CN209462355U - Time-delay reset circuit and electronic equipment - Google Patents
Time-delay reset circuit and electronic equipment Download PDFInfo
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- CN209462355U CN209462355U CN201920167771.8U CN201920167771U CN209462355U CN 209462355 U CN209462355 U CN 209462355U CN 201920167771 U CN201920167771 U CN 201920167771U CN 209462355 U CN209462355 U CN 209462355U
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Abstract
A kind of time-delay reset circuit and electronic equipment, time-delay reset circuit is connected between reset signal input terminal and control chip, including first resistor, one diode, first capacitor, first triode and the second triode, the first end of the first resistor, the cathode of the diode is connect with the reset signal input terminal, the second end of the first resistor is connect with the first end of the base stage of first triode and the first capacitor, the second end of the first capacitor is grounded, the emitter of first triode is grounded, the collector of first triode is connect with the base stage of second triode, the emitter of second triode is grounded, the collector of second triode is connect with the reset pin of the control chip.It charges to first capacitor, the first triode ON when first capacitor voltage reaches the first transistor base conducting voltage, moment opens the second triode, and the reset pin for controlling chip is pulled low to 0 level, and time-delay reset function is realized.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of time-delay reset circuit and electronic equipment.
Background technique
The development advanced by leaps and bounds with electronic technology is seen everywhere the production of the electronics such as intelligent machine, Baffle Box of Bluetooth, bluetooth headset
Product can not wherein power off between the electronic system and battery of a big chunk electronic product, this causes electronic product when crashing
It can not be resetted by power-off means.Restart to reset electronic product when crashing, it is necessary to add special multiple
Position circuit, usually adding reset circuit has following several schemes: 1, separate physical key switch resets；2, by reset chip,
It is resetted using power button；3, software reset.
For the first scheme, product structure is needed additionally to open reset hole, this affects the whole of electronic product on the one hand
It is external to see, and additional switch key is needed to increase cost, particularly with some products for securing structure in advance, this scheme is more
It is infeasible.It is scheme used in current most of electronic products, due to scheme mature and reliable, quilt for second scheme
Most of electronic products uses, but needs to increase additional reset chip, considerably increases the hardware cost of electronic product.The
Three kinds of schemes are usually that the form of WATCHDOG is used in software code, when electronic product crashes, place certain time, are
System will restart, although this scheme inexpensively allows user at one's wit's end in face of crashing, largely effect on user experience.
Utility model content
In view of this, the utility model embodiment provides a kind of time-delay reset circuit and electronic equipment, it is intended to solve to pass
The problem of at high cost present in the reset circuit of system, poor user experience.
The first aspect of the utility model embodiment provides a kind of time-delay reset circuit, is connected to reset signal input terminal
Between control chip, comprising: first resistor, a diode, first capacitor, the first triode and the second triode, in which:
The first end of the first resistor, the diode cathode connect with the reset signal input terminal, described
The second end of one resistance is connect with the first end of the base stage of first triode and the first capacitor, the first capacitor
Second end ground connection, the emitter ground connection of first triode, the collector of first triode and second triode
Base stage connection, the emitter ground connection of second triode, the collector of second triode and the control chip
Reset pin connection.
It in one of the embodiments, further include the second capacitor, current collection of second capacitance connection in the first triode
Between pole and the base stage of second triode.
It in one of the embodiments, further include second resistance, the first end of the second resistance and the two or three pole
The base stage of pipe connects, second end ground connection.
It in one of the embodiments, further include third capacitor, the first end of the third capacitor and the two or three pole
The collector of pipe connects, second end ground connection.
It in one of the embodiments, further include 3rd resistor, the 3rd resistor is connected to power supply and the second triode
Collector between.
The reset signal input terminal is the input terminal or output end of charging circuit in one of the embodiments,.
The control chip includes Bluetooth chip or single-chip microcontroller in one of the embodiments,.
