CN206640560U - A kind of hardware reset circuit and electronic product - Google Patents
A kind of hardware reset circuit and electronic product Download PDFInfo
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- CN206640560U CN206640560U CN201720311299.1U CN201720311299U CN206640560U CN 206640560 U CN206640560 U CN 206640560U CN 201720311299 U CN201720311299 U CN 201720311299U CN 206640560 U CN206640560 U CN 206640560U
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- switch pipe
- switch
- control unit
- reset circuit
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Abstract
The utility model discloses a kind of hardware reset circuit and electronic product, hardware reset circuit includes control unit, first switch pipe, second switch pipe, charging capacitor, charging resistor, USB interface；The output end output pwm signal of control unit to first switch pipe control terminal；The control terminal of one end connection second switch pipe of the switch ways of first switch pipe, and be grounded by charging capacitor；The other end ground connection of the switch ways of first switch pipe；The voltage input end of USB interface is charged by charging resistor for charging capacitor；Voltage input end is grounded by the switch ways of second switch pipe；Wherein one end of the switch ways of second switch pipe sends reset signal to the reset terminal of control unit.The utility model utilizes USB interface and two switching tubes, realizes hardware reset function by inserting USB when control unit crashes, is resetted without using physical button, solves the problems, such as that conventional RESET circuit relies on physical button and resetted.
Description
Technical field
The utility model belongs to hardware circuit technical field, is to be related to a kind of hardware reset circuit and adopt specifically
The electronic product designed with the hardware reset circuit.
Background technology
In existing wearing class product, either bluetooth earphone or motion bracelet and wrist-watch, in the appearance of product master chip
During abnormal deadlock, most of product still relies on the hardware reset function that conventional physical button realizes product.And conventional thing
Reason button is largely required for increasing perforate in structural housing, will necessarily so increase electrostatic and water enters the path of product,
So that the risk of product is high, security is poor.
The content of the invention
The utility model provides a kind of hardware reset circuit, improves security.
In order to solve the above technical problems, the utility model is achieved using following technical scheme：
A kind of hardware reset circuit, including control unit, first switch pipe, second switch pipe, charging capacitor, charging electricity
Resistance, USB interface；The output end output pwm signal of described control unit is to the control terminal of the first switch pipe, control described the
The break-make of one switching tube；One end of the switch ways of the first switch pipe connects the control terminal of the second switch pipe, and logical
Cross the charging capacitor ground connection；The other end ground connection of the switch ways of the first switch pipe；The control source of the USB interface
Charged by the charging resistor for the charging capacitor at end；The voltage input end is led to by the switch of the second switch pipe
Road is grounded；Wherein one end of the switch ways of the second switch pipe sends reset signal to the reset terminal of described control unit.
Further, the first switch pipe is NMOS tube, and the grid of the first switch pipe connects described control unit
Output end, and pass through resistance eutral grounding；The source ground of the first switch pipe, the first switch pipe drain electrode connection described in
The control terminal of second switch pipe, and be grounded by the charging capacitor.
Further, the second switch pipe is NMOS tube, and the grid connection described first of the second switch pipe is opened
Close one end of the switch ways of pipe；The voltage input end is grounded by the switch ways of the second switch pipe, and described second
The drain/source of switching tube sends reset signal to the reset terminal of described control unit.
Further, the drain electrode of the second switch pipe connects the voltage input end, the source of the second switch pipe
Pole is grounded by pull down resistor, and the source electrode of the second switch pipe is connected the control list with the connecting node of the pull down resistor
The reset terminal of member.
Further, the source ground of the second switch pipe, the drain electrode of the second switch pipe pass through pull-up resistor
The voltage input end is connected, the drain electrode of the second switch pipe is connected the control list with the connecting node of the pull-up resistor
The reset terminal of member.
Preferably, the first switch pipe is NPN triode, and the base stage of the first switch pipe connects described control unit
Output end, and pass through resistance eutral grounding；The grounded emitter of the first switch pipe, the colelctor electrode connection of the first switch pipe
The control terminal of the second switch pipe, and be grounded by the charging capacitor.
