CN209072694U - A kind of TWS bluetooth headset reset control circuit - Google Patents
A kind of TWS bluetooth headset reset control circuit Download PDFInfo
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- CN209072694U CN209072694U CN201822105390.5U CN201822105390U CN209072694U CN 209072694 U CN209072694 U CN 209072694U CN 201822105390 U CN201822105390 U CN 201822105390U CN 209072694 U CN209072694 U CN 209072694U
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- control circuit
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Abstract
The utility model relates to a kind of TWS bluetooth headset reset control circuits, control the TWS bluetooth headset for charging box and reset, TWS bluetooth headset includes Bluetooth circuit and comparison circuit；Charging box includes voltage tunable road and control circuit, the input terminal on voltage tunable road is connected with the power input of the charging box, control circuit is used to detect the working condition of TWS bluetooth headset, and adjusts voltage tunable road according to working state control and export to the voltage of the input terminal of comparison circuit；The output end of comparison circuit is connected with the reset signal end for controlling the reset of TWS bluetooth headset of Bluetooth circuit；TWS bluetooth headset is controlled when control circuit detects TWS bluetooth headset non-normal working to reset.It realizes and earphone is not resetted when earphone works normally and earphone is resetted in earphone non-normal working, raising earphone reset is intelligent, promotes user experience.
Description
Technical field
The utility model belongs to wireless headset technical field, and in particular to a kind of TWS bluetooth headset reset control circuit.
Background technique
The realization of real wireless stereo (True Wireless Stereo, abbreviation TWS) technology is based on chip technology
Development technically refers to that mobile phone is connected by bluetooth wireless mode from sound by connection main sound box, then by main sound box
Case realizes that real bluetooth left and right acoustic channels wirelessly separate use.TWS Technology application has just expedited the emergence of TWS indigo plant to bluetooth earphone field
Tooth earphone.TWS bluetooth headset working principle is mobile phone and host by bluetooth connection, and host passes through nearly magnetic field induction skill with slave
Art (Near Field Magnetic Induction, abbreviation NFMI) or the connection of TWS agreement, at work, the sound on mobile phone
Music signal passes through in Bluetooth transmission to host, then is transmitted to slave by NFMI or TWS agreement by host, to realize left and right ear
Machine receives signal.
In the prior art, TWS bluetooth headset because its compact, it is easy to carry the features such as, favor by user.Host
Directly and mobile communication, slave by host indirectly and mobile communication, host power consumption is usually faster than slave, therefore many times uses
Family need to individually remove host, be put into charging box and charge, and in most variations in the prior art, fill when earphone is put into
When electric box charges, the power supply signal that earphone is obtained from charging box can be given to the reset pin of earphone Bluetooth circuit, lead to host quilt
Reset, cause at this time still in the slave chance of wearing state due to the reset of host with mobile phone disconnection, music momentary pause,
Reduce user experience.
Utility model content
The utility model provides a kind of TWS bluetooth headset reset control circuit, realizes when earphone works normally not to ear
Machine is resetted and is resetted in earphone non-normal working to earphone, is improved earphone and is resetted intelligent, promotion user experience.
In order to solve the above-mentioned technical problem, the utility model proposes following technical solutions to be resolved:
A kind of TWS bluetooth headset reset control circuit controls the TWS bluetooth headset for charging box and resets, the TWS
Bluetooth headset includes Bluetooth circuit, which is characterized in that the TWS bluetooth headset further includes comparison circuit；The charging box includes
The input terminal of voltage tunable road and control circuit, the voltage tunable road is connected with the power input of the charging box,
The control circuit is used to detect the working condition of the TWS bluetooth headset, and according to working state control adjustment
Voltage tunable road exports the voltage of the input terminal to the comparison circuit；The output end of the comparison circuit and bluetooth electricity
The reset signal end for controlling the reset of TWS bluetooth headset on road is connected；The TWS bluetooth ear is detected in the control circuit
The TWS bluetooth headset is controlled when machine non-normal working to reset.
Further, the voltage tunable road includes power-switching circuit and bleeder circuit, the power-switching circuit
Input terminal be connected with the power input of the charging box, output end is connected with the feeder ear of the bleeder circuit；According to institute
The working condition of TWS bluetooth headset is stated, the control circuit control adjusts the bleeder circuit and exports to the comparison circuit
The voltage of input terminal.
