting electrode difference
It is electrically connected to touch chip and communication chip.When finger touches antenna, the capacitance of antenna changes, touch chip detection
To the variation of capacitance, touch chip triggers electronic equipment and executes instruction corresponding with touch control operation.That is, working as user
The capacitance of antenna changes when finger touches antenna, since antenna and touch chip to be electrically connected, it is possible to pass through touching
Control chip detects that the capacitance of antenna changes, and it is corresponding with touch control operation that touch chip can trigger electronic equipment execution
Instruction.It is thus possible to realize two functions of antenna and touch-control simultaneously by antenna, i.e., while antenna realizes communication function
It can also realize the function of Touch control key, effectively blend the function of touch-control and antenna, and the circuit institute of the application design
The small volume of occupancy, touch control operation are more sensitive.
In addition, the length of the antenna is a quarter of the Antenna Operation frequency band signals wavelength.By the length of antenna
The a quarter for being designed as antenna operating wavelength can make antenna have better radianting capacity.
In addition, the circuit further includes high-pass filtering circuit；The high-pass filtering circuit is connected electrically in the detecting electrode
Between the communication chip.By this circuit design, low frequency signal when can be by touch control operation is filtered out, and is kept away simultaneously
Exempt from the impedance variations due to the radio circuit for including antenna and causes to generate biggish survey in the variation of above-mentioned detection capacitance
Measure error.
In addition, the high-pass filtering circuit includes third capacitor, the 4th capacitor and the first inductance；The third capacitor and institute
It states the 4th capacitor to be connected between the detecting electrode and the communication chip, wherein one end of first inductance is connected to institute
It states between third capacitor and the 4th capacitor, the other end is connected to the system ground for first inductance.By this circuit design, mention
A kind of physical circuit form of high-pass filtering circuit has been supplied, and can be designed to high-pass filtering circuit in actual design
High-pass filtering circuit can also be designed to microstrip filter circuit by lumped circuit.
In addition, the circuit further includes low-pass filter circuit；The low-pass filter circuit is connected electrically in the detecting electrode
Between the touch chip.Passing through this circuit design, it is possible to reduce antenna interferes touch control operation when emitting high-frequency signal,
The ghost effect of touch-control circuit composed by detecting electrode and touch chip is avoided to influence the receptivity of antenna simultaneously.
In addition, the low-pass filter circuit includes the second inductance, third inductance, the 5th capacitor；Second inductance and institute
It states third inductance to be connected between the detecting electrode and the touch chip, wherein one end of the 5th capacitor is connected to institute
It states between the second inductance and the third inductance, the other end is connected to the system ground for the 5th capacitor.By this circuit design, mention
A kind of physical circuit form of low-pass filter circuit has been supplied, and can be designed to low-pass filter circuit in actual design
High-pass filtering circuit can also be designed to microstrip filter circuit by lumped circuit.
In addition, the circuit further includes battery and the isolation circuit for by the battery and being systematically isolated, institute
Stating isolation circuit is lumped circuit or microstrip filter circuit.Since isolation circuit makes the cathode of battery and is systematically separated by
From so battery will not generate screen effect to the radiation of antenna, so as to so that the distance between battery and antenna are arranged
It is closer, reduce the volume of electronic equipment.
In addition, the isolation circuit is lumped circuit, including common mode choke；The common mode choke includes first
Common mode inductance and the second common mode inductance；A wherein termination battery cathode for first common mode inductance, the other end is connected to the system ground；Institute
A wherein termination anode for the second common mode inductance is stated, the other end is for connecing predeterminated voltage.Since the high frequency of aerial radiation is believed
It number can be isolated by common mode choke with being systematically carried out, will not be absorbed by system, it is possible to be mentioned by common mode choke
The radiance of high antenna.
In addition, the isolation circuit is lumped circuit, comprising: the first separation inductance, the second separation inductance and one
Separate capacitor；The first separation inductance, the separation capacitor, the second inductance of the separation be sequentially connected in series the battery just
Between pole, cathode, the connecting pin of the first separation inductance and the separation capacitor is for connecing predeterminated voltage, second separation
The connection terminating systems of inductance and the separation capacitor.The radiation of antenna can be influenced to avoid battery by this circuit design
Performance.
