CN203180871U - Bluetooth earphone reset circuit - Google Patents
Bluetooth earphone reset circuit Download PDFInfo
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- CN203180871U CN203180871U CN 201320145033 CN201320145033U CN203180871U CN 203180871 U CN203180871 U CN 203180871U CN 201320145033 CN201320145033 CN 201320145033 CN 201320145033 U CN201320145033 U CN 201320145033U CN 203180871 U CN203180871 U CN 203180871U
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- reset
- bluetooth earphone
- npn type
- resistor
- type triode
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Abstract
The utility model provides a bluetooth earphone reset circuit. The circuit comprises a reset capacitor, a current-limiting resistor, a pull-up resistor, an adjustable resistor and a NPN type triode. One end of the reset capacitor is connected with an output terminal of a slide switch of the bluetooth earphone and the other end is connected with one end of the current-limiting resistor and one end of the adjustable resistor. The other end of the current-limiting resistor is connected with a base electrode of the NPN type triode. An emitting electrode of the NPN type triode and the other end of the adjustable resistor are grounded. The pull-up resistor is connected in series between a power supply output terminal of the bluetooth earphone and a collector electrode of the NPN type triode. The collector electrode of the NPN type triode is also connected to a reset pin of a bluetooth chip. The output terminal of the slide switch is connected with an enabled pin of the bluetooth chip and an input terminal is connected with the power supply output terminal. By using the bluetooth earphone reset circuit of the utility model, boot reset of the bluetooth earphone can be realized without carrying out complex operation. The circuit structure is simple and the actual operation is easy.
Description
Technical field
The utility model relates to the bluetooth earphone technical field, relates in particular to a kind of bluetooth earphone reset circuit.
Background technology
Present most of bluetooth earphone is prolongation battery service time, mostly uses slide switch to carry out switching on and shutting down, and when slide switch was opened (off, namely the switching on and shutting down slide key slides or toggles it to the shutdown position), earphone was in off-mode; When slide switch closure (on, namely the switching on and shutting down slide key slides or toggles it to the start position), the earphone start.
Fig. 1 is the electrical block diagram of a kind of bluetooth earphone in the prior art.The lithium cell charging circuit operated by rotary motion of this bluetooth earphone is in Bluetooth chip inside, so lithium battery E directly is connected on the power pins Vbat of Bluetooth chip; And the slide switch S that is used for switching on and shutting down meets the enable pin EN of Bluetooth chip, and when slide switch S was closed, the power circuit of Bluetooth chip inside was opened, the bluetooth earphone start; When slide switch S opened, Bluetooth chip cut off inner power circuit, realized shutdown.
In some cases, the program of Bluetooth chip inside may be run and be flown, and causes Bluetooth chip can not detect the action of slide switch S, causes the bluetooth earphone can not the normal switch machine, causes bluetooth earphone to use, and is perhaps excessive in the shutdown power consumption.Therefore in the circuit of bluetooth earphone, generally can add reset circuit, make bluetooth earphone under specific operation, can realize that Bluetooth chip resets.
Thereby a kind of principle that resets of bluetooth earphone is long to allow Bluetooth chip reset by the some buttons on the bluetooth earphone or the operation of carrying out Macintosh in the prior art, the shortcoming of this method is: the circuit design more complicated needs the user to understand simultaneously with taking time and effort and is accustomed to this pattern.
Therefore, need a kind of bluetooth earphone reset circuit, to avoid above-mentioned defective.
The utility model content
The purpose of this utility model is to provide a kind of bluetooth earphone reset circuit, can simplify reset circuit and simplify reset operation.
For addressing the above problem, the utility model provides a kind of bluetooth earphone reset circuit, comprises reset capacitance, current-limiting resistance, pull-up resistor, adjustable resistance and NPN type triode; The output of the slide switch of the described bluetooth earphone of described reset capacitance one termination, an end of the described current-limiting resistance of another termination and adjustable resistance; The base stage of the described NPN type of another termination triode of described current-limiting resistance; The equal ground connection of the other end of the emitter of described NPN type triode and adjustable resistance, described pull-up resistor is connected between the collector electrode of the power output end of described bluetooth earphone and NPN type triode, the collector electrode of described NPN type triode also is connected on the reset pin of described Bluetooth chip, the enable pin of the described Bluetooth chip of output termination of described slide switch, the described power output end of input termination.
Further, the capacitance of described reset capacitance is microfarad range, and the resistance value of described current-limiting resistance, pull-up resistor, adjustable resistance is a kilohm level.
Further, the capacitance of described reset capacitance is 1 microfarad, and the resistance value of described current-limiting resistance, pull-up resistor, adjustable resistance is 10 kilohms.
Further, the voltage of described power output end output is 1.8 volts or 3.3 volts.