The second aspect of the utility model embodiment provides a kind of electronic equipment, including control chip and above-mentioned delay
Reset circuit.
Above-mentioned time-delay reset circuit is charged by first resistor to first capacitor, and first capacitor voltage reaches the one or three pole
First triode ON when pipe base-on voltage, moment open the second triode, and the reset pin for controlling chip is pulled low to 0
Level, time-delay reset function are realized.In addition, diode enables first capacitor repid discharge, delay time length can pass through
First capacitor is adjusted, and delay time is directly proportional to the capacitance of first capacitor, in this way, just by discrete device simple, at low cost
It is able to achieve the reset to control chip, promotes user experience, and can make delay multiple to capacitor repid discharge by diode
Position circuit being capable of fast quick-recovery.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the circuit diagram for the time-delay reset circuit that the utility model first embodiment provides；
Fig. 2 is the circuit diagram for the time-delay reset circuit that the utility model second embodiment provides；
Fig. 3 is the circuit diagram for the time-delay reset circuit that the utility model 3rd embodiment provides；
Fig. 4 is the circuit diagram for the time-delay reset circuit that the utility model fourth embodiment provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to Fig. 1, a kind of time-delay reset circuit that can be used for electronic equipment that an embodiment of the present invention provides, prolongs
When reset circuit be connected between reset signal input terminal 11 and the control chip 12 of electronic equipment, time-delay reset circuit includes the
One resistance R1, a diode D1, first capacitor C1, the first triode Q1 and the second triode Q2.
The first end of first resistor R1, the diode D1 cathode connect with the reset signal input terminal 11, it is described
The second end of first resistor R1 is connect with the first end of the base stage of the first triode Q1 and the first capacitor C1, and described
The second end of one capacitor C1 is grounded, the emitter ground connection of the first triode Q1, the collector of the first triode Q1 with
The base stage of the second triode Q2 connects, the emitter ground connection of the second triode Q2, the collection of the second triode Q2
Electrode is connect with the reset pin of the control chip 12.
The reset signal input terminal 11 is the input terminal or output end of charging circuit in one of the embodiments,.With
For the input terminal of charging circuit, for example, electronic equipment USB interface positive pole, when charging to electronic equipment, USB is connect
The positive pole of mouth gives first capacitor C1 to charge by first resistor R1, and first capacitor C1 voltage reaches the first triode Q1 base stage
The first triode Q1 is connected when conducting voltage, and moment opens the second triode Q2, and the reset pin of control chip 12 is pulled low to 0
Level, time-delay reset function are realized.In addition, diode D1 enables first capacitor C1 repid discharge, delay time length can be with
It is adjusted by first capacitor C1, delay time is directly proportional to the capacitance of first capacitor C1, in this way, just by simple discrete device
It is able to achieve the reset to control chip 12, and time-delay reset circuit can be enabled to capacitor repid discharge by diode D1
Fast quick-recovery.
In one of the embodiments, referring to Fig. 2, time-delay reset circuit further includes the second capacitor C2, second electricity
Hold C2 to be connected between the collector of the first triode Q1 and the base stage of the second triode Q2.Second capacitor C2 is multiple in delay
Position circuit plays the role of when not working breaking, opens the second triode Q2 for generating burst signal at work, is promoted
Drive the ability of the second triode Q2.
In one of the embodiments, referring to Fig. 3, time-delay reset circuit further includes second resistance R2, second electricity
The first end of resistance R2 is connect with the base stage of the second triode Q2, second end ground connection.Second resistance R2 is for dividing.
In one of the embodiments, referring to Fig. 4, time-delay reset circuit further includes third capacitor C3, the third electricity
The first end for holding C3 is connect with the collector of the second triode Q2, second end ground connection.Time-delay reset circuit further includes third
Resistance R3, the 3rd resistor R3 are connected between power supply VCC and the collector of the second triode Q2.Third capacitor C3 is being delayed
Power supply VCC is played when reset circuit does not work to charge to it, so that the reset pin of the control chip 12 is placed in high level, is located
Working normally non-reset state.
