CN109004824A - Signal output control circuit - Google Patents
Signal output control circuit Download PDFInfo
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- CN109004824A CN109004824A CN201810813612.0A CN201810813612A CN109004824A CN 109004824 A CN109004824 A CN 109004824A CN 201810813612 A CN201810813612 A CN 201810813612A CN 109004824 A CN109004824 A CN 109004824A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The embodiment of the present invention provides a kind of signal output control circuit, comprising: booster circuit and photo-coupler；The input terminal of booster circuit is connected for receiving two-way pulse duration frequency signal, the output end of booster circuit and the power pin of photo-coupler；If booster circuit is used to confirm the opposite in phase between two-way pulse duration frequency signal, boost voltage is exported；The input anode of photo-coupler is for receiving input signal, and the input cathode of photo-coupler is for receiving two-way pulse duration frequency signal after being added, and the output end of photo-coupler is for exporting output signal corresponding with input signal.Signal output control circuit provided in an embodiment of the present invention, the opposite in phase of pulse duration frequency signal is able to confirm that in terms of using booster circuit and photo-coupler two, it ensure that the process of acquisition data is errorless, to guarantee that the signal of output is safety signal, improve the safety and reliability of system operation.
Description
Technical field
The present embodiments relate to signal control fields, more particularly, to a kind of signal output control circuit.
Background technique
In field of track traffic, usually there are a variety of data handling procedures.Data handling procedure may include following steps: first
Data are acquired first with acquisition device, above-mentioned data may include temperature data, speed data and acceleration information etc. with
Rail traffic runs relevant parameter；It is then based on the data collected to make decisions, and corresponding based on court verdict driving
Executing agency carry out certain movement, above-mentioned executing agency may include motor.In the related technology, realize driving executing agency into
The control circuit that action is made typically directly is based on court verdict and generates corresponding signal, and signal is exported to next link, with
Drive executing agency's movement.But there may be exception or other mistakes for the data due to collecting itself, lead to output
Signal is non-security signal, is had an impact to the safety and reliability of whole system.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the present invention provides one kind and overcomes the above problem or at least be partially solved
State the signal output control circuit of problem.
The embodiment of the present invention provides a kind of signal output control circuit, which includes: that the input terminal of booster circuit is used for
Two-way pulse duration frequency signal is received, the output end of booster circuit and the power pin of photo-coupler connect；If booster circuit is used for
Confirm the opposite in phase between two-way pulse duration frequency signal, then exports boost voltage；The input anode of photo-coupler is for receiving
Input signal, the input cathode of photo-coupler is for receiving two-way pulse duration frequency signal after being added, the output end of photo-coupler
For exporting output signal corresponding with input signal.
Signal output control circuit provided in an embodiment of the present invention, by booster circuit confirm two-way pulse duration frequency signal it
Between opposite in phase after, to photo-coupler export boost voltage, ensure that the phase phase of two-way pulse duration frequency signal on the one hand
Instead；And when by opposite in phase of the photo-coupler itself only between two-way frequency signal, corresponding output could be exported
Signal ensure that the opposite in phase of two-way pulse duration frequency signal on the other hand.Therefore, arteries and veins is able to confirm that using above-mentioned two aspect
The opposite in phase for rushing frequency signal ensure that the process of acquisition data is errorless, so that the signal for guaranteeing output is safety signal, mention
The high safety and reliability of system operation.
It should be understood that above general description and following detailed description be it is exemplary and explanatory, can not
Limit the embodiment of the present invention.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the structural schematic diagram of signal output control circuit provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
After acquisition device acquires data, corresponding analogue data can be generated.And contain one in primary circuit in the related technology
A device, can (analogue data be generated by the data that acquire all the way, and another way can be preset simulation to two-way analogue data
Data) it is compared, and two-way rp pulse frequency signal can be generated respectively.Then, primary circuit can be based on two-way rp pulse
Frequency signal generates corresponding signal and is input to next link.But there may be different for the data due to collecting itself
Normal or other mistakes, leading to the signal of output is non-security signal, is had an impact to the safety and reliability of whole system.