Further, the second switch pipe is NPN triode, and the base stage connection described first of the second switch pipe is opened
Close one end of the switch ways of pipe；The voltage input end is grounded by the switch ways of the second switch pipe, and described second
The collector/emitter of switching tube sends reset signal to the reset terminal of described control unit.
Further, the colelctor electrode of the second switch pipe connects the voltage input end, the second switch pipe
Emitter stage is grounded by pull down resistor, described in the emitter stage of the second switch pipe is connected with the connecting node of the pull down resistor
The reset terminal of control unit.
Further, the grounded emitter of the second switch pipe, the colelctor electrode of the second switch pipe pass through pull-up
Resistance connects the voltage input end, described in the colelctor electrode of the second switch pipe is connected with the connecting node of the pull-up resistor
The reset terminal of control unit.
Based on the structure design of above-mentioned hardware reset circuit, the utility model also proposed a kind of using the hardware reset
The electronic product of circuit design, including shell, described hardware reset circuit, the hardware reset are provided with the shell
Circuit includes control unit, first switch pipe, second switch pipe, charging capacitor, charging resistor, USB interface；Described control unit
Output end output pwm signal to the control terminal of the first switch pipe, control the break-make of the first switch pipe；Described first
One end of the switch ways of switching tube connects the control terminal of the second switch pipe, and is grounded by the charging capacitor；It is described
The other end ground connection of the switch ways of first switch pipe；The voltage input end of the USB interface is institute by the charging resistor
State charging capacitor charging；The voltage input end is grounded by the switch ways of the second switch pipe；The second switch pipe
Wherein one end of switch ways send reset signal to the reset terminal of described control unit.
Compared with prior art, the advantages of the utility model and good effect is：Hardware reset circuit of the present utility model
And electronic product, using USB interface and two switching tubes, hardware reset work(is realized by inserting USB when control unit crashes
Can, resetted without using physical button, solve the problems, such as conventional RESET circuit rely on physical button reset, avoid due to
Structure perforate caused by resetting physical button, reduces the perforate on the shell of circuit, reduces electrostatic and water enters through perforate
Enter the path of circuit, reduce the risk of electrostatic and water inlet, improve the safety and stability of circuit, extend using the longevity
Life, reduces maintenance cost, improves user experience.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantage of the present utility model
It will become clearer.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the one embodiment for the hardware reset circuit that the utility model is proposed；
Fig. 2 is the circuit theory diagrams of the one embodiment for the hardware reset circuit that the utility model is proposed；
Fig. 3 is the circuit theory diagrams of another embodiment of the hardware reset circuit that the utility model is proposed；
Fig. 4 is the circuit theory diagrams of another embodiment of the hardware reset circuit that the utility model is proposed；
Fig. 5 is the circuit theory diagrams of the further embodiment for the hardware reset circuit that the utility model is proposed.
Embodiment
Specific embodiment of the present utility model is described in more detail below in conjunction with the accompanying drawings.
Embodiment one, the hardware reset circuit of the present embodiment mainly include control unit, first switch pipe Q1, second switch
Pipe Q2, charging capacitor C1, charging resistor R3, USB interface etc., shown in Figure 1, output end and the first switch pipe of control unit
Q1 control terminal connection, the output end output pwm signal of control unit control first switch to first switch pipe Q1 control terminal
Pipe Q1 break-make；One end connection second switch pipe Q2 of first switch pipe Q1 switch ways control terminal, and pass through the electricity that charges
Hold C1 ground connection；The other end ground connection of first switch pipe Q1 switch ways；The voltage input end VBUS of USB interface passes through the electricity that charges
R3 is hindered to charge for charging capacitor C1；Voltage input end VBUS is grounded by second switch pipe Q2 switch ways；Second switch pipe
Wherein one end of Q2 switch ways sends reset signal to the reset terminal of control unit.
When USB interface is inserted with USB, USB is that the voltage input end VBUS of USB interface powers, on voltage input end VBUS
Electricity（Voltage is 5V）.
When control unit normal operation, the control of the output end output pwm signal of control unit to first switch pipe Q1
End, control first switch pipe Q1 break-make.Low level in pwm signal make it that first switch pipe Q1 control terminal is low level,
First switch pipe Q1 is turned off, and the electric current that USB is provided charges through voltage input end VBUS, charging resistor R3 for charging capacitor C1, when
When voltage on charging capacitor C1 is also not up to second switch pipe Q2 conducting voltage, the high level in pwm signal causes first
Switching tube Q1 control terminal is high level, and first switch pipe Q1 is turned on, and switch of the C1 charging current through first switch pipe Q1 leads to
With flowing into, the voltage on C1 is unable to reach second switch pipe Q2 conducting voltage on road, and second switch pipe Q2 is off shape all the time
State；Wherein one end of second switch pipe Q2 switch ways sends invalid reset signal to the reset terminal of control unit, control
Unit does not reset.By the dutycycle for adjusting pwm signal so that in the presence of pwm signal, the voltage on charging capacitor C1 begins
Second switch pipe Q2 conducting voltage is unable to reach eventually.
When there is abnormal crash in control unit, control unit can not output pwm signal, first switch pipe Q1 control terminal
Voltage is pulled to low level, first switch pipe Q1 shut-offs, and the electric current that USB is provided is through voltage input end VBUS, charging resistor R3
Charging capacitor C1 charges, and the voltage on C1 gradually rises, when the voltage on C1 reaches second switch pipe Q2 conducting voltage, the
Two switching tube Q2 are turned on, and wherein one end of second switch pipe Q2 switch ways sends effective reset signal to control unit
Reset terminal, control unit reset.
By adjusting charging resistor R3 and charging capacitor C1 parameter, adjustment insertion USB that can be flexible makes control
The time that unit resets.
After the completion of control unit reset, pwm signal can be continuously sent out, charging capacitor C1 can not continue to charge, and fill
Electric capacity C1 self discharges, the voltage on charging capacitor C1 gradually reduces, when not reaching second switch pipe Q2 conducting voltage, second
Switching tube Q2 is turned off, and wherein one end of second switch pipe Q2 switch ways sends invalid reset signal answering to control unit
Position end, control unit normal operation.
The hardware reset circuit of the present embodiment, using USB interface and two switching tubes, when control unit crashes by inserting
Enter USB and realize hardware reset function, resetted without using physical button, solve conventional RESET circuit and rely on physical button
The problem of reset, structure perforate caused by due to resetting physical button is avoided, reduces the perforate on the shell of circuit, reduced
Electrostatic and water enter the path of circuit through perforate, reduce the risk of electrostatic and water inlet, improve the security of circuit and steady
It is qualitative, service life is extended, reduces maintenance cost, improves user experience；Moreover, the hardware reset of the present embodiment
Circuit control mode is fairly simple, easy to use；It is simple in construction, be easy to implement, cost is relatively low, easy to utilize.
In the present embodiment, first switch pipe and second switch pipe are high conduction voltage drop switching tube, such as NMOS tube, NPN
Triode etc., stable performance, cost are relatively low.
Below so that first switch pipe Q1 is NMOS tube, second switch pipe Q2 is NMOS tube as an example, to hardware reset circuit
Particular circuit configurations are described in detail.
It is shown in Figure 2, the output end of first switch pipe Q1 grid connection control unit, and Q1 grid passes through resistance
R1 is grounded；Q1 source ground, Q1 drain electrode connection second switch pipe Q2 grid, Q1 drain electrode are connect by charging capacitor C1
Ground；Voltage input end VBUS is grounded by second switch pipe Q2 switch ways, and second switch pipe Q2 drain/source is sent again
Position signal to control unit reset terminal.
