CN103929155B - Pulse width broadening circuit - Google Patents
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- CN103929155B CN103929155B CN201410181436.5A CN201410181436A CN103929155B CN 103929155 B CN103929155 B CN 103929155B CN 201410181436 A CN201410181436 A CN 201410181436A CN 103929155 B CN103929155 B CN 103929155B
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Abstract
A pulse width broadening circuit comprises an electronic switch, a first resistor, a second resistor, a first capacitor and a first electronic switch module, wherein the electronic switch is used for selectively conducting connection or disconnection according to the level type of a pulse input signal of a control end, the first connecting end of the electronic switch is connected with a direct-current power source through the first resistor, and is ground through the first capacitor, and the second connecting end of the electronic switch is grounded; the control end of the first electronic switch module is connected with the first connecting end of the electronic switch, the first connecting end of the first electronic switch module is connected with the second connecting end of a first signal and is further connected with the direct-current power source through the second resistor, and the second connecting end of the first electronic switch module is grounded; when the control end voltage of the first electronic switch module is smaller than the first opening voltage of the first electronic switch module, the first connecting end and the second connecting end are disconnected, and when the control end voltage of the first electronic switch module is equal to or larger than the first opening voltage, the first connecting end is connected with the second connecting end. Energy consumption and interference signals can be reduced, and the pulse signals with various pulse widths can be conveniently deployed.
Description
Technical field
The present invention relates to a kind of pulse detection field, particularly relate to a kind of pulse width and widen circuit.
Background technology
At present, the microprocessor of most electronic equipment such as television set is by poll system identification input the second connection
Port, if the prime output circuit of electronic equipment or feedback circuit send improper narrow pulse signal (such as 100
Microsecond is to the signal of the pulse width of 10 milliseconds) to microprocessor time, microprocessor would become hard to identify pulse
Signal, unless improved the polling speeds of microprocessor, but can take microprocessor major part even all resources,
Make microprocessor cannot process other work.
For improving the narrow pulse signal recognition performance of microprocessor, typically widen device by pulse width and widen
The width of narrow pulse signal, but, the circuit structure that existing pulse width widens device is complicated, can increase
The energy consumption of electronic equipment, is also easily generated the interference signals such as parasitic vibrational waveform, affects signal stabilization, and past
Toward the pulsewidth that can only widen a certain scope.
Summary of the invention
For the deficiencies in the prior art, the purpose of the present invention is intended to provide one can solve above-mentioned technical problem
Pulse width widen circuit.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of pulse width widens circuit, and it includes electrical switch, the first resistance, the second resistance, the first electricity
Hold and the first electronic switch module；Described electrical switch includes the second connection end, first connects end and for connecing
Receiving the control end of a pulse input signal, described electrical switch is for the multilevel type according to pulse input signal
Selectively turn on or end；First connection end of described electrical switch is connected always by described first resistance
Stream power supply, also by described first capacity earth, the second connection end ground connection of described electrical switch；Described
One electronic switch module includes controlling end, the first connection end and second connects end, the first electronic switch module
Control end and connect the first connection end of described electrical switch, the first connection end of described first electronic switch module
Connect one first signal second and connect end, connect described DC source, described first electricity also by the second resistance
Second connection end ground connection of sub-switch module；Described first electronic switch module presets one first cut-in voltage,
And described first cut-in voltage is less than the output voltage of above-mentioned DC source；Control when the first electronic switch module
The voltage of end processed less than described first cut-in voltage time, described first electronic switch module first connection end and
Second connects and ends between end, when the voltage controlling end of the first electronic switch module is equal to or more than described the
During one cut-in voltage, the first connection end of described first electronic switch module and second connects conducting between end,
So that described first signal second connects end output one first pulse output signals.
In one embodiment, described electrical switch is field effect transistor, when described field effect transistor is N-channel field effect
Should pipe time, described electrical switch control end, first connect end and second connect end correspond to field effect transistor
Grid, drain electrode and source electrode；When described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control of described electrical switch
End processed, the first connection end and second connect end and correspond to the grid of field effect transistor, source electrode and drain electrode.Further
Ground, described first electronic switch module is field effect transistor, when described field effect transistor is N-channel field effect transistor,
Control end, the first connection end and the second connection end of described first electronic switch module correspond to field effect transistor
Grid, drain electrode and source electrode；When described field effect transistor is P-channel field-effect transistor (PEFT) pipe, described first electrical switch
Control end, the first connection end and the second connection end of module correspond to the grid of field effect transistor, source electrode and drain electrode；
Described first cut-in voltage is the cut-in voltage of described field effect transistor.