Based on this, Fig. 1 is the structural schematic diagram of signal output control circuit provided in an embodiment of the present invention, as shown in Figure 1,
It include: booster circuit and photo-coupler；The input terminal of booster circuit for receiving two-way pulse duration frequency signal, booster circuit it is defeated
Outlet and the power pin of photo-coupler connect；If booster circuit is used to confirm the phase phase between two-way pulse duration frequency signal
Instead, then boost voltage is exported；The input anode of photo-coupler is for receiving input signal, and the input cathode of photo-coupler is for connecing
Two-way pulse duration frequency signal after being added is received, the output end of photo-coupler is for exporting output signal corresponding with input signal.
Specifically, since two-way pulse duration frequency signal is that the process based on front-end collection data is generated, if adopting
The process for collecting data is errorless or the data itself that collect are errorless, then the two-way pulse frequency generated should be reverse phase.
Therefore, if two-way pulse duration frequency signal is not complete reverse phase, it can be determined that two-way pulse duration frequency signal is abnormal signal, into
It is abnormal that one step can determine that the process of front-end collection data exists, thus cannot be based on two-way pulse duration frequency signal come to next link
(such as driving executing agency is acted) output signal.
Based on the above principles, above-mentioned booster circuit can be (as shown in Figure 1 based on received two-way pulse duration frequency signal
PULSE_INVERTER and PULSE) come determine two-way pulse duration frequency signal whether reverse phase.As long as should be noted that two-way arteries and veins
Rushing frequency signal not is complete reverse phase, and booster circuit will not all determine the opposite in phase between two-way pulse duration frequency signal, thus
Boost voltage will not be provided to photo-coupler (U1A as shown in Figure 1), and photo-coupler is in the feelings for being not provided with boost voltage
It will not be worked normally under condition.
The power pin of photo-coupler is the 6th pin VCC as shown in Figure 1, the input of photo-coupler just extremely the 1st pin
1DA, the input cathode of photo-coupler are the 2nd pin 1DK, and the output end of photo-coupler is the 7th pin OUT.Photo-coupler it is defeated
Entering the received input signal of positive institute can be to enable clock signal (CLK_1MHz as shown in Figure 1), the embodiment of the present invention pair
The concrete type of input signal is not construed as limiting.The output signal of optocoupler output output should be corresponding with input signal, example
EN_CLK signal such as corresponding with enabled clock signal clk _ 1MHz.
The working principle of photo-coupler is as follows: the input anode and input cathode of photo-coupler are separately connected light emitting diode
Anode and cathode, when photo-coupler input anode level be greater than photo-coupler input cathode level when, shine two
Pole pipe conducting.Light-sensitive element inside photo-coupler can be such that the output end of photo-coupler exports based on shining for light emitting diode
Corresponding output signal.Working principle and connection relationship based on above-mentioned photo-coupler it is found that in specific work process,
Booster circuit provides boost voltage for photo-coupler, i.e., in the case where offer power supply, photo-coupler has following two work feelings
Condition: if the complete reverse phase of two-way pulse duration frequency signal, i.e., two-way pulse duration frequency signal after being added is 0, then then photo-coupler
The level for inputting cathode is 0, then level of the level certainly less than input anode of cathode is inputted, so that photo-coupler can be normal
Work, photo-coupler can export corresponding output signal；If the incomplete reverse phase of two-way pulse duration frequency signal, i.e., after being added two
Road pulse duration frequency signal is not 0, then then the level of the input cathode of photo-coupler is not 0, then the level for inputting cathode is not small
In the level of input anode, so that photo-coupler can not normally export corresponding output signal.
Therefore, principle based on above-mentioned booster circuit and photo-coupler it is found that signal output control circuit to two-way pulse
Whether frequency signal is that having following two layers for opposite in phase determines: first layer judgement is realized by booster circuit, i.e., only two
When opposite in phase between the frequency signal of road, boost voltage just is exported to photo-coupler, i.e. offer power supply；The second layer determines by light
The working principle of coupler itself determines, i.e., when opposite in phase only between two-way frequency signal, could export accordingly
Output signal.
Signal output control circuit provided in an embodiment of the present invention, by booster circuit confirm two-way pulse duration frequency signal it
Between opposite in phase after, to photo-coupler export boost voltage, ensure that the phase phase of two-way pulse duration frequency signal on the one hand
Instead；And when by opposite in phase of the photo-coupler itself only between two-way frequency signal, corresponding output could be exported
Signal ensure that the opposite in phase of two-way pulse duration frequency signal on the other hand.Therefore, arteries and veins is able to confirm that using above-mentioned two aspect
The opposite in phase for rushing frequency signal ensure that the process of acquisition data is errorless, so that the signal for guaranteeing output is safety signal, mention
The high safety and reliability of system operation.