In addition, the isolation circuit is microstrip filter circuit, comprising: the first microstrip line, the second microstrip line and the 7th electricity
Hold；First microstrip line, the 7th capacitor, second microstrip line be sequentially connected in series the anode of the battery, cathode it
Between, the connection of first microstrip line and the 7th capacitor terminates predeterminated voltage, second microstrip line and the 7th electricity
The connection terminating systems of appearance.The concrete form of another isolation circuit can be provided by this circuit design, is facilitated
With the different designs demand in user's design process.
In addition, the Touch control key includes the first Touch control key, the second Touch control key and third Touch control key；The third Touch control key by
The antenna is formed, between first Touch control key and second Touch control key.Electronics may be implemented by this design
The functional diversities of equipment, and biggish space will not be occupied, it can contribute to the Miniaturization Design of electronic equipment.
In addition, the third touch controlled key is between first Touch control key and second Touch control key, described first
The outer contour shape that Touch control key, second Touch control key and the third touch-control key combination are formed is circle.It is set by this
Meter facilitates the shape for matching electronic equipment when the shape of electronic equipment is round so that the occupied space of antenna is more concentrated
Shape, and this design the space occupied is smaller.
In addition, first Touch control key, second Touch control key and the third Touch control key are arranged successively, described first
Touch control key and second Touch control key are rectangle, and the third Touch control key is snakelike.By this design so that working as electronic equipment
Shape be rectangle when, the shape of electronic equipment can be matched.
In addition, the electronic equipment is earphone, wrist-watch or bracelet, allow to improve the versatility of the application.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment.
Fig. 1 is the structural block diagram according to the application first embodiment circuit；
Fig. 2 is the outline structural diagram according to the application first embodiment antenna；
Fig. 3 is the structure chart according to the application second embodiment circuit；
Fig. 4 is the structure chart according to the application third embodiment supplemental functionality circuit；
Fig. 5 is the structure chart according to the application third embodiment isolation circuit；
Fig. 6 is another structure chart according to the application third embodiment isolation circuit；
Fig. 7 is the circuit structure schematic diagram according to the 5th embodiment electronic equipment of the application；
Fig. 8 is one of aspect graph according to the 5th embodiment electronic equipment of the application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with attached drawing to the application
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the application
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the application is related to a kind of circuit, and the circuit is applied to electronic equipment.As shown in Figure 1, institute
Stating circuit includes: antenna 11, touch chip 12 and communication chip 13.The antenna 11 is detecting electrode, the detecting electrode
It is electrically connected in the touch chip 12 and the communication chip 13.When finger touches the detecting electrode, the detection
The capacitance of electrode changes, and the touch chip 12 detects the variation of the capacitance, and triggers the electronic equipment and hold
Row instruction corresponding with touch control operation.
The application antenna 11 is formed by detecting electrode, and detecting electrode is electrically connected in touch chip 12 and communication chip
13.In finger touch detection electrode, the capacitance of detecting electrode changes, and touch chip 12 detects the change of capacitance
Change, and triggers electronic equipment and execute instruction corresponding with touch control operation.That is, the day when user's finger touches antenna 11
The capacitance of line 11 changes, since antenna 11 and touch chip 12 to be electrically connected, it is possible to be examined by touch chip 12
The capacitance for measuring antenna 11 changes, and touch chip 12 can trigger electronic equipment and execute finger corresponding with touch control operation
It enables.It is worth noting that the antenna 11 of the embodiment of the present application may be performed simultaneously communication function and touch function.Pass through antenna 11
Two functions of realizing antenna 11 and touch-control simultaneously, effectively blend the function of touch-control and antenna 11, and the application is set
The occupied small volume of the circuit of meter, touch control operation are more sensitive.