Compared with prior art, bluetooth earphone reset circuit provided by the utility model comprises reset capacitance, current-limiting resistance, pull-up resistor, adjustable resistance and NPN type triode; The output of the slide switch of the described bluetooth earphone of described reset capacitance one termination, an end of the described current-limiting resistance of another termination and adjustable resistance; The base stage of the described NPN type of another termination triode of described current-limiting resistance; The equal ground connection of the other end of the emitter of described NPN type triode and adjustable resistance, described pull-up resistor is connected between the collector electrode of the power output end of described bluetooth earphone and NPN type triode, the collector electrode of described NPN type triode also is connected on the reset pin of described Bluetooth chip, the enable pin of the described Bluetooth chip of output termination of described slide switch, the described power output end of input termination.If bluetooth earphone is in the deadlock state, stir the slide switch start, the reset capacitance charging, the emitter and collector conducting of NPN type triode, the reset pin low level of Bluetooth chip, do not reset thereby do not need to carry out the start that complicated operations can realize bluetooth earphone, circuit structure is simple, and practical operation is easy.
Description of drawings
Fig. 1 is the electrical block diagram of a kind of bluetooth earphone in the prior art.
Fig. 2 is the structural representation of a kind of bluetooth earphone reset circuit of the utility model specific embodiment.
Fig. 3 is the test waveform schematic diagram of the bluetooth earphone reset circuit of the utility model specific embodiment.
Embodiment
Core concept of the present utility model is to disclose a kind of bluetooth earphone reset circuit, comprises reset capacitance, current-limiting resistance, pull-up resistor, adjustable resistance and NPN type triode; The output of the slide switch of the described bluetooth earphone of described reset capacitance one termination, an end of the described current-limiting resistance of another termination and adjustable resistance; The base stage of the described NPN type of another termination triode of described current-limiting resistance; The equal ground connection of the other end of the emitter of described NPN type triode and adjustable resistance, described pull-up resistor is connected between the collector electrode of the power output end of described bluetooth earphone and NPN type triode, the collector electrode of described NPN type triode also is connected on the reset pin of described Bluetooth chip, the enable pin of the described Bluetooth chip of output termination of described slide switch, the described power output end of input termination.If bluetooth earphone is in the deadlock state, stir the slide switch start, the reset capacitance charging, the emitter and collector conducting of NPN type triode, the reset pin low level of Bluetooth chip, can not realize that start pressure Bluetooth chip resets thereby do not need to carry out complicated operations, circuit structure is simple, and practical operation is easy.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is further described, yet the utility model can be realized with different forms, should not think just to be confined to described embodiment.
Please refer to Fig. 2, present embodiment provides a kind of bluetooth earphone reset circuit, comprises reset capacitance C1, current-limiting resistance R2, pull-up resistor R3, adjustable resistance R1 and NPN type triode Q1; Described reset capacitance C1 one end (anode) connects the output of the slide switch S of described bluetooth earphone, and the other end (negative terminal) connects the end of described current-limiting resistance R2 and adjustable resistance R1; The base stage of the described NPN type of another termination triode Q1 of described current-limiting resistance R2; The emitter of described NPN type triode Q1 and the equal ground connection of the other end of adjustable resistance R1, described pull-up resistor R3 is connected between the collector electrode of the power output end Vbat of described bluetooth earphone and NPN type triode Q1, the collector electrode of described NPN type triode Q1 also is connected on the reset pin RESET of described Bluetooth chip, the enable pin EN of the described Bluetooth chip of output termination of described slide switch S, the described power output end Vbat of input termination.
The voltage of described power output end Vbat output is the internal electric source (battery) of Bluetooth chip, is generally 1.8V or 3.3V.Adjustable resistance R1 is mainly used in controlling the time that discharges and recharges and the reset signal pulse duration of reset capacitance C1.NPN type triode Q1 plays reset signal pulse paraphase amplification, can reduce the output impedance of bluetooth earphone reset circuit, improves the antijamming capability of bluetooth earphone reset circuit.
Be the operation principle that example illustrates the bluetooth earphone reset circuit of present embodiment below with 1.8V.
If bluetooth earphone is in the deadlock state, the power supply 1.8V of Bluetooth chip inside can not close.When slide switch S is closed, it is the branch road conducting of slide switch S place, the end of reset capacitance C1 directly meets Vbat, the battery that is bluetooth earphone can charge to reset capacitance C1, the intersection point place of adjustable resistance R1 and current-limiting resistance R2 can become cell voltage immediately, along with the charging of reset capacitance C1, this intersection point place voltage slowly reduces then.Therefore in the charging process of reset capacitance C1, the base voltage of NPN triode Q1 can rise to the saturation conduction voltage of NPN triode Q1, the emitter and collector conducting of NPN triode Q1, the level of the reset pin RESET of Bluetooth chip (Vreset among Fig. 3) can become low level, and this moment, Bluetooth chip resetted.When reset capacitance C1 was full of, the base stage of NPN triode Q1 can become low level, and NPN triode Q1 can be in cut-off state, and the RESET pin of Bluetooth chip can become high level 1.8V.
Wherein, the capacitance of described reset capacitance is microfarad range, and the resistance value of described current-limiting resistance, pull-up resistor, adjustable resistance is a kilohm level.Choosing of NPN triode Q1 do not have special requirement.