In another embodiment, described first electronic switch module is audion, when described audion is NPN
During type audion, the control end of described first electronic switch module, the first connection end and second connect end correspondence
Base stage, collector and emitter for NPN type triode；When described audion is PNP type triode,
The control end of described first electronic switch module, the first connection end and second connect end and correspond to positive-negative-positive three pole
The base stage of pipe, emitter and collector；Described first cut-in voltage is the cut-in voltage of described audion.
Further, described first electronic switch module also includes comparator, and the outfan of described comparator is even
Connecing the base stage of described audion, in-phase end corresponds to the control end of described first electronic switch module, end of oppisite phase
Connect a reference voltage signal generating unit.
In another embodiment, described first electronic switch module is controllable accurate source of stable pressure, the first electronic cutting
Close module control end, first connect end and second connect end correspond to controllable accurate source of stable pressure reference edge,
Cathode terminal and anode tap, described first cut-in voltage is the reference voltage of described controllable accurate source of stable pressure.
Further, this pulse width is widened circuit and is also included the second electric capacity, the 3rd resistance and the second electronic cutting
Close module；The first of end described first electronic switch module of connection that controls of described second electronic switch module connects
Connecing end, also by described second capacity earth, the first connection end of described second electronic switch module connects one
Secondary signal second connects end, connects described DC source, described second electrical switch also by the 3rd resistance
Second connection end ground connection of module；Described second electronic switch module presets one second cut-in voltage, when second
When the voltage controlling end of electronic switch module is less than described second cut-in voltage, described second electrical switch mould
First connection end of block and second connects and ends between end, when the voltage controlling end of the second electronic switch module
During equal to or more than described second cut-in voltage, the first connection end and second of described second electronic switch module
Connect and turn between end, so that described secondary signal second connects end output one second pulse output signals.
Further, described second electronic switch module is field effect transistor or audion.
Further, when described field effect transistor is N-channel field effect transistor, described second electronic switch module
Control end, first connect end and second connect end correspond to the grid of field effect transistor, drain electrode and source electrode, institute
State the cut-in voltage that the second cut-in voltage is described field effect transistor；When described field effect transistor is P-channel field-effect transistor (PEFT)
Guan Shi, the control end of described second electronic switch module, the first connection end and second connect end and correspond to field effect
Should the grid of pipe, source electrode and drain electrode；Described second cut-in voltage is the cut-in voltage of described field effect transistor.
Further, when described second electronic switch module is NPN type triode, described second electronic cutting
Control end, the first connection end and the second connection end that close module correspond to the base stage of NPN type triode, current collection
Pole and emitter stage；When described audion is PNP type triode, the control of described second electronic switch module
End, the first connection end and second connect end and correspond to the base stage of PNP type triode, emitter and collector；
Described second cut-in voltage is the cut-in voltage of described audion.
Beneficial effects of the present invention is as follows:
1, the resistance of corresponding first resistance of the pulsewidth size of above-mentioned first pulse output signals is multiplied by the first electric capacity
The numerical value of capacitance gained, by selecting the first resistance and first electric capacity of suitable capacitance of suitable resistance
Obtain suitable numerical value, and allocate the relation between above-mentioned numerical value and above-mentioned first cut-in voltage, can pass through
This circuit produces the pulse output signals of various pulsewidths, so that the applicable various electronic equipments of this circuit.
As can be seen here, the present invention not only circuit is simple, advantageously reduces energy consumption and interference signal, also can be according to various
The convenient pulse signal mixing various pulsewidth simply of the demand of electronic equipment.
2, the first electronic switch module use field effect transistor, audion, audion and the combination of comparator and
Controllable accurate source of stable pressure；When using controllable accurate source of stable pressure, owing to controllable accurate source of stable pressure is by temperature drift and batch
Impact little, can make this pulse width widen circuit pulse-width regulated control more accurate.