In actual application, the product detected for the capacitance to the detecting electrode is equipped in touch chip 12
Parallel circuit 14 and processing unit 121.Wherein, the detecting electrode is electrically connected to the input terminal of the integrating circuit 14, the product
The output end of parallel circuit 14 is electrically connected to processing unit 121.When finger touches the detecting electrode, the electricity of the detecting electrode
Capacity changes, and processing unit 121 detects that the voltage of 14 output end of integrating circuit changes, and triggers the electronics
Equipment executes corresponding with touch control operation instruction, to realize touch function, provides a kind of the specific of detection finger touch
Way of realization facilitates the feasibility for promoting the application.
For example, before finger touch detection electrode, detecting electrode and systematically between formed parasitic capacitance CKG,
Be exactly antenna 11 and systematically between formed parasitic capacitance CKG.At this point, the capacitance of detecting electrode is CKG.It touches and examines in finger
It surveys after electrode, forms first capacitor C between finger and detecting electrodeFK, that is, the first electricity is formed between finger and antenna 11
Hold CFK, finger and systematically between form the second capacitor CFG.At this point, the capacitance of detecting electrode is CKG、CFKAnd CFGIt is total
Capacitor.Due to CFKAnd CFGAfter series connection and CKGIt is in parallel.So the knots modification Δ C of capacitance is CFKAnd CFGTotal capacitance.
Δ C=CFK*CFG/(CFK+CFG)。
And the variable quantity of electricity is Δ Q=Δ C*UK.Wherein, UKIt default is beaten for circuit system 10 to what detecting electrode injected
Code voltage.
When electricity changes, the voltage of the output end of integrating circuit 14 can change, at this point, processing unit 121 can be with
The voltage for recognizing 14 output end of integrating circuit changes, and may thereby determine that finger touches antenna 11.
As shown in Fig. 2, the length of the antenna 11 is a quarter of the 11 working frequency range signal wavelength of antenna.By day
The Design of length of line 11 is that a quarter of 11 working frequency range signal wavelength of antenna can make antenna 11 have better radiation energy
Power.The antenna 11 of present embodiment can be designed as serpentine configuration.It is noted that antenna 11 is not limited to serpentine configuration,
As long as can guarantee that the length of antenna 11 is the arbitrary shape of a quarter of 11 working frequency range signal wavelength of antenna all in this Shen
Within protection scope please.It is illustrated so that antenna 11 is Bluetooth antenna as an example, Bluetooth band 2.4GHz, by the length of antenna 11
The a quarter that degree is designed as the frequency band signals wavelength has good radianting capacity.But the antenna 11 of the application is not limited to
Bluetooth antenna, for example antenna 11 can be designed as by Zigbee antenna according to actual design requirement (Zigbee is to be based on
The low-power consumption LAN protocol of IEEE802.15.4 standard) or WiFi antenna (WiFi is that a kind of permission electronic equipment is connected to one
The technology of a WLAN) etc. forms, no longer illustrate herein.
In addition, the circuit further includes high-pass filtering circuit 15.The high-pass filtering circuit 15 is connected electrically in the antenna
Between 11 and the communication chip 13.By this circuit design, low frequency signal can be filtered out (such as by UKIt is filtered
Except), while avoiding the impedance variations due to radio circuit (components such as including antenna 11) and leading to the change of above-mentioned detection capacitance
Biggish measurement error is generated when change.It is worth noting that the concrete form of high-pass filtering circuit 15 can be lumped circuit
It is also possible to microstrip filter circuit.
The circuit further includes low-pass filter circuit 16.The low-pass filter circuit 16 be connected electrically in the detecting electrode and
Between the touch chip 12.It can reduce interference of the high-frequency signal to touch detection by this circuit design, height herein
Frequency signal is the high-frequency signal that Bluetooth signal is injected in transmitting, while can influence antenna to avoid the ghost effect of touch-control circuit
11 receptivity can allow antenna 11 to work independently well.It is worth noting that the concrete form of low-pass filter circuit 16
It can be lumped circuit and be also possible to microstrip filter circuit.
When the circuit includes above-mentioned high-pass filtering circuit 15 and low-pass filter circuit 16 simultaneously, the branch of communication function is executed
It will not influence each other between road and the branch for executing touch function, therefore, communication and touch-control may be performed simultaneously by antenna 11
Two functions.