With capacitor C 1=1 μ F, R1=R2=R3=10K Ω is example, and the waveform of test as shown in Figure 3.Can be seen that by Fig. 3 when slide switch S was closed, the pin of Bluetooth chip had the low reset signal pulse of 15.6ms, this pulse can so that Bluetooth chip reset.The width of this reset signal pulse can be adjusted by the value of reset capacitance C1, adjustable resistance R1 and current-limiting resistance R2.
In sum, the bluetooth earphone reset circuit that present embodiment provides, structure is comparatively simple, and the pulse duration of reset signal is configurable, can not need to carry out complicated operations and the time bluetooth earphone is resetted stirring the slide switch start effectively.
Obviously, those skilled in the art can carry out various changes and modification to utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (4)
1. a bluetooth earphone reset circuit is characterized in that, comprises reset capacitance, current-limiting resistance, pull-up resistor, adjustable resistance and NPN type triode; The output of the slide switch of the described bluetooth earphone of described reset capacitance one termination, an end of the described current-limiting resistance of another termination and adjustable resistance; The base stage of the described NPN type of another termination triode of described current-limiting resistance; The equal ground connection of the other end of the emitter of described NPN type triode and adjustable resistance, described pull-up resistor is connected between the collector electrode of the power output end of described bluetooth earphone and NPN type triode, the collector electrode of described NPN type triode also is connected on the reset pin of described Bluetooth chip, the enable pin of the described Bluetooth chip of output termination of described slide switch, the described power output end of input termination.
2. bluetooth earphone reset circuit as claimed in claim 1 is characterized in that, the capacitance of described reset capacitance is microfarad range, and the resistance value of described current-limiting resistance, pull-up resistor, adjustable resistance is a kilohm level.
3. bluetooth earphone reset circuit as claimed in claim 1 or 2 is characterized in that, the capacitance of described reset capacitance is 1 microfarad, and the resistance value of described current-limiting resistance, pull-up resistor, adjustable resistance is 10 kilohms.
4. bluetooth earphone reset circuit as claimed in claim 1 is characterized in that, the voltage of described power output end output is 1.8 volts or 3.3 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320145033 CN203180871U (en) | 2013-03-27 | 2013-03-27 | Bluetooth earphone reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320145033 CN203180871U (en) | 2013-03-27 | 2013-03-27 | Bluetooth earphone reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180871U true CN203180871U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320145033 Expired - Lifetime CN203180871U (en) | 2013-03-27 | 2013-03-27 | Bluetooth earphone reset circuit |
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| Country | Link |
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| CN (1) | CN203180871U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647534A (en) * | 2013-11-29 | 2014-03-19 | 青岛歌尔声学科技有限公司 | Key reset circuit of electronic equipment |
| CN103825593A (en) * | 2014-03-18 | 2014-05-28 | 青岛歌尔声学科技有限公司 | Reset signal generating circuit and electronic equipment |
| CN104124952A (en) * | 2014-07-22 | 2014-10-29 | 上海强邦电子有限公司 | Recognizable keying circuit |
| CN106760993A (en) * | 2016-12-12 | 2017-05-31 | 上海图正信息科技股份有限公司 | A kind of electronic lock |
| CN109587592A (en) * | 2018-06-19 | 2019-04-05 | 伍军华 | Bluetooth headset and its on-off control method |
| CN111615029A (en) * | 2020-04-23 | 2020-09-01 | 深圳市豪恩声学股份有限公司 | Wireless earphone reset circuit, wireless earphone and reset method |
-
2013
- 2013-03-27 CN CN 201320145033 patent/CN203180871U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647534A (en) * | 2013-11-29 | 2014-03-19 | 青岛歌尔声学科技有限公司 | Key reset circuit of electronic equipment |
| CN103647534B (en) * | 2013-11-29 | 2016-06-08 | 青岛歌尔声学科技有限公司 | The key reset circuit of a kind of electronics |
| CN103825593A (en) * | 2014-03-18 | 2014-05-28 | 青岛歌尔声学科技有限公司 | Reset signal generating circuit and electronic equipment |
| CN104124952A (en) * | 2014-07-22 | 2014-10-29 | 上海强邦电子有限公司 | Recognizable keying circuit |
| CN104124952B (en) * | 2014-07-22 | 2018-03-27 | 上海强邦电子有限公司 | A kind of recognizable key circuit |
| CN106760993A (en) * | 2016-12-12 | 2017-05-31 | 上海图正信息科技股份有限公司 | A kind of electronic lock |
| CN109587592A (en) * | 2018-06-19 | 2019-04-05 | 伍军华 | Bluetooth headset and its on-off control method |
| CN111615029A (en) * | 2020-04-23 | 2020-09-01 | 深圳市豪恩声学股份有限公司 | Wireless earphone reset circuit, wireless earphone and reset method |
| WO2021212718A1 (en) * | 2020-04-23 | 2021-10-28 | 深圳市豪恩声学股份有限公司 | Wireless earbud resetting circuit, wireless earbud, and resetting method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |