CN206673931U - A kind of on-off circuit and the electronic product with on-off circuit - Google Patents
A kind of on-off circuit and the electronic product with on-off circuit Download PDFInfo
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- CN206673931U CN206673931U CN201720440021.4U CN201720440021U CN206673931U CN 206673931 U CN206673931 U CN 206673931U CN 201720440021 U CN201720440021 U CN 201720440021U CN 206673931 U CN206673931 U CN 206673931U
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- triode
- circuit
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- colelctor electrode
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Abstract
The utility model discloses a kind of on-off circuit and the electronic product with on-off circuit, an including NPN type triode, the base stage of the triode receive control signal, and colelctor electrode receives power supply, grounded emitter or connection power cathode；Bridging has electric capacity between the colelctor electrode of the triode and base stage, and the base stage of the triode is grounded or connected power cathode by continued flow resistance, passes through the colelctor electrode output pulse signal of the triode.The utility model is in the on-off circuit using triode design by increasing electric capacity and continued flow resistance, acted on using the charge-trapping effect and the afterflow of continued flow resistance of electric capacity, the quick on-off control to triode is realized, the operating frequency requirements of some load circuits for requiring high-frequency impulse can be met.By accelerating the break-make speed of triode, shorten duration of the triode operation in amplification region, it is possible thereby to largely reduce the power consumption of triode, extend the service life of triode.
Description
Technical field
The utility model belongs to on-off circuit technical field, is related to a kind of transistor switching circuit.Specifically, it is to be related to
A kind of circuit design of on-off circuit that can accelerate triode break-make speed and the electronics based on on-off circuit design
Product.
Background technology
On-off circuit is a kind of electronic circuit with " on " and "off" two states, and its output signal has two kinds
Level state, using the level signal of both states of its output, the working condition or working frequency of load can be realized
Control or regulation.
With the increasingly quickening of signaling rate, the requirement of various chips and circuit for frequency characteristic is also increasingly
Height, this is just proposed for influence chip and the on-off circuit of the frequency characteristic of circuit to the break-make speed of on-off circuit
Higher requirement.For example, during certain a blue tooth products is developed, when carrying out performance test to product, send out sometimes
Vibrating motor in existing blue tooth productses does not always reach defined vibration frequency.What the vibration frequency of vibrating motor was received by it
The dutycycle of pwm signal determines, measures discovery to the dutycycle of pwm signal, the waveform of pwm signal is during switching
There is certain delay.Through analysis, main cause is to generate the on-off circuit generally use triode structure of the pwm signal,
Triode can not switch in time in make and break process, cause PWM waveform not steady enough.
In addition, triode is being changed into saturation conduction state from cut-off state or is being changed into ending from saturation conduction state
The transition period of state, because triode operation is in amplification region, therefore the time of triode on off operating mode change is longer, circuit
Power consumption is bigger, not only influences the service behaviour of circuit system, and the temperature of triode can be caused too high, shortens triode
Service life.
The content of the invention
The utility model proposes a kind of structure design of on-off circuit based on triode, can not only accelerate triode
Break-make speed, meet the frequency requirement of load circuit works, and can largely reduce the power consumption of triode, extend
The service life of triode.
In order to solve the above technical problems, the utility model is achieved using following technical scheme：
On the one hand, the utility model proposes a kind of on-off circuit, including a NPN type triode, the base of the triode
Pole receives control signal, and colelctor electrode receives power supply, grounded emitter or connection power cathode；In the collection of the triode
Bridging has electric capacity between electrode and base stage, and the base stage of the triode is grounded or connected power cathode by continued flow resistance, leads to
Cross the colelctor electrode output pulse signal of the triode.
Further, the colelctor electrode of the triode connects described power supply by current-limiting resistance.
Further, the base stage of the triode connects the input of the control signal by current-limiting resistance.
Preferably, the capacitance of electric capacity value preferably between 0.47 μ F-1 μ F；The resistance of the continued flow resistance is excellent
It is selected in the following values of 1K Ω.