When the reset terminal high level of control unit is effective, the voltage of second switch pipe Q2 drain electrode connection USB interface is defeated
Enter and hold VBUS, Q2 source electrode is grounded by pull down resistor R4, and Q2 source electrode is connected control list with pull down resistor R4 connecting node
The reset terminal of member.
When control unit normal operation, the control terminal of control unit output pwm signal to first switch pipe Q1, PWM letters
Low level in number causes Q1 to turn off, and USB charges for C1；High level in pwm signal causes Q1 to turn on, the switch that C1 passes through Q1
Path discharges；By the dutycycle for adjusting pwm signal so that in the presence of pwm signal, the voltage on charging capacitor C1 is all the time
Second switch pipe Q2 conducting voltage is unable to reach, second switch pipe Q2 is off state, second switch pipe Q2 source all the time
It is low level at pole and pull down resistor R4 connecting node, that is, sends invalid low level signal to the reset terminal of control unit,
Control unit does not reset.
When there is abnormal crash in control unit, control unit can not output pwm signal, first switch pipe Q1 grid electricity
Pressure is pulled to low level by resistance R1, first switch pipe Q1 shut-off, the electric currents of USB offers through voltage input end VBUS, fill
Resistance R3 charges for charging capacitor C1, and the voltage on C1 gradually rises, when the voltage on C1 reaches leading for second switch pipe Q2
During the pressure that is powered, second switch pipe Q2 conductings, switch of the electric current through voltage input end VBUS, second switch pipe Q2 that USB is provided leads to
Road, R4 flow into ground；Q2 source electrode sends effective high level and resets letter with being high level at pull down resistor R4 connecting node
Number to control unit reset terminal, control unit reset.
For the ease of adjusting the amplitude of reset signal, be in series with resistance R2 between Q2 source electrode and resistance R4, resistance R2 with
The reset terminal connection of connecting node and control unit between R4.By adjusting the resistance value ratio between R2 and R4, so as to adjust electricity
Voltage magnitude between resistance R2 and R4 at connecting node, and then adjust the amplitude of reset signal.
In order to avoid malfunction, resistance R2 and resistance R4 connecting node are connect by filter capacitor C2 caused by signal jitter
Ground, filtering clutter, avoid signal jitter from causing control unit maloperation, improve the stability of circuit operation.
As another preferred design of the present embodiment, when the reset terminal low level of control unit is effective, referring to
Shown in Fig. 3, second switch pipe Q2 source ground, Q2 drain electrode passes through the voltage input end of pull-up resistor R5 connection USB interfaces
VBUS, Q2 drain electrode are connected the reset terminal of control unit with pull-up resistor R5 connecting node.When control unit normal operation,
Control unit output pwm signal is to first switch pipe Q1 control terminal, and the low level in pwm signal causes Q1 to turn off, USB C1
Charging；High level in pwm signal causes Q1 to turn on, and C1 is discharged by Q1 switch ways；By the duty for adjusting pwm signal
Than so that in the presence of pwm signal, the voltage on charging capacitor C1 is unable to reach second switch pipe Q2 electric conduction all the time
Pressure, second switch pipe Q2 are off state all the time, and second switch pipe Q2 drain electrode with being at pull-up resistor R5 connecting node
High level, that is, send invalid high level signal to the reset terminal of control unit, control unit and do not reset.When control unit occurs
It is abnormal when crashing, control unit can not output pwm signal, first switch pipe Q1 grid voltage is pulled to low electricity by resistance R1
Flat, first switch pipe Q1 shut-off, the electric current that USB is provided is that charging capacitor C1 fills through voltage input end VBUS, charging resistor R3
Electricity, the voltage on C1 are gradually risen, and when the voltage on C1 reaches second switch pipe Q2 conducting voltage, second switch pipe Q2 is led
Logical, switch ways of the electric current that USB is provided through voltage input end VBUS, R5, second switch pipe Q2 flow into ground；Q2 drain electrode with it is upper
It is low level at pull-up resistor R5 connecting node, that is, sends effective low level reset signal to the reset terminal of control unit, control
Unit processed resets.