Compared with prior art, present embodiment allows when user's finger touches antenna 11 through touch chip 12
Detect that the capacitance of antenna 11 changes, triggering electronic equipment executes instruction corresponding with touch control operation.It is thus possible to
Two functions of realizing antenna 11 and touch-control simultaneously by antenna 11, effectively blend the function of touch-control and antenna 11, and
And the occupied small volume of circuit of the application design, touch control operation are more sensitive.
The second embodiment of the application is related to a kind of circuit, which is applied to electronic equipment.Present embodiment be
Be further improved on the basis of first embodiment, mainly the improvement is that: present embodiments provide for a kind of high passes
The concrete form of filter circuit, low-pass filter circuit and integrating circuit.
As shown in figure 3, the circuit further includes high-pass filtering circuit 15.The high-pass filtering circuit 15 is connected electrically in described
Between detecting electrode and the communication chip 13.By this circuit design, low frequency signal can be filtered out (such as by UK
Filtered out), while avoiding the impedance variations due to radio circuit and causing to generate when the variation of above-mentioned detection capacitance larger
Measurement error.Specifically, the high-pass filtering circuit includes two capacitors and an inductance, it is respectively: third capacitor C1, the
Four capacitor C2, the first inductance L1.Two capacitors are connected between the detecting electrode and the communication chip 13, first electricity
The wherein one end for feeling L1 connects between two capacitors, and the other end is connected to the system ground.That is third capacitor C1 and the 4th capacitor C2 series connection
Between the detecting electrode and the communication chip 13, the company of wherein one end connection of the first inductance L1 between two capacitors
End is connect, the other end is connected to the system ground by the first inductance L1.By this circuit design, a kind of the specific of high-pass filtering circuit is provided
Circuit form, and high-pass filtering circuit can be designed to lumped circuit in actual design or filter high pass
Wave circuit is designed to microstrip filter circuit.
The circuit further includes low-pass filter circuit 16.The low-pass filter circuit 16 be connected electrically in the detecting electrode and
Between the touch chip 12.It can reduce interference of the high-frequency signal to touch detection by this circuit design, height herein
Frequency signal is the high-frequency signal that Bluetooth signal is injected in transmitting, while can influence antenna to avoid the ghost effect of touch-control circuit
11 receptivity can allow antenna 11 to work independently well.It is worth noting that the concrete form of low-pass filter circuit 16
It can be lumped circuit and be also possible to microstrip filter circuit.Specifically, the low-pass filter circuit includes two inductance
With a capacitor, it is respectively: the second inductance L2, third inductance L3, the 5th capacitor C3.Two inductance are connected on the detecting electrode
Between the touch chip 12, wherein one end of the 5th capacitor C3 is connected between two inductance, and the other end is connected to the system ground.I.e.
Second inductance L2 and third inductance L3 are connected between the detecting electrode and the touch chip 12, and the 5th capacitor C3 is wherein
One end is connected to the connecting pin between described two inductance, and the other end is connected to the system ground by the 5th capacitor C3.It is set by this circuit
Meter, provides a kind of physical circuit form of low-pass filter circuit, and can be by low-pass filter circuit in actual design
It is designed to that high-pass filtering circuit can also be designed to microstrip filter circuit by lumped circuit.In addition, it should be noted that,
The capacitance of 5th capacitor C3 cannot be excessive, if the excessive load energy more than touch chip 12 of the capacitance of the 5th capacitor C3
Power causes touch chip 12 to cannot achieve touch function.
Compared with prior art, present embodiment includes simultaneously above-mentioned high-pass filtering circuit 15 and low-pass filter circuit 16,
High-pass filtering circuit 15 can filter out low frequency signal, while avoiding the impedance variations due to radio circuit and causing above-mentioned
Biggish measurement error is generated when detecting the variation of capacitance.And low-pass filter circuit 16 can reduce high-frequency signal to touch
The interference of detection, while the receptivity of antenna 11 can be influenced to avoid the ghost effect of touch-control circuit, it can allow day well
Line 11 works independently.Executing will not influence each other between the branch of communication function and the branch of execution touch function, therefore, pass through
Antenna 11 may be performed simultaneously two functions of communication and touch-control.