On the other hand, the utility model also proposed a kind of electronic product with on-off circuit, including control circuit and
Load circuit, the control circuit output are used for the control signal for controlling the on-off circuit break-make；The load circuit receives
The pulse signal of the on-off circuit output；Wherein, a NPN type triode, three pole are provided with the on-off circuit
The base stage of pipe receives the control signal of the control circuit output, and colelctor electrode receives power supply, grounded emitter or
Connect power cathode；Bridging has electric capacity between the colelctor electrode of the triode and base stage, and the base stage of the triode, which passes through, to continue
Leakage resistance is grounded or connection power cathode, the colelctor electrode of the triode connect the load circuit, export described pulse
Signal.
Further, when the electronic product is bluetooth earphone or Baffle Box of Bluetooth, the control circuit can be bluetooth
Microprocessor in earphone or Baffle Box of Bluetooth, the load circuit can be the vibrating motors in bluetooth earphone or Baffle Box of Bluetooth,
The pulse signal that the vibrating motor receives according to it adjusts its vibration frequency.
In order to realize reliable driving to the vibrating motor, driving electricity can also be further set in the load circuit
Road, receives the pulse signal of on-off circuit output, and after improving the load capacity of the pulse signal, exports to described
Vibrating motor.
Compared with prior art, the advantages of the utility model and good effect is：The utility model is set using triode
By increasing electric capacity and continued flow resistance in the on-off circuit of meter, acted on using the charge-trapping of electric capacity, and coordinate continued flow resistance
Afterflow acts on, and realizes the quick on-off control to triode, can meet the work of some load circuits for requiring high-frequency impulse
Working frequency requirement.By accelerating the break-make speed of triode, shorten duration of the triode operation in amplification region, it is possible thereby to very
The power consumption of triode is reduced in big degree, extends the service life of triode.On-off circuit of the present utility model, design is simple,
It is cheap, save cost, highly effective.
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 a kind of circuit theory diagrams of on-off circuit based on triode design；
Fig. 2 is a kind of circuit theory diagrams of the embodiment for the on-off circuit that the utility model is proposed；
Fig. 3 is a kind of schematic block circuit diagram of embodiment of the blue tooth productses based on the design of on-off circuit shown in Fig. 2.
Embodiment
Specific embodiment of the present utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is the on-off circuit based on a NPN type triode Q1 design.In figure, INPUT is control signal input,
The control signal for controlling triode Q1 break-makes is received, and the control signal is transmitted to triode Q1 base stage, to change
Become triode Q1 on off operating mode.Can connect limit between the base stage of the triode Q1 and control signal input INPUT
Leakage resistance R1, triode Q1 grounded emitter or connection power cathode, colelctor electrode are powered electric by current-limiting resistance R2 connections
Source VCC.Change triode Q1 break-makes using control signal, you can produce the arteries and veins of low and high level saltus step in triode Q1 colelctor electrode
Rush signal, such as the adjustable pwm signal of dutycycle.The pwm signal is transmitted to successive load by output end OUTPUT, just
Control can be realized to the frequency of loaded work piece.
On-off circuit shown in Fig. 1, it is high electric when being increased to by the control signal that input INPUT is received by low level
Usually, triode Q1 collector current increases, and then triode Q1 is changed from cut-off region → amplification region → saturation region, most
Triode Q1 is set to be changed into saturation conduction state from cut-off state eventually.It is changed into saturation conduction state from cut-off state in triode Q1
During, the growth of triode Q1 collector current all provides by power supply VCC.Pass through input INPUT conversely, working as
When the control signal received is changed into low level from high level, triode Q1 changes from saturation region → amplification region → cut-off region, and
Eventually become off state.
In order to accelerate triode Q1 break-make speed, the present embodiment bridges electricity between triode Q1 base stage and colelctor electrode
Hold C1, and triode Q1 base stage is grounded or connected power cathode by continued flow resistance R3, as shown in Figure 2.In switch electricity
After electric capacity C1 and continued flow resistance R3 is added in road, power supply VCC, current-limiting resistance R2, electric capacity C1, continued flow resistance R3 and system
Ground（Or power cathode）Just a loop is constituted.When the control signal received by input INPUT is low level,
Power supply VCC charges for electric capacity C1, and the current potential at electric capacity C1 and current-limiting resistance R2 tie point is VCC.Pass through input
The control signal that INPUT is received from low level to high level change when, due to triode Q1 base potential raise, cause electricity
Hold C1 to discharge to triode Q1 colelctor electrode, so, triode Q1 collector current increases, and sub-fraction is carried by electric capacity C1
Supply, remainder is provided by power supply VCC, thus can then be added with accelerating the growth rate of collector current
Fast triode Q1 is from the change procedure by the end of saturation conduction state.