Content based on the above embodiment, as a kind of alternative embodiment, two-way pulse duration frequency signal includes the first pulse
Frequency signal and the second pulse duration frequency signal；Correspondingly, booster circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, first diode
And third capacitor；The drain electrode of first metal-oxide-semiconductor is connect with power supply, and the grid of the first metal-oxide-semiconductor is for receiving the first pulse frequency
Signal, the source electrode of the first metal-oxide-semiconductor are connect with the drain electrode of the second metal-oxide-semiconductor, and the grid of the second metal-oxide-semiconductor is for receiving the second pulse frequency
Signal, the source electrode ground connection of the second metal-oxide-semiconductor；The drain electrode of first metal-oxide-semiconductor and the anode of first diode connect, and first diode is born
Pole is connect by third capacitor with the source electrode of the first metal-oxide-semiconductor, and the cathode of first diode and the power pin of photo-coupler connect.
Content based on the above embodiment, as a kind of alternative embodiment, booster circuit further includes first resistor and second
Resistance；First resistor is connected with second resistance, and the drain electrode of the first metal-oxide-semiconductor is connected by first resistor and second resistance and power supply
It connects.
As shown in Figure 1, the first pulse duration frequency signal is PULSE_INVERTER, the second pulse duration frequency signal is PULSE, the
One metal-oxide-semiconductor is Q1, and the second metal-oxide-semiconductor is Q2, and first diode D1, third capacitor is C3, power supply VDD, first resistor
For R1, second resistance R2.
Based on above-mentioned connection relationship, the working principle of booster circuit is as follows: being first shut off the first metal-oxide-semiconductor Q1, opens second
Metal-oxide-semiconductor Q2, voltage VDD (voltage of power supply) are by first resistor R1, second resistance R2 and first diode D1 to third
Capacitor C3 charging；Then, the first metal-oxide-semiconductor Q1 is opened, closes the second metal-oxide-semiconductor Q2, voltage VDD is by first resistor R1, the second electricity
Hinder R2 and the first metal-oxide-semiconductor Q1, superposition third capacitor C3 charging after voltage, obtain boost voltage V_rise (as voltage VDD with
The sum of the voltage of third capacitor C3)；Boost voltage is input to photo-coupler later.
It first charges to third capacitor C3 to guarantee to default, then exports boost voltage, content based on the above embodiment is made
For a kind of alternative embodiment, booster circuit further includes 3rd resistor and pull down resistor；The grid and 3rd resistor of second metal-oxide-semiconductor connect
It connects, the grid of the second metal-oxide-semiconductor is used to receive the second pulse duration frequency signal, one end of pull down resistor and second by 3rd resistor
The grid of metal-oxide-semiconductor connects, the other end ground connection of pull down resistor.As shown in Figure 1,3rd resistor is R3, pull down resistor R4.
Specifically, the first metal-oxide-semiconductor Q1 can be P-channel enhancement type metal-oxide-semiconductor, and turn-on condition is that grid potential is lower than source electrode
Current potential；First metal-oxide-semiconductor Q1 can be the enhanced metal-oxide-semiconductor of N-channel, and turn-on condition is that grid potential is higher than source potential.Due to
The grid of second metal-oxide-semiconductor Q2 receives the second pulse duration frequency signal by 3rd resistor R3, and the source electrode of the second metal-oxide-semiconductor is grounded, therefore,
The grid potential of second metal-oxide-semiconductor Q2 is naturally larger than source potential, and the second metal-oxide-semiconductor should be in an open state.And due to the first metal-oxide-semiconductor Q1
Grid directly receive the first pulse duration frequency signal, the grid of the second metal-oxide-semiconductor Q2 receives the second pulse frequency by 3rd resistor R3
Rate signal, therefore, the grid voltage of the first metal-oxide-semiconductor Q1 are naturally larger than the grid voltage of the second metal-oxide-semiconductor Q2, i.e. the first metal-oxide-semiconductor Q1
Grid voltage be naturally larger than the source voltage of the first metal-oxide-semiconductor Q1, therefore, the first metal-oxide-semiconductor Q1 should be in off state.