The present embodiment also proposed a kind of electronic product, including shell, and described hardware reset electricity is provided with shell
Road, USB are connected through the USB interface of shell and hardware reset circuit, and electric energy is provided for the voltage input end of USB interface.
By designing described hardware reset circuit on electronic product, using USB interface and two switching tubes, controlling
Unit realizes the hardware reset function of electronic product by inserting USB when crashing, resetted, avoided without using physical button
Due to the perforate of shell mechanism caused by physical button, product electrostatic and water inlet risk are reduced, realizes more preferable product protection,
The security of product is improved, is increased the service life, improves user experience, improves product competitiveness.
Embodiment two, the hardware reset circuit and embodiment one of the present embodiment difference in place of be first switch pipe Q1 and
Second switch pipe Q2 selection is different, and in the present embodiment, first switch pipe Q1 and second switch pipe Q2 elect the poles of NPN tri- as
Pipe, remaining circuit structure is identical with embodiment one, specifically can refer to embodiment one.
Shown in Figure 4, first switch pipe Q1 is NPN triode, and second switch pipe Q2 is NPN triode.
The output end of first switch pipe Q1 base stage connection control unit, and Q1 base stage is grounded by resistance R1, Q1's
Grounded emitter, Q1 colelctor electrode connection second switch pipe Q2 base stage, Q1 colelctor electrode are grounded by charging capacitor C1；Voltage
Input VBUS is grounded by second switch pipe Q2 switch ways, and second switch pipe Q2 collector/emitter sends reset
Signal to control unit reset terminal.
When the reset terminal high level of control unit is effective, the voltage of second switch pipe Q2 colelctor electrode connection USB interface
Input VBUS, Q2 emitter stage are grounded by pull down resistor R4, and Q2 emitter stage is connected with pull down resistor R4 connecting node
The reset terminal of control unit.
When control unit normal operation, the control terminal of control unit output pwm signal to first switch pipe Q1, PWM letters
Low level in number causes Q1 to turn off, and USB charges for C1；High level in pwm signal causes Q1 to turn on, the switch that C1 passes through Q1
Path discharges；By the dutycycle for adjusting pwm signal so that in the presence of pwm signal, the voltage on charging capacitor C1 is all the time
Second switch pipe Q2 conducting voltage is unable to reach, second switch pipe Q2 is off state, second switch pipe Q2 hair all the time
Emitter-base bandgap grading sends reset of the invalid low level signal to control unit with being low level at pull down resistor R4 connecting node
End, control unit do not reset.
When there is abnormal crash in control unit, control unit can not output pwm signal, first switch pipe Q1 base stage electricity
Pressure is pulled to low level by resistance R1, first switch pipe Q1 shut-off, the electric currents of USB offers through voltage input end VBUS, fill
Resistance R3 charges for charging capacitor C1, and the voltage on C1 gradually rises, when the voltage on C1 reaches leading for second switch pipe Q2
During the pressure that is powered, second switch pipe Q2 conductings, switch of the electric current through voltage input end VBUS, second switch pipe Q2 that USB is provided leads to
Road, R4 flow into ground；Q2 emitter stage sends effective high level and resetted with being high level at pull down resistor R4 connecting node
Signal to control unit reset terminal, control unit reset.
For the ease of adjusting the amplitude of reset signal, resistance R2, resistance R2 are in series between Q2 emitter stage and resistance R4
The reset terminal of connecting node and control unit between R4 is connected.By adjusting the resistance value ratio between R2 and R4, so as to adjust
Voltage magnitude between resistance R2 and R4 at connecting node, and then adjust the amplitude of reset signal.