Further, the bleeder circuit includes first resistor and the concatenated second resistance of first resistor and is connected in parallel on institute
State the switch switching circuit at second resistance both ends；The switch switching circuit includes 3rd resistor and switching circuit；Described first
One end of resistance is connected with the output end of power-switching circuit, one end and the 3rd resistor of the other end and the second resistance
One end be connected；The other end of the second resistance is grounded；The switching circuit is connected to the other end of the 3rd resistor
Between ground, and the switching circuit is turned on or off by control circuit control；The partial pressure of the first resistor export to
The input terminal of the comparison circuit.
Further, the switching circuit is the switch element of high level conducting.
Further, the switch element of the high level conducting is NMOS tube, the reset of grid and the control circuit
Enable signal output end is connected, and drain electrode is connected with the other end of 3rd resistor, source electrode ground connection.
Further, the TWS bluetooth headset reset control circuit further includes the power input that the charging box is arranged in
The first filter circuit between end and the input terminal of power-switching circuit.
Further, the TWS bluetooth headset reset control circuit further includes the output end that the bleeder circuit is arranged in
The second filter circuit between the power output end of the charging box.
Further, the TWS bluetooth headset reset control circuit further includes being arranged in the switching circuit and the control
Third filter circuit between circuit processed.
Further, the earphone includes the earphone power input being connected with the power output end of the charging box, institute
Stating TWS bluetooth headset reset control circuit further includes the 4th filter circuit, and the 4th filter circuit setting is in the earphone electricity
Between source input terminal and the input terminal of the comparison circuit.
Further, the TWS bluetooth headset reset control circuit further includes the output end that the comparison circuit is arranged in
The 5th filter circuit between the reset signal end of the Bluetooth circuit.
Compared with prior art, the advantages of the utility model and beneficial effect is: the control circuit passed through in charging box is examined
It surveys whether earphone works normally, controls the comparison circuit that voltage tunable road exports certain voltage to earphone in normal work,
So that Bluetooth circuit is not issued earphone reset signal, and controls the output of voltage tunable road in non-normal working and be different from certain electricity
The voltage of pressure makes Bluetooth circuit issue earphone reset signal, realizes the intelligent reset of earphone, improve ear to the comparison circuit of earphone
Machine functional reliability, to promote user experience.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be practical to this
New embodiment or attached drawing needed to be used in the description of the prior art are made one and are briefly introduced, it should be apparent that, it is described below
Attached drawing is some embodiments of the utility model, for those of ordinary skill in the art, is not being made the creative labor
Under the premise of, it can also be obtained according to these attached drawings other accompanying drawings.
Fig. 1 is partial circuit schematic diagram of the utility model TWS bluetooth headset reset control circuit in charging box；
Fig. 2 is the circuit diagram of bleeder circuit in Fig. 1；
Fig. 3 is partial circuit principle of the utility model TWS bluetooth headset reset control circuit in TWS bluetooth headset
Figure.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
In order to solve in the prior art, when TWS bluetooth headset works normally, host is answered by the power supply input signal of charging box
The problem of position, the present embodiment is related to a kind of TWS bluetooth headset reset control circuit, multiple for charging box control TWS bluetooth headset
Position, as shown in figure 3, TWS bluetooth headset includes Bluetooth circuit 40 and comparison circuit 30；As shown in Figure 1, charging box includes that voltage can
Circuit 10 and control circuit 20, the input terminal on voltage tunable road 10 is adjusted to be connected with the power input of charging box, control circuit
20 for detecting the working condition of TWS bluetooth headset, and according to working state control adjust the output of voltage tunable road 10 to than
Compared with the voltage of the input terminal of circuit 30；The output end of comparison circuit 30 is with Bluetooth circuit 40 for resetting TWS bluetooth headset
Reset signal end is connected；TWS bluetooth headset is controlled when control circuit 20 detects TWS bluetooth headset non-normal working to reset.
Specifically, in the present embodiment, the output signal that voltage tunable road 10 is controlled by control circuit 20 adjusts output
Voltage, which is delivered to the input terminal of comparison circuit 30 by the power output end and earphone power input of charging box.