3, above-mentioned first pulse output signals is by described second electric capacity, the 3rd resistance and the second electrical switch mould
Generating above-mentioned second pulse output signals after the process of block, described second pulse output signals is more defeated than the first pulse
The waveform going out signal has steeper rising edge and trailing edge, can preferably meet some higher to waveform requirements
Electronic equipment.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that pulse width of the present invention widens the first embodiment of circuit.
Fig. 2 is the waveform diagram that the pulse width of Fig. 1 widens some signals of circuit.
Fig. 3 is the circuit diagram that pulse width of the present invention widens the second embodiment of circuit.
Fig. 4 is the circuit diagram that pulse width of the present invention widens the 3rd embodiment of circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:
Referring to Fig. 1, a kind of pulse width for first embodiment of the invention widens circuit, its preferable embodiment party
Formula includes that field effect transistor Q4 is to field effect transistor Q6, resistance R1 to resistance R3, electric capacity C1 and electric capacity C2.
The grid of described field effect transistor Q6 is for receiving a pulse input signal LOCKN, described field effect transistor Q6
Drain electrode connect a DC source VCC by described resistance R1, also by electric capacity C1 ground connection, described field is imitated
Should the source ground of pipe Q6.The grid of described field effect transistor Q5 connects the drain electrode of described field effect transistor Q6,
The drain electrode of described field effect transistor Q5 connects described DC source VCC, described field effect by described resistance R2
The source ground of pipe Q5.The grid of described field effect transistor Q4 connects the drain electrode of described field effect transistor Q5, also
By electric capacity C2 ground connection, the drain electrode of described field effect transistor Q4 connects described DC source by resistance R3
VCC, the source ground of described field effect transistor Q4.
Please also refer to Fig. 2, below the operation principle of the present embodiment is described, wherein, in Fig. 2
Waveform V0, V1, V2, V3 are respectively the waveform of the grid voltage of field effect transistor Q6, field effect transistor Q5
The drain electrode electricity of the waveform of grid voltage, the waveform of grid voltage of field effect transistor Q4 and field effect transistor Q4
The waveform of pressure:
The high level that grid received signal is pulse input signal LOCKN when described field effect transistor Q6
Time, field effect transistor Q6 turns on, and described electric capacity C1 is discharged by field effect transistor Q6, with by electric capacity C1
Electric energy entirely discharge.
The low electricity that grid received signal saltus step is pulse input signal LOCKN when field effect transistor Q6
At ordinary times, field effect transistor Q6 cut-off so that electric capacity C1 is charged by DC source VCC by resistance R1,
And then the grid voltage of field effect transistor Q5 is gradually increased from zero, until it reaches the unlatching of field effect transistor Q5
Voltage, now, field effect transistor Q5 turns on, and electric capacity C2 is discharged by field effect transistor Q5 so that field effect
The grid voltage of pipe Q4 gradually decreases, until less than the cut-in voltage of field effect transistor Q4, and then field is imitated
Should pipe Q4 cut-off, now, the drain electrode of field effect transistor Q4 by resistance R3 and DC source VCC draw high to
High level, the drain electrode of field effect transistor Q4 is this circuit for exporting pulse output signals LOCK-BACK
Signal second connect end.
When the high electricity that the grid received signal saltus step of field effect transistor Q6 is pulse input signal LOCKN
At ordinary times, field effect transistor Q6 conducting so that electric capacity C1 is discharged by field effect transistor Q6, and then field is imitated
Should the grid voltage of pipe Q5 taper into, until less than the cut-in voltage of field effect transistor Q5, now, field
Effect pipe Q5 ends so that electric capacity C2 is charged by DC source VCC by resistance R2, and then makes
The grid voltage of field effect transistor Q4 becomes larger, until it reaches the cut-in voltage of field effect transistor Q4, now
Field effect transistor Q4 turns on so that the signal of this circuit second connects end and is pulled low, and starts to export pulse output letter
The low level of number LOCK-BACK.