As another preferred design of the present embodiment, when the reset terminal low level of control unit is effective, referring to
Shown in Fig. 5, second switch pipe Q2 grounded emitter, Q2 colelctor electrode is defeated by the voltage of pull-up resistor R5 connection USB interfaces
Enter and hold VBUS, Q2 colelctor electrode is connected the reset terminal of control unit with pull-up resistor R5 connecting node.When control unit is normal
During operation, the control terminal of control unit output pwm signal to first switch pipe Q1, the low level in pwm signal causes Q1 to turn off,
USB charges for C1；High level in pwm signal causes Q1 to turn on, and C1 is discharged by Q1 switch ways；By adjusting PWM letters
Number dutycycle so that in the presence of pwm signal, the voltage on charging capacitor C1 is unable to reach second switch pipe Q2's all the time
Conducting voltage, second switch pipe Q2 are off state, second switch pipe Q2 colelctor electrode and pull-up resistor R5 connection all the time
It is high level at node, that is, sends invalid high level signal to the reset terminal of control unit, control unit and do not reset.Work as control
When there is abnormal crash in unit, control unit can not output pwm signal, first switch pipe Q1 base voltage passes through resistance R1 quilts
It is charging through voltage input end VBUS, charging resistor R3 to draw as low level, first switch pipe Q1 shut-off, the electric current that USB is provided
Electric capacity C1 charges, and the voltage on C1 gradually rises, and when the voltage on C1 reaches second switch pipe Q2 conducting voltage, second opens
Pipe Q2 conductings are closed, switch ways of the electric current that USB is provided through voltage input end VBUS, R5, second switch pipe Q2 flow into ground；Q2's
Colelctor electrode sends effective low level reset signal to control unit with being low level at pull-up resistor R5 connecting node
Reset terminal, control unit reset.
The hardware reset circuit of the present embodiment, using USB interface and two switching tubes, when control unit crashes by inserting
Enter USB and realize hardware reset function, resetted without using physical button, solve conventional RESET circuit and rely on physical button
The problem of reset, structure perforate caused by due to resetting physical button is avoided, reduces the perforate on the shell of circuit, reduced
Electrostatic and water enter the path of circuit through perforate, reduce the risk of electrostatic and water inlet, improve the security of circuit and steady
It is qualitative, service life is extended, reduces maintenance cost, improves user experience；Moreover, the hardware reset of the present embodiment
Circuit control mode is fairly simple, easy to use；It is simple in construction, be easy to implement, cost is relatively low, easy to utilize.
The present embodiment also proposed a kind of electronic product, including shell, and described hardware reset electricity is provided with shell
Road, USB are connected through the USB interface of shell and hardware reset circuit, and electric energy is provided for the voltage input end of USB interface.
By designing described hardware reset circuit on electronic product, using USB interface and two switching tubes, controlling
Unit realizes the hardware reset function of electronic product by inserting USB when crashing, resetted, avoided without using physical button
Due to the perforate of shell mechanism caused by physical button, product electrostatic and water inlet risk are reduced, realizes more preferable product protection,
The security of product is improved, is increased the service life, improves user experience, improves product competitiveness.
Certainly, it is to be also not limited to the example above to limitation of the present utility model, the utility model that described above, which is not,
The variations, modifications, additions or substitutions that those skilled in the art are made in essential scope of the present utility model,
Also the scope of protection of the utility model should be belonged to.
Claims (10)
- A kind of 1. hardware reset circuit, it is characterised in that：Including control unit, first switch pipe, second switch pipe, charging electricity Appearance, charging resistor, USB interface；The output end output pwm signal of described control unit controls the first switch to the control terminal of the first switch pipe The break-make of pipe；One end of the switch ways of the first switch pipe connects the control terminal of the second switch pipe, and by described Charging capacitor is grounded；The other end ground connection of the switch ways of the first switch pipe；The voltage input end of the USB interface is charged by the charging resistor for the charging capacitor；The voltage input end It is grounded by the switch ways of the second switch pipe；Wherein one end of the switch ways of the second switch pipe sends reset signal to the reset terminal of described control unit.