The third embodiment of the application is related to a kind of circuit, which is applied to electronic equipment.Present embodiment be
Be further improved on the basis of first embodiment, mainly the improvement is that: circuit further includes battery and is used to incite somebody to action
Battery and the isolation circuit being systematically isolated.Wherein, the isolation circuit can be lumped circuit or microstrip filter
Circuit.The concrete form of isolation circuit is briefly described below:
As shown in figure 4, the isolation circuit is lumped circuit, including common mode choke 18.The common mode choke
18 include the first common mode inductance and the second common mode inductance.A wherein termination battery cathode for first common mode inductance, the other end
Welding system ground GND.A wherein termination anode for second common mode inductance, another termination predeterminated voltage VBAT.Due to antenna
The high-frequency signals of 11 radiation can be isolated by common mode choke with being systematically carried out, and will not be absorbed by system, it is possible to lead to
Common mode choke is crossed to realize the high-frequency signal on antenna and be isolated between system.Specifically, due to common mode choke
18 common-mode rejection ratio is very big, and the high-frequency signal that antenna 11 radiates will not pass through the negative couplings of common mode choke 18 and battery
To on systematically, the high-frequency signal that antenna 11 will not be made to radiate is absorbed by circuit system, but the energy of high-frequency signal is allowed to radiate
It goes out.So the radiance of antenna 11 can be improved by common mode choke 18.
As shown in figure 5, the isolation circuit is lumped circuit, comprising: the first separation inductance L_Battery, second
Separate an inductance L_GND and separation capacitor C_filter.First separation the inductance L_Battery, the separation capacitor C_
Filter, the second separation inductance L_GND are sequentially connected in series between the anode, cathode of the battery, the first separation electricity
The connection for feeling the L_Battery and separation capacitor C_filter terminates predeterminated voltage V-Battery, the second separation inductance
The connection terminating systems of L_GND and the separation capacitor C_filter.It can be influenced by this circuit design to avoid battery
The radiance of antenna.
As shown in fig. 6, the isolation circuit is microstrip filter circuit, comprising: the first microstrip line W1, the second microstrip line W2
With the 7th capacitor C7.The first microstrip line W1, the 7th capacitor C7, the second microstrip line W2 are sequentially connected in series in the electricity
Between the anode in pond, cathode.The connection of the first microstrip line W1 and the 7th capacitor C7 terminate predeterminated voltage VBAT, described
The connection terminating systems of second microstrip line W2 and the 7th capacitor C7 ground GND.Wherein, the first microstrip line W1 and described
Two microstrip line W2 are serpentine configuration, and length is identical.
Specifically, the equivalent input impedance of isolation circuit is Z when isolation circuit is formed using microstrip filterin。
Wherein Z0、ZLThe respectively impedance of the first microstrip line W1 and the second microstrip line W2.Micro-strip
Signal wavelength in lineWhen the length d of antenna is designed as a quarter i.e. λ/4 d=of working frequency range signal wavelength
When, tan (β d)=∞.The simplification of a formula of equivalent input impedance at this time are as follows:Due to CKGIt is very big, in radio circuit
Impedance is equivalent to ZL=0, such Zin=∞, therefore can be isolated by foregoing circuit design by battery and systematically.
Compared with prior art, present embodiment is made the cathode of battery and is systematically isolated due to isolation circuit, so
Battery will not generate screen effect to the radiation of antenna, so as to so that the distance between battery and antenna are arranged closer,
Reduce the volume of electronic equipment.
The 4th embodiment of the application is related to a kind of electronic equipment.The electronic equipment includes at least one Touch control key and
One, second or third embodiment circuit, one of described Touch control key formed by the antenna.
It is noted that the electronic equipment of present embodiment can be, but not limited to as earphone, wrist-watch or bracelet, so that can
To improve the versatility of the application.Earphone can be bluetooth headset if the antenna in circuit is Bluetooth antenna, and wrist-watch can be with
For Bluetooth watch, bracelet can be bluetooth bracelet.
Compared with prior art, the electronic equipment of present embodiment can realize the two of antenna and touch-control by antenna simultaneously
A function.
It is not difficult to find that present embodiment is apparatus embodiments corresponding with the first, second or third embodiment, this reality
The mode of applying can work in coordination implementation with the first, second or third embodiment.It is mentioned in first, second or third embodiment
Relevant technical details are still effective in the present embodiment, and in order to reduce repetition, which is not described herein again.Correspondingly, this embodiment party
The relevant technical details mentioned in formula are also applicable in the first, second or third embodiment.
The 5th embodiment of the application is related to a kind of electronic equipment.Present embodiment is on the basis of the 4th embodiment
On be further improved, mainly the improvement is that: present embodiment remove include the 4th embodiment is formed by the antenna
Touch control key outside, further include other Touch control keys.
If the Touch control key of Fig. 7, electronic equipment include the first Touch control key 62 and the second Touch control key 63 and third Touch control key 61,
The third Touch control key 61 is formed by above-mentioned antenna.The functional diversities of electronic equipment may be implemented by this design, and
Biggish space will not be occupied, can contribute to the Miniaturization Design of electronic equipment.The third touch controlled key 61 is located at described
Between first Touch control key 62 and second Touch control key 63, first Touch control key 62, second Touch control key 63 and described
The outer profile that the combination of third Touch control key 61 is formed is circle.By this design so that the occupied space of antenna is more concentrated,
Facilitate the shape of matching electronic equipment when the shape of electronic equipment is round, and this design the space occupied is smaller.
As shown in figure 8, first Touch control key 62, second Touch control key 63 and the third Touch control key 61 are arranged successively, it is described
First Touch control key 62 and second Touch control key 63 are rectangle, the third Touch control key 61 be it is snakelike, when the shape of electronic equipment
To facilitate to match the shape of electronic equipment when rectangle.
It is noted that the electronic equipment of present embodiment can be, but not limited to as earphone, wrist-watch or bracelet, so that can
To improve the versatility of the application.Earphone can be bluetooth headset if the antenna in circuit is Bluetooth antenna, and wrist-watch can be with
For Bluetooth watch, bracelet can be bluetooth bracelet.
Compared with prior art, present embodiment can be such that the occupied space of antenna more concentrates, and can be adapted to
The electronic equipment of different shapes.
It is not difficult to find that present embodiment is apparatus embodiments corresponding with the first, second or third embodiment, this reality
The mode of applying can work in coordination implementation with the first, second or third embodiment.It is mentioned in first, second or third embodiment
Relevant technical details are still effective in the present embodiment, and in order to reduce repetition, which is not described herein again.Correspondingly, this embodiment party
The relevant technical details mentioned in formula are also applicable in the first, second or third embodiment.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the application,
And in practical applications, can to it, various changes can be made in the form and details, without departing from spirit and scope.
Claims (16)
1. a kind of circuit, which is characterized in that the circuit is applied to electronic equipment, and the circuit includes:
Antenna, touch chip and communication chip；
The antenna is detecting electrode, and the detecting electrode is electrically connected in the touch chip and the communication chip；
When finger touches the detecting electrode, the capacitance of the detecting electrode changes, and the touch chip detects institute
The variation of capacitance is stated, and triggers the electronic equipment and executes instruction corresponding with touch control operation.
2. circuit according to claim 1, which is characterized in that the length of the antenna is the Antenna Operation frequency band signals
The a quarter of wavelength.
3. circuit according to claim 1, which is characterized in that the circuit further includes high-pass filtering circuit；
The high-pass filtering circuit is connected electrically between the detecting electrode and the communication chip.
4. circuit according to claim 3, which is characterized in that the high-pass filtering circuit includes third capacitor, the 4th electricity
Hold and the first inductance；
The third capacitor and the 4th capacitor are connected between the detecting electrode and the communication chip, first electricity
Wherein one end of sense is connected between the third capacitor and the 4th capacitor, another terminating systems of first inductance
Ground.
5. circuit according to claim 1, which is characterized in that the circuit further includes low-pass filter circuit；
The low-pass filter circuit is connected electrically between the detecting electrode and the touch chip.