From foregoing circuit structure and working principle, field effect transistor Q6 plays the effect of electrical switch, field
Grid, drain electrode and the source electrode of effect pipe Q6 corresponds to the control end of electrical switch, the first connection end and second even
Connecing end, described electrical switch selectively turns on according to the multilevel type of pulse input signal or ends.Such as,
When described electrical switch is P-channel field-effect transistor (PEFT) pipe, it is according to the conducting of low level correspondence or the cut-off of high level correspondence.
When described electrical switch is N-channel field effect transistor, it is according to the conducting of high level correspondence or the cut-off of low level correspondence.
Wherein, the charge constant of electric capacity C1 is R*C, and wherein, R is the resistance of resistance R1, C
For the capacitance of electric capacity C1, correspondence the width that pulse input signal is widened can be regulated by adjusting the numerical value of R*C
Degree, adjusts debugging convenient and simple, is suitable for and widens various required pulse width.
In the present embodiment, field effect transistor Q5 and field effect transistor Q4 all play the effect of electronic switch module,
Such as, in the present embodiment, field effect transistor Q5 is as the first electronic switch module, the grid of field effect transistor Q5
Pole, drain electrode and source electrode correspond to the control end of the first electronic switch module, the first connection end and second connects end,
First electronic switch module presets one first cut-in voltage, and described first cut-in voltage is less than above-mentioned unidirectional current
The output voltage of source VCC, when the voltage controlling end of the first electronic switch module opens electricity less than described first
During pressure, the first connection end of described first electronic switch module and second connects and ends between end, when the first electricity
When the voltage controlling end of sub-switch module is equal to or more than described first cut-in voltage, described first electronic cutting
The the first connection end and second closing module connects conducting between end, thus is exported by the drain electrode of field effect transistor Q5
First pulse output signals.
Field effect transistor Q4 is as the second electronic switch module, the grid of field effect transistor Q4, drain electrode and source electrode
Correspond to the control end of the second electronic switch module, the first connection end and second connects end, the second electrical switch
Module presets one second cut-in voltage, and the output that described second cut-in voltage is less than above-mentioned DC source VCC
Voltage, when the voltage controlling end of the second electronic switch module is less than described second cut-in voltage, described the
First connection end of two electronic switch module and second connects and ends, when the second electronic switch module between end
When the voltage of control end is equal to or more than described second cut-in voltage, the first of described second electronic switch module
Connect end and second and connect conducting between end, thus export the second pulse by the drain electrode of field effect transistor Q4 and export
Signal, wherein, this second pulse output signals is to widen circuit through the pulse width of the present embodiment to carry out arteries and veins
Rush the pulse output signals after width is widened, can outwards export (such as, output detects to MCU).
In the present embodiment, field effect transistor Q4 to field effect transistor Q6 all uses N-channel field effect transistor, but can
With understand, field effect transistor Q4 to field effect transistor Q6 is used as P-channel field-effect transistor (PEFT) pipe, has no effect on it
Implementation result.Such as, when field effect transistor Q6 (electrical switch) uses as P-channel field-effect transistor (PEFT) pipe, described
Electrical switch control end, first connect end and second connect end correspond to the grid of field effect transistor, source electrode and
Drain electrode.In like manner, if field effect transistor Q4 to field effect transistor Q5 uses P-channel field-effect transistor (PEFT) pipe, corresponding company
Connect relation the most such.
It addition, described field effect transistor Q4 is to field effect transistor Q6 the most replaceable one-tenth audion, positive-negative-positive or NPN
Type audion, has no effect on its implementation result.
It should be understood that in the present embodiment, resistance R3, field effect transistor Q4 and electric capacity C2 can make arteries and veins
The waveform rushing output signal LOCK_BACK has steeper rising edge and trailing edge.In other embodiments,
If the highest to waveform requirements, removable resistance R3, field effect transistor Q4 and electric capacity C2, then pulse output signals
LOCK_BACK directly exports from the drain electrode of field effect transistor Q5, may be output to MCU and detects.
It addition, widen circuit through the pulse width of the present embodiment to carry out the output of the pulse after pulse width is widened
Signal LOCK_BACK (i.e. being exported by the drain electrode of field effect transistor Q4) and pulse input signal LOCKN
It is anti-phase；If it is straight from the drain electrode of field effect transistor Q5 after removing resistance R3, field effect transistor Q4 and electric capacity C2
Connect pulse output signals LOCK_BACK of output then with pulse input signal LOCKN homophase, if desired
Waveform is anti-phase, field effect transistor Q6 can change into P-channel field-effect transistor (PEFT) pipe or add one-level negative circuit, will be from
Pulse output signals LOCK_BACK of the drain electrode of field effect transistor Q5 directly output is passed through after negative circuit again
Outwards output.
Referring to Fig. 3, a kind of pulse width for second embodiment of the invention widens circuit, its circuit structure with
It is essentially identical that pulse width shown in Fig. 1 widens circuit structure, no, the pulse width of the present embodiment
Above-mentioned first electronic switch module widening circuit uses audion Q5 ', comparator U0 and reference voltage to generate
Unit (can be made up of DC source and some resistance, the reference voltage that such as the present embodiment generates is 2.5V)
Field effect transistor Q5 of alternative embodiment one, the in-phase end 1 of comparator U0 corresponds to the first electronic switch module
Control end, the end of oppisite phase 2 of comparator U0 connects described reference voltage signal generating unit, and comparator U0's is defeated
Go out the base stage of the end 3 described triode Q5 ' of connection.In the present embodiment, described audion Q5 ' is NPN type
During audion, the first connection end of described first electronic switch module and second connects end and corresponds to triode Q5 '
Collector and emitter；During it should be understood that this described audion Q5 ' is alternatively PNP type triode,
First connection end of described first electronic switch module and second connects end and corresponds to the transmitting of PNP type triode
Pole and colelctor electrode.The pulse width of the present embodiment is widened circuit and is capable of the pulse width with first embodiment
Widen the beneficial effect that circuit is consistent.And the present embodiment increases a voltage comparator in the front end of triode Q5 '
U0 so that circuit is unlikely to be affected by other factors such as temperature and cause the reference voltage compared to have on a large scale
Fluctuate and cause the wide variation widening multiple.
Seeing Fig. 4, a kind of pulse width for the fourth embodiment of the present invention widens circuit, its circuit structure with
It is essentially identical that the pulse width of the first embodiment shown in Fig. 1 widens circuit, and except for the difference that, the present embodiment is adopted
Field effect transistor Q5 is replaced as above-mentioned first electronic switch module with controllable accurate source of stable pressure U5.Above-mentioned first
Control end, the first connection end and the second connection end of electronic switch module correspond to controllable accurate source of stable pressure U5's
Reference edge R, cathode terminal K and anode tap A.When controllable accurate source of stable pressure U5 reference edge R voltage (i.e.
Voltage for electric capacity C1) less than controllable accurate source of stable pressure U5 reference voltage such as 2.5 volts (correspondence electronics
The positive cut-in voltage of switch module) time, between the cathode terminal K and anode tap A of controllable accurate source of stable pressure U5
Cut-off, when the voltage of the reference edge R of controllable accurate source of stable pressure U5 equals to or more than controllable accurate source of stable pressure U5
Reference voltage time, between the cathode terminal K and anode tap A of controllable accurate source of stable pressure U5 turn on.Due to can
Control precision voltage regulator U5 is affected little by temperature drift and batch, therefore, the most above-mentioned field effect transistor Q5, employing can
The pulse-width regulated that control precision voltage regulator U5 can make this pulse width widen circuit controls more accurate.In this enforcement
In example, the controllable accurate source of stable pressure chip that controllable accurate source of stable pressure U5 can use model to be TL431.It addition,
The DC source VCC of the present embodiment can not be less than 2.5V, VCC and be preferred more than or equal to 3.3V, preferably 5V.
It should be understood that in the present invention, except the circuit arrived mentioned by above-described embodiment 1～embodiment 4
Outside structure, every possess above-mentioned electrical switch or the components and parts of electronic switch module function or circuit module is the suitableeest
Using this circuit, this is no longer going to repeat them.