- 2. hardware reset circuit according to claim 1, it is characterised in that：The first switch pipe is NMOS tube, described The output end of the grid connection described control unit of first switch pipe, and pass through resistance eutral grounding；The source electrode of the first switch pipe Ground connection, the drain electrode of the first switch pipe connects the control terminal of the second switch pipe, and is grounded by the charging capacitor.
- 3. hardware reset circuit according to claim 1, it is characterised in that：The second switch pipe is NMOS tube, described The grid of second switch pipe connects one end of the switch ways of the first switch pipe；The voltage input end is grounded by the switch ways of the second switch pipe, the drain/source of the second switch pipe Reset signal is sent to the reset terminal of described control unit.
- 4. hardware reset circuit according to claim 3, it is characterised in that：Described in the drain electrode connection of the second switch pipe Voltage input end, the source electrode of the second switch pipe are grounded by pull down resistor, the source electrode of the second switch pipe with it is described under The reset terminal of the connecting node connection described control unit of pull-up resistor.
- 5. hardware reset circuit according to claim 3, it is characterised in that：The source ground of the second switch pipe, institute State the drain electrode of second switch pipe and the voltage input end connected by pull-up resistor, the drain electrode of the second switch pipe with it is described on The reset terminal of the connecting node connection described control unit of pull-up resistor.
- 6. hardware reset circuit according to claim 1, it is characterised in that：The first switch pipe is NPN triode, institute The output end of the base stage connection described control unit of first switch pipe is stated, and passes through resistance eutral grounding；The hair of the first switch pipe Emitter grounding, the colelctor electrode of the first switch pipe connects the control terminal of the second switch pipe, and passes through the charging capacitor Ground connection.
- 7. hardware reset circuit according to claim 1, it is characterised in that：The second switch pipe is NPN triode, institute State one end of the switch ways of the base stage connection first switch pipe of second switch pipe；The voltage input end is grounded by the switch ways of the second switch pipe, colelctor electrode/hair of the second switch pipe Emitter-base bandgap grading sends reset signal to the reset terminal of described control unit.
- 8. hardware reset circuit according to claim 7, it is characterised in that：The colelctor electrode connection institute of the second switch pipe State voltage input end, the emitter stage of the second switch pipe is grounded by pull down resistor, the emitter stage of the second switch pipe with The reset terminal of the connecting node connection described control unit of the pull down resistor.
- 9. hardware reset circuit according to claim 7, it is characterised in that：The grounded emitter of the second switch pipe, The colelctor electrode of the second switch pipe connects the voltage input end by pull-up resistor, the colelctor electrode of the second switch pipe with The reset terminal of the connecting node connection described control unit of the pull-up resistor.
- A kind of 10. electronic product, it is characterised in that：Including shell, set in the shell and appoint just like in claim 1 to 9 Hardware reset circuit described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720311299.1U CN206640560U (en) | 2017-03-28 | 2017-03-28 | A kind of hardware reset circuit and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720311299.1U CN206640560U (en) | 2017-03-28 | 2017-03-28 | A kind of hardware reset circuit and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206640560U true CN206640560U (en) | 2017-11-14 |
Family
ID=60259218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720311299.1U Withdrawn - After Issue CN206640560U (en) | 2017-03-28 | 2017-03-28 | A kind of hardware reset circuit and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206640560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849921A (en) * | 2017-03-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of hardware reset circuit and electronic product |
| CN112615610A (en) * | 2020-12-03 | 2021-04-06 | 北京紫光安芯科技有限公司 | Door lock system and reset circuit thereof |
-
2017
- 2017-03-28 CN CN201720311299.1U patent/CN206640560U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849921A (en) * | 2017-03-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of hardware reset circuit and electronic product |
| CN106849921B (en) * | 2017-03-28 | 2023-08-04 | 歌尔科技有限公司 | Hardware reset circuit and electronic product |
| CN112615610A (en) * | 2020-12-03 | 2021-04-06 | 北京紫光安芯科技有限公司 | Door lock system and reset circuit thereof |
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