The control chip 12 is Bluetooth chip in one of the embodiments,.In other embodiments, the control core
Piece 12 can also be single-chip microcontroller, CPU etc..
In one embodiment, the positive pole of USB interface is filled by first resistor R1 to first capacitor C1 (100uF)
Electricity, the first triode when the capacitance voltage of first capacitor C1 reaches the first triode Q1 base-on voltage about 0.7V after about 1.5S
Q1 conducting, moment open the second triode Q2, and the reset pin of control chip 12 is pulled low to 0 level, 18mS is about when dragging down
5mS needed for reset of the left and right much larger than control chip 12, time-delay reset function realize that time-delay reset function is realized.In addition, two
Pole pipe D1 enables first capacitor C1 repid discharge, and delay time length can be adjusted by first capacitor C1, delay time with
The capacitance of first capacitor C1 is directly proportional, in this way, the reset to control chip 12 can be achieved with by simple discrete device, and
The fast quick-recovery of time-delay reset circuit can be enabled to capacitor repid discharge by diode D1.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (8)
1. a kind of time-delay reset circuit is connected between reset signal input terminal and control chip characterized by comprising the
One resistance, a diode, first capacitor, the first triode and the second triode, in which:
The first end of the first resistor, the diode cathode connect with the reset signal input terminal, it is described first electricity
The second end of resistance is connect with the first end of the base stage of first triode and the first capacitor, and the second of the first capacitor
End ground connection, the emitter ground connection of first triode, the base of the collector of first triode and second triode
Pole connection, the emitter ground connection of second triode, the reset of the collector of second triode and the control chip
Pin connection.
2. time-delay reset circuit as described in claim 1, which is characterized in that further include the second capacitor, second capacitor connects
It connects between the collector of the first triode and the base stage of second triode.
3. time-delay reset circuit as described in claim 1, which is characterized in that it further include second resistance, the second resistance
First end is connect with the base stage of second triode, second end ground connection.
4. time-delay reset circuit as described in claim 1, which is characterized in that it further include third capacitor, the third capacitor
First end is connect with the collector of second triode, second end ground connection.
5. time-delay reset circuit as described in claim 1 or 4, which is characterized in that it further include 3rd resistor, the 3rd resistor
It is connected between power supply and the collector of the second triode.
6. time-delay reset circuit as described in claim 1, which is characterized in that the reset signal input terminal is charging circuit
Input terminal or output end.
7. time-delay reset circuit as described in claim 1, which is characterized in that the control chip includes Bluetooth chip or monolithic
Machine.
8. a kind of electronic equipment, including control chip, which is characterized in that multiple including the described in any item delays of claim 1 to 7
Position circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167771.8U CN209462355U (en) | 2019-01-30 | 2019-01-30 | Time-delay reset circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167771.8U CN209462355U (en) | 2019-01-30 | 2019-01-30 | Time-delay reset circuit and electronic equipment |
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| Publication Number | Publication Date |
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| CN209462355U true CN209462355U (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920167771.8U Active CN209462355U (en) | 2019-01-30 | 2019-01-30 | Time-delay reset circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781872A (en) * | 2020-06-30 | 2020-10-16 | 山东信通电子股份有限公司 | Power-on reset circuit and method of chip |
| CN112234966A (en) * | 2020-11-03 | 2021-01-15 | 深圳佑驾创新科技有限公司 | Reset circuit |
-
2019
- 2019-01-30 CN CN201920167771.8U patent/CN209462355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781872A (en) * | 2020-06-30 | 2020-10-16 | 山东信通电子股份有限公司 | Power-on reset circuit and method of chip |
| CN112234966A (en) * | 2020-11-03 | 2021-01-15 | 深圳佑驾创新科技有限公司 | Reset circuit |
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