In sum, beneficial effects of the present invention is as follows:
1, the resistance of corresponding first resistance of the pulsewidth size of above-mentioned first pulse output signals is multiplied by the first electric capacity
The numerical value of capacitance gained, the first electric capacity of the first resistance and suitable capacitance by selecting suitable resistance can obtain
Obtain suitable numerical value, and allocate the relation between above-mentioned numerical value and above-mentioned first cut-in voltage, can be by this
Circuit produces the pulse output signals of various pulsewidths, so that the applicable various electronic equipments of this circuit.By
This is visible, and the present invention not only circuit is simple, advantageously reduces energy consumption and interference signal, also can be according to various electricity
The convenient pulse signal mixing various pulsewidth simply of the demand of subset.
2, the first electronic switch module use field effect transistor, audion, audion and the combination of comparator and
During controllable accurate source of stable pressure；When using controllable accurate source of stable pressure, owing to controllable accurate source of stable pressure by temperature drift and is criticized
Secondary impact is little, and the pulse-width regulated that this pulse width can be made to widen circuit controls more accurate.
3, above-mentioned first pulse output signals is by described second electric capacity, the 3rd resistance and the second electrical switch mould
Generating above-mentioned second pulse output signals after the process of block, described second pulse output signals is more defeated than the first pulse
The waveform going out signal has steeper rising edge and trailing edge, can preferably meet some higher to waveform requirements
Electronic equipment.
For a person skilled in the art, can technical scheme as described above and design, make
Other various corresponding changes and deformation, and all these changes and deformation all should belong to present invention power
Within the protection domain that profit requires.
Claims (9)
1. a pulse width widens circuit, it is characterised in that: include electrical switch, the first resistance, second
Resistance, the first electric capacity and the first electronic switch module；
Described electrical switch includes the first connection end, second connects end and for receiving a pulse input signal
Controlling end, described electrical switch is for selectively turning on according to the multilevel type of pulse input signal or ending；
First connection end of described electrical switch connects a DC source by described first resistance, also by described the
One capacity earth, the second connection end ground connection of described electrical switch；
Described first electronic switch module includes controlling end, the first connection end and second connects end, the first electronics
The end that controls of switch module connects the first connection end of described electrical switch, described first electronic switch module
First connects end connection one first signal second connects end, connects described DC source also by the second resistance,
Second connection end ground connection of described first electronic switch module；Described first electronic switch module presets one first
Cut-in voltage, and described first cut-in voltage is less than the output voltage of described DC source；
When the voltage controlling end of the first electronic switch module is less than described first cut-in voltage, described first
First connection end of electronic switch module and second connects and ends, when the control of the first electronic switch module between end
When the voltage of end processed is equal to or more than described first cut-in voltage, the first of described first electronic switch module is even
Connect end to connect with second and turn between end so that described first signal second to connect end output one first pulse defeated
Go out signal.
2. pulse width as claimed in claim 1 widens circuit, it is characterised in that: described electrical switch is
Field effect transistor or audion, when described electrical switch is N-channel field effect transistor, the control of described electrical switch
End processed, the first connection end and second connect end and correspond to the grid of field effect transistor, drain electrode and source electrode；When described
When field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described electrical switch, the first connection end and second are even
Connect end and correspond to the grid of field effect transistor, source electrode and drain electrode；When described electrical switch is NPN type triode,
Described electrical switch control end, first connect end and second connect end correspond to NPN type triode base stage,
Collector and emitter；When described audion is PNP type triode, the control end of described electrical switch,
First connection end and second connects end and corresponds to the base stage of PNP type triode, emitter and collector.
3. pulse width as claimed in claim 1 or 2 widens circuit, it is characterised in that: described first electricity
Sub-switch module is field effect transistor, when described field effect transistor is N-channel field effect transistor, and described first electronics
Switch module control end, first connect end and second connect end correspond to the grid of field effect transistor, drain electrode and
Source electrode；When described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described first electronic switch module,
First connection end and second connects end and corresponds to the grid of field effect transistor, source electrode and drain electrode；Described first opens
Voltage is the cut-in voltage of described field effect transistor.
4. pulse width as claimed in claim 1 or 2 widens circuit, it is characterised in that: described first electricity
Sub-switch module is made up of audion, comparator and reference voltage unit, and the outfan of described comparator connects
The base stage of described audion, in-phase end corresponds to the control end of described first electronic switch module, and end of oppisite phase is even
Connect described reference voltage unit, when described audion is NPN type triode, described first electrical switch mould
First connection end of block and second connects end and corresponds to the collector and emitter of NPN type triode；When described
When audion is PNP type triode, the first connection end of described first electronic switch module and second connects end
Correspond to the emitter and collector of PNP type triode；Described first cut-in voltage is opening of described audion
Open voltage.