As shown in Figure 1, the present embodiment voltage tunable road 10 includes power-switching circuit 11 and bleeder circuit 12, power-switching circuit 11
It is converted for power level, and its input terminal is connected with the power input of charging box, and the confession of output end and bleeder circuit 12
Electric end is connected, and bleeder circuit 12 is input to the reset enable signal RES_EN that the voltage of comparison circuit 30 is exported by control circuit 20
Control, as shown in Fig. 2, bleeder circuit 12 include first resistor R1, second resistance R2 and the switching for being connected in parallel on the both ends R2
Circuit, the present embodiment switch switching circuit include 3rd resistor R3 and with the concatenated switching circuit 121 of 3rd resistor R3, first electricity
One end of resistance R1 is connected with the output end of power-switching circuit 11, and the other end is connected with one end of R2 and is connected with one end of R3,
The other end of R3 is grounded by switching circuit 121, and being turned on or off for switching circuit 121 enables letter by the reset of control circuit 20
The reset enable signal control that number output end RES_EN is issued, such as the ear of charging box is currently put into when control circuit 20 detects
When machine (such as host) is in normal operating conditions, control RES_EN issues the control terminal of low level signal to switching circuit 121
EN, switching circuit 121 do not turn on, and R3 is not accessed in bleeder circuit 12, and bleeder circuit 12 is connected by R1 and R2 and formed at this time, and by
The voltage Vout power supply that power-switching circuit 11 exports, therefore the partial pressure of R1 is denoted as V1, which is exported by the power supply of charging box
End output is exported to the input terminal of comparison circuit 30 to earphone power input, and comparison circuit 30 compares V1 and pre- at this time
If reference voltage Vref, V1 < Vref is set, comparison circuit 30 exports the reset signal end RESET of low level to Bluetooth circuit 40,
Bluetooth circuit 40 does not reset earphone, it is assumed that is host in charging box, then the communication of host and mobile phone will not be interrupted, slave
Communication with host will not be interrupted, and host sends master-slave swap order to slave, so that the slave worn is switched to host, after
Continued broadcasting is put the music on, and does not influence user's use.Such as when control circuit 20 detects that the earphone for being currently put into charging box is (such as main
Machine) in abnormal operating state (such as earphone crashes or situations such as program fleet), can by external trigger device (such as
Key, sensor etc.) it issues trigger signal and to control circuit 20 executes this detection, when detecting that external trigger device issues
Trigger signal when, control RES_EN issue high level signal to switching circuit 121 control terminal EN, switching circuit 121 be connected,
R3 is accessed in bleeder circuit 12, and bleeder circuit 12 is formed by connecting after R2 and R3 parallel connection with R1 at this time, and by power-switching circuit
The voltage Vout power supply of 11 outputs, since the resistance after R2 and R3 are in parallel is less than R2, partial pressure V2 > V1 of R1, the V2 at this time
It is exported by the power output end of charging box to earphone power input, and then is input to the input terminal of comparison circuit 30, at this time
Comparison circuit 30 compares V2 and predetermined reference voltage Vref, sets V2 > Vref, and comparison circuit 30 exports high level to Bluetooth circuit
40 reset signal end RESET, Bluetooth circuit 40 reset earphone, and earphone reenters normal operating condition, Yong Huzai
It does not need to restart traffic operation when secondary use.Switching circuit 121 can be the switch element of high level conducting, example in the present embodiment
Such as NMOS tube, grid G is connected with the reset enable signal output end RES_EN of control circuit 20, drain D and 3rd resistor R3
The other end be connected, source S ground connection.
In addition, in the present embodiment, in order to be filtered to input signal and output signal, as shown in Figure 1, in charging box
In, the first filter circuit 50 is arranged between power input and the input terminal of power-switching circuit 11, such as the first filtered electrical
Road 50 can be capacitor, and one end of this capacitor is connected with the input terminal of power input and power-switching circuit 11, the other end
Ground connection；The second filter circuit 60 between the output end of bleeder circuit 12 and the power output end of charging box；In switching circuit
Third filter circuit 70 is provided between 121 control terminal EN and the reset enable signal output end RES_EN of control circuit 20；
In earphone, in order to the voltage filter transmitted in earphone, between earphone power input and the input terminal of comparison circuit 30
It is provided with the 4th filter circuit 80, for example, the 4th filter capacitor 80 can be capacitor, one end of the capacitor and earphone power input
End is connected with the input terminal of comparison circuit 30, other end ground connection；And in the output end of comparison circuit 30 and Bluetooth circuit 40
It is provided with the 5th filter 90 between the RESET of reset signal end, for example, the 5th filter capacitor 90 can be capacitor, the capacitor
One end is connected with the reset signal end RESET of the output end of comparison circuit 30 and Bluetooth circuit 40, other end ground connection.