When triode Q1 is switched to saturation conduction state, the polarity of voltage reversion at electric capacity C1 both ends, about VBE-
VCEsat=0.7V-0.3V=0.4V.Wherein, VBEThe voltage between base stage and emitter stage for triode Q1；VCEsatFor triode Q1
Voltage during saturation conduction between its colelctor electrode and emitter stage.
When being changed into low level from high level by the control signal that input INPUT is received, due to triode Q1's
Base voltage declines, and collector voltage rises, and colelctor electrode charges to electric capacity C1, so as to cause triode Q1 colelctor electrode and transmitting
Electric current between pole declines more quickly, coordinates continued flow resistance R3 afterflow effect, triode Q1 can be made to enter more quickly
Cut-off state, thus just accelerate triode Q1 turn-off speed.
It can be seen that the present embodiment coordinates electric capacity C1 and continued flow resistance R3 structure on-off circuits using triode Q1, electric capacity is utilized
C1 charge-trapping effect, and coordinate the afterflow of continued flow resistance to act on, realize the quick on-off control to triode Q1.Due to
Triode Q1 break-make speed is accelerated, and then makes the waveform by the output end OUTPUT pulse signals exported in handoff procedure
Delay reduce, impulse waveform is steady, so as to greatly improve the frequency characteristic of output end, can preferably meet load circuit
To the design requirement of working frequency.
In the present embodiment, the actual requirement that the capacitance of the electric capacity C1 can be according to load circuit to its working frequency
Selection determination, the present embodiment value preferably between 0.47 μ F-1 μ F, and frequency requirement is faster, electric capacity value is smaller.And for
Continued flow resistance R3 resistance, preferably below K levels, i.e., the resistance less than 1K Ω, to accelerate the velocity of discharge.The afterflow of the present embodiment
Resistance R3, its resistance value preferably between 100 Ω -1K Ω.
Industrial applicibility
The on-off circuit of the present embodiment is applied in electronic product, it is provided for some load circuits in electronic product
Required high-frequency pulse signal, to meet the operating frequency requirements of these load circuits.
The present embodiment is with blue tooth productses（For example, bluetooth earphone or Baffle Box of Bluetooth etc.）Exemplified by illustrate, such as Fig. 3 institutes
Show.The on-off circuit of the present embodiment is laid on the pcb board of blue tooth productses, provided for the vibrating motor in product needed for it
Pulse signal.
The blue tooth productses of the present embodiment, it is main to include using Micro-processor MCV as the control circuit of core and by the MCU
Bluetooth antenna module, key control module, indicating module, power amplifier module and vibrating motor of control etc..By the switch shown in Fig. 2
Circuit is applied in the blue tooth productses, can be specifically connected to the control signal input INPUT of on-off circuit described
Control circuit, such as Micro-processor MCV, receive the control signal for being used to control triode Q1 break-makes of control circuit output.Will
The output end OUTPUT of on-off circuit shown in Fig. 2 is connected to the load circuit for needing return pulse signal, such as vibrating motor
Or vibrating motor is connected by drive circuit, to control the vibration frequency of vibrating motor.
When needing to control blue tooth productses vibration, MCU output control signals control triode Q1 quick on-offs, vibration is produced
The pulse signal of vibration frequency needed for motor, after the load capacity that the pulse signal is lifted via drive circuit, transmit to institute
Vibrating motor is stated, to control vibrating motor to vibrate.
Because triode Q1 break-make speed is accelerated, therefore the waveform stabilization of caused pulse signal, then to shake
The vibration frequency of dynamic motor can meet the design requirement of product well.
It is well known that power consumption of the triode in cut-off region and saturation region is minimum, and the power consumption in amplification region is maximum, and reason is
In cut-off region VCEGreatly, ICEIt is minimum, in saturation region ICEGreatly, VCEVery little (is equal to saturation conduction voltage VCEsat)；And it is in amplification region
Big voltage high-current, i.e. VCE、ICEIt is very big.Therefore, the make and break process for accelerating triode Q1 is exactly to make triode Q1 quick
Pass through big power consumption area (linear amplification region) and enter low power consumption area (cut-off region and saturation region), so as to reduce on triode Q1
Power consumption, reduce triode Q1 temperature rise, play a part of extending triode Q1 service lifes.