6. circuit according to claim 5, which is characterized in that the low-pass filter circuit includes the second inductance, third electricity
Sense, the 5th capacitor；
Second inductance and the third inductance are connected between the detecting electrode and the touch chip, the 5th electricity
The wherein one end held is connected between second inductance and the third inductance, another terminating systems of the 5th capacitor
Ground.
7. circuit according to claim 1-6, which is characterized in that the circuit further includes battery and is used to incite somebody to action
The battery and the isolation circuit being systematically isolated, the isolation circuit are lumped circuit or microstrip filter circuit.
8. circuit according to claim 7, which is characterized in that the isolation circuit is lumped circuit, including common mode
Choke coil；
The common mode choke includes the first common mode inductance and the second common mode inductance；
A wherein termination battery cathode for first common mode inductance, the other end is connected to the system ground；
A wherein termination anode for second common mode inductance, another termination predeterminated voltage.
9. circuit according to claim 7, which is characterized in that the isolation circuit is lumped circuit, comprising: first
Separate inductance, the second separation inductance and a separation capacitor；
The first separation inductance, the separation capacitor, the second separation inductance are sequentially connected in series in the positive, negative of the battery
Between pole, the connection of the first separation inductance and the separation capacitor terminates predeterminated voltage, the second separation inductance and institute
With stating the connection terminating systems of separation capacitor.
10. circuit according to claim 7, which is characterized in that the isolation circuit is microstrip filter circuit, comprising:
First microstrip line, the second microstrip line and the 7th capacitor；
First microstrip line, the 7th capacitor, second microstrip line be sequentially connected in series the anode of the battery, cathode it
Between, the connection of first microstrip line and the 7th capacitor terminates predeterminated voltage, second microstrip line and the 7th electricity
The connection terminating systems of appearance.
11. circuit according to claim 10, which is characterized in that first microstrip line and second microstrip line are
Serpentine configuration, length are identical.
12. a kind of electronic equipment, which is characterized in that including at least one Touch control key and as described in any one of claim 1-11
Circuit；
One of described Touch control key is formed by the antenna.
13. electronic equipment according to claim 12, which is characterized in that the Touch control key includes the first Touch control key, second
Touch control key and third Touch control key；The third Touch control key is formed by the antenna.
14. electronic equipment according to claim 13, which is characterized in that the third touch controlled key is located at first touching
Between control key and second Touch control key, first Touch control key, second Touch control key and the third touch-control key combination
The outer contour shape of formation is circle.
15. electronic equipment according to claim 13, which is characterized in that first Touch control key, second Touch control key
And the third Touch control key is arranged successively, first Touch control key and second Touch control key are rectangle, the third touch-control
Key is snakelike.
16. electronic equipment according to claim 12, which is characterized in that the electronic equipment is earphone, wrist-watch or bracelet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/108447 WO2020062077A1 (en) | 2018-09-28 | 2018-09-28 | Circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109496395A true CN109496395A (en) | 2019-03-19 |
Family
ID=65713848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880001713.6A Pending CN109496395A (en) | 2018-09-28 | 2018-09-28 | A kind of circuit and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109496395A (en) |
| WO (1) | WO2020062077A1 (en) |
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| CN111541009A (en) * | 2020-05-27 | 2020-08-14 | 华勤通讯技术有限公司 | Antenna circuit, circuit board assembly and wireless Bluetooth device |
| CN111610880A (en) * | 2020-05-20 | 2020-09-01 | 维沃移动通信有限公司 | Display device and electronic equipment |
| CN112468913A (en) * | 2019-09-06 | 2021-03-09 | 华为技术有限公司 | Wearing detection device |
| CN112738679A (en) * | 2020-12-24 | 2021-04-30 | Oppo广东移动通信有限公司 | Signal receiving and transmitting device, electronic equipment, wearable equipment and wireless earphone |
| CN113437514A (en) * | 2021-06-25 | 2021-09-24 | 歌尔科技有限公司 | Antenna device and portable electronic device |
| CN114826313A (en) * | 2021-01-11 | 2022-07-29 | 炬芯科技股份有限公司 | Radio frequency circuit, touch detection method of radio frequency circuit and wearable device |
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Also Published As
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| WO2020062077A1 (en) | 2020-04-02 |
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Application publication date: 20190319 |