The present embodiment TWS bluetooth headset reset control circuit, by 20 test earphone of control circuit in charging box whether
It works normally, the voltage that control is input to comparison circuit 30 in normal work is certain voltage, issues Bluetooth circuit 40 not
Earphone reset signal, and it is the electricity different from certain voltage that in non-normal working, control, which is input to the voltage of comparison circuit 30,
Pressure makes Bluetooth circuit 40 issue earphone reset signal, realizes the intelligent reset of earphone, earphone functional reliability is improved, to mention
Rise user experience.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (10)
1. a kind of TWS bluetooth headset reset control circuit controls the TWS bluetooth headset for charging box and resets, the TWS is blue
Tooth earphone includes Bluetooth circuit, which is characterized in that the TWS bluetooth headset further includes comparison circuit；The charging box includes electricity
Pressure conditioned circuit and control circuit, the input terminal on the voltage tunable road are connected with the power input of the charging box, institute
It states control circuit and adjusts the electricity for detecting the working condition of the TWS bluetooth headset, and according to the working state control
Pressure conditioned circuit exports the voltage of the input terminal to the comparison circuit；The output end of the comparison circuit and the Bluetooth circuit
For control TWS bluetooth headset reset reset signal end be connected；The TWS bluetooth headset is detected in the control circuit
The TWS bluetooth headset is controlled when non-normal working to reset.
2. TWS bluetooth headset reset control circuit according to claim 1, which is characterized in that the voltage tunable road
Including power-switching circuit and bleeder circuit, the power input phase of the input terminal of the power-switching circuit and the charging box
Even, output end is connected with the feeder ear of the bleeder circuit；According to the working condition of the TWS bluetooth headset, the control electricity
Road control adjusts the voltage that the bleeder circuit exports the input terminal to the comparison circuit.
3. TWS bluetooth headset reset control circuit according to claim 2, which is characterized in that the bleeder circuit includes
First resistor and the concatenated second resistance of first resistor and the switch switching circuit for being connected in parallel on the second resistance both ends；It is described
Switch switching circuit includes 3rd resistor and switching circuit；The output end phase of one end of the first resistor and power-switching circuit
Even, the other end is connected with one end of the second resistance and one end of the 3rd resistor；The other end of the second resistance
Ground connection；The switching circuit is connected between the other end and ground of the 3rd resistor, and the switching circuit is by the control
Circuit control is turned on or off；The partial pressure of the first resistor is exported to the input terminal of the comparison circuit.
4. TWS bluetooth headset reset control circuit according to claim 3, which is characterized in that the switching circuit is height
The switch element of level conducting.
5. TWS bluetooth headset reset control circuit according to claim 4, which is characterized in that the high level conducting
Switch element is NMOS tube, and grid is connected with the reset enable signal output end of the control circuit, drain electrode and 3rd resistor
The other end be connected, source electrode ground connection.
6. TWS bluetooth headset reset control circuit according to claim 2, which is characterized in that further include being arranged described
The first filter circuit between the power input of charging box and the input terminal of power-switching circuit.
7. TWS bluetooth headset reset control circuit according to claim 3, which is characterized in that further include being arranged described
The second filter circuit between the output end of bleeder circuit and the power output end of the charging box.
8. TWS bluetooth headset reset control circuit according to claim 3, which is characterized in that further include being arranged described
Third filter circuit between switching circuit and the control circuit.
9. TWS bluetooth headset reset control circuit according to claim 1, which is characterized in that the earphone includes and institute
State the connected earphone power input of the power output end of charging box, the TWS bluetooth headset reset control circuit further includes the
Four filter circuits, the 4th filter circuit be arranged in the earphone power input and the comparison circuit input terminal it
Between.
10. according to claim 1 or TWS bluetooth headset reset control circuit described in 9, which is characterized in that further include that setting exists
The 5th filter circuit between the output end of the comparison circuit and the reset signal end of the Bluetooth circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822105390.5U CN209072694U (en) | 2018-12-14 | 2018-12-14 | A kind of TWS bluetooth headset reset control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822105390.5U CN209072694U (en) | 2018-12-14 | 2018-12-14 | A kind of TWS bluetooth headset reset control circuit |
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| CN209072694U true CN209072694U (en) | 2019-07-05 |
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| CN201822105390.5U Active CN209072694U (en) | 2018-12-14 | 2018-12-14 | A kind of TWS bluetooth headset reset control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110740401A (en) * | 2019-10-30 | 2020-01-31 | 歌尔科技有限公司 | earphone reset device and wireless earphone equipment |
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2018
- 2018-12-14 CN CN201822105390.5U patent/CN209072694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110740401A (en) * | 2019-10-30 | 2020-01-31 | 歌尔科技有限公司 | earphone reset device and wireless earphone equipment |
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