5. pulse width as claimed in claim 1 or 2 widens circuit, it is characterised in that: described first electricity
Sub-switch module is controllable accurate source of stable pressure, the control end of the first electronic switch module, first connects end and the
Two connect end corresponds to the reference edge of controllable accurate source of stable pressure, cathode terminal and anode tap, and described first opens electricity
Pressure is the reference voltage of described controllable accurate source of stable pressure.
6. pulse width as claimed in claim 1 widens circuit, it is characterised in that: also include the second electric capacity,
3rd resistance and the second electronic switch module；The control end of described second electronic switch module connects described first
First connection end of electronic switch module, also by described second capacity earth, described second electrical switch mould
First connection end of block connects a secondary signal second and connects end, connects described unidirectional current also by the 3rd resistance
Source, the second connection end ground connection of described second electronic switch module；Described second electronic switch module presets one
Second cut-in voltage, when the voltage controlling end of the second electronic switch module is less than described second cut-in voltage,
First connection end of described second electronic switch module and second connects and ends, when the second electrical switch between end
When the voltage controlling end of module is equal to or more than described second cut-in voltage, described second electronic switch module
The first connection end and second connect and turn between end, so that described secondary signal second connects end output 1 the
Two pulse output signals.
7. pulse width as claimed in claim 6 widens circuit, it is characterised in that: described second electronic cutting
Closing module is field effect transistor or audion.
8. pulse width as claimed in claim 7 widens circuit, it is characterised in that: when described second electronics
When switch module is N-channel field effect transistor, the control end of described second electronic switch module, the first connection end
Connecting end with second and correspond to the grid of field effect transistor, drain electrode and source electrode, described second cut-in voltage is described N
The cut-in voltage of channel field-effect pipe；When described field effect transistor is P-channel field-effect transistor (PEFT) pipe, described second electricity
Control end, the first connection end and the second connection end of sub-switch module correspond to the grid of field effect transistor, source electrode
And drain electrode, described second cut-in voltage is the cut-in voltage of described P-channel field-effect transistor (PEFT) pipe.
9. pulse width as claimed in claim 7 widens circuit, it is characterised in that: when described second electronics
When switch module is NPN type triode, the control end of described second electronic switch module, first connect end and
Second connects end corresponds to the base stage of NPN type triode, collector and emitter；When described audion is PNP
During type audion, the control end of described second electronic switch module, the first connection end and second connect end correspondence
Base stage, emitter and collector for PNP type triode；Described second cut-in voltage is described audion
Cut-in voltage.
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| CN201410181436.5A CN103929155B (en) | 2014-04-30 | 2014-04-30 | Pulse width broadening circuit |
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| CN201410181436.5A CN103929155B (en) | 2014-04-30 | 2014-04-30 | Pulse width broadening circuit |
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| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN108666972B (en) * | 2017-04-01 | 2024-04-19 | 苏州益而益电器制造有限公司 | Leakage protector |
| CN106408815B (en) * | 2016-12-01 | 2020-05-19 | 蔡春良 | Vibration accumulation alarm method and device |
| CN107272485A (en) * | 2017-06-16 | 2017-10-20 | 中国科学院苏州生物医学工程技术研究所 | A kind of pulse signal acquisition device and method based on low speed ADC |
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| CN101061549A (en) * | 2002-12-02 | 2007-10-24 | 爱特梅尔股份有限公司 | System and method for expanding a pulse width |
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| US6346841B2 (en) * | 1998-06-29 | 2002-02-12 | Hyundai Electronics Industries Co., Ltd. | Pulse generator |
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| US4578597A (en) * | 1982-03-05 | 1986-03-25 | Sony Corporation | Large amplitude pulse generating circuits |
| CN101061549A (en) * | 2002-12-02 | 2007-10-24 | 爱特梅尔股份有限公司 | System and method for expanding a pulse width |
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| CN103929155A (en) | 2014-07-16 |
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