Certainly, the on-off circuit of the present embodiment can also be applied needs high-frequency impulse to believe in other in addition to blue tooth productses
Number load circuit or electronic product in, to meet the requirement of its working frequency, the present embodiment is to this without concrete restriction.
It should be pointed out that it is that limitation of the present utility model, the utility model are also not limited to that described above, which is not,
The example above, change that those skilled in the art are made in essential scope of the present utility model, retrofit, add
Add or replace, should also belong to the scope of protection of the utility model.
Claims (10)
1. a kind of on-off circuit, is characterised by, including a NPN type triode, the base stage of the triode receives control signal, collection
Electrode receives power supply, grounded emitter or connection power cathode；In the colelctor electrode and the span of base stage of the triode
Electric capacity is connected to, the base stage of the triode is grounded or connected power cathode by continued flow resistance, passes through the collection of the triode
Electrode output pulse signal.
2. on-off circuit according to claim 1, it is characterised in that the colelctor electrode of the triode is connected by current-limiting resistance
Connect described power supply.
3. on-off circuit according to claim 1, it is characterised in that the base stage of the triode is connected by current-limiting resistance
The input of the control signal.
4. on-off circuit according to any one of claim 1 to 3, it is characterised in that the capacitance of the electric capacity exists
Value between 0.47 μ F-1 μ F；The resistance of the continued flow resistance is below 1K Ω.
5. a kind of electronic product with on-off circuit, including：
Control circuit, it exports the control signal for controlling the on-off circuit break-make；
Load circuit, it receives the pulse signal of the on-off circuit output；
Characterized in that, being provided with a NPN type triode in the on-off circuit, the base stage of the triode receives the control
The control signal of circuit output processed, colelctor electrode receive power supply, grounded emitter or connection power cathode；Described
Bridging has electric capacity between the colelctor electrode and base stage of triode, and the base stage of the triode is grounded or connected electricity by continued flow resistance
Source negative pole, the colelctor electrode of the triode connect the load circuit, export described pulse signal.
6. the electronic product according to claim 5 with on-off circuit, it is characterised in that the colelctor electrode of the triode
Pass through the described power supply of current-limiting resistance connection.
7. the electronic product according to claim 5 with on-off circuit, it is characterised in that the base stage of the triode is led to
Cross the described control circuit of current-limiting resistance connection.
8. the electronic product with on-off circuit according to any one of claim 5 to 7, it is characterised in that the electricity
The capacitance of appearance value between 0.47 μ F-1 μ F；The resistance of the continued flow resistance is below 1K Ω.
9. the electronic product with on-off circuit according to any one of claim 5 to 7, it is characterised in that the electricity
Sub- product is bluetooth earphone or Baffle Box of Bluetooth, and the control circuit is microprocessor, and the load circuit includes vibrating motor, institute
State the pulse signal that vibrating motor receives according to it and adjust its vibration frequency.
10. the electronic product according to claim 9 with on-off circuit, it is characterised in that in the load circuit
Also include drive circuit, receive the pulse signal of on-off circuit output, and after improving the load capacity of the pulse signal,
Export to described vibrating motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720440021.4U CN206673931U (en) | 2017-04-25 | 2017-04-25 | A kind of on-off circuit and the electronic product with on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720440021.4U CN206673931U (en) | 2017-04-25 | 2017-04-25 | A kind of on-off circuit and the electronic product with on-off circuit |
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| CN206673931U true CN206673931U (en) | 2017-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720440021.4U Active CN206673931U (en) | 2017-04-25 | 2017-04-25 | A kind of on-off circuit and the electronic product with on-off circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312962A (en) * | 2018-01-16 | 2018-07-24 | 安徽航途智能科技有限公司 | A kind of automotive natural gas leakage monitoring device |
-
2017
- 2017-04-25 CN CN201720440021.4U patent/CN206673931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312962A (en) * | 2018-01-16 | 2018-07-24 | 安徽航途智能科技有限公司 | A kind of automotive natural gas leakage monitoring device |
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