Based on the above principles, it can be realized and be first shut off the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 is opened, to third capacitor C3
Charging.And due to the level change and reverse phase of the first pulse duration frequency signal and the second pulse duration frequency signal, to third capacitor C3
After charging or after third capacitor C3 charging complete, source electrode electricity of the grid voltage of the first metal-oxide-semiconductor Q1 less than the first metal-oxide-semiconductor Q1
The state conversion of pressure, the first metal-oxide-semiconductor Q1 is in an open state；Source electrode of the grid voltage of second metal-oxide-semiconductor Q1 less than the second metal-oxide-semiconductor Q1
The state of voltage, the second metal-oxide-semiconductor Q2 is converted to close off state.Based on this, above-mentioned first metal-oxide-semiconductor and the second metal-oxide-semiconductor can be realized
The process of opening and closing.
It, can if should be noted that the first pulse duration frequency signal and the second pulse duration frequency signal and non-fully reverse phase
Lead to the premature opening state for entering the first metal-oxide-semiconductor Q1, the closed state of the second metal-oxide-semiconductor Q2 causes third capacitor C3 to charge
Time is insufficient, causes boost voltage too low, optocoupler can not be made to work normally, so that booster circuit be made to can be realized confirmation two-way arteries and veins
After rushing the opposite in phase between frequency signal, the function of boost voltage is exported.
Signal output control circuit provided in an embodiment of the present invention can be controlled based on the connection relationship between each component
The sequencing of metal-oxide-semiconductor switch, realization generate in the case where the first pulse duration frequency signal and the second pulse duration frequency signal reverse phase
Boost voltage provides working power for photo-coupler.
Content based on the above embodiment, as a kind of alternative embodiment, booster circuit further includes the second diode, first
Capacitor and the second capacitor；The cathode of first diode is connect with the anode of the second diode, the cathode and optocoupler of the second diode
The power pin of clutch connects；First capacitor is in parallel with the second capacitor, one end and confession of one end of first capacitor and the second capacitor
The other end of power supply connection, the other end of first capacitor and the second capacitor is connect with the cathode of the second diode.Such as Fig. 1 institute
Show, the second diode is D2, and first capacitor C1, the second capacitor is C2.Specifically, boost voltage V_rise passes through the two or two pole
Pipe D2 is output to photo-coupler.The effect that first capacitor is C1 and the second capacitor is C2 is filtering, removes burr.
Content based on the above embodiment, as a kind of alternative embodiment, the ground pin of photo-coupler connects power supply,
The output end of photo-coupler and next Absent measures circuit connection.Specifically, as shown in Figure 1, the ground pin of photo-coupler is the 5th
Pin GND connects VDD.Due to boost voltage V_rise be the sum of voltage VDD and capacitance voltage, the reality of photo-coupler
Operating voltage is capacitance voltage.Based on above-mentioned setting, if the first pulse duration frequency signal and the second pulse duration frequency signal are not complete
Be all-trans phase, then will lead to that capacitor charging time is short, and capacitance voltage is too low, photo-coupler can not be made to work normally, so as to reality
If the opposite in phase between existing booster circuit confirmation two-way pulse duration frequency signal, exports the function of boost voltage.
Content based on the above embodiment, as a kind of alternative embodiment, signal output control circuit further includes the 5th electricity
Resistance and the 6th resistance；First pulse duration frequency signal is input to the input anode of photo-coupler, the second pulse frequency by the 5th resistance
Rate signal is input to the input anode of photo-coupler by the 6th resistance.As shown in Figure 1, the 5th resistance is R4, the 6th resistance is
R6。
Content based on the above embodiment, as a kind of alternative embodiment, signal output control circuit further includes the 4th electricity
Hold；One end of 4th capacitor is connect with the input anode of the 5th resistance, the 6th resistance and photo-coupler respectively, the 4th capacitor it is another
One end ground connection.As shown in Figure 1, the 4th capacitor is C4, the effect of the 4th capacitor C4 is filtering, removes burr.
Content based on the above embodiment, as a kind of alternative embodiment, booster circuit includes single-chip microcontroller and DC-DC boosting
Circuit；If single-chip microcontroller is used to confirm the opposite in phase between received two-way pulse duration frequency signal, DC-DC booster circuit is controlled
Boost voltage is provided to photo-coupler, and for being input to photo-coupler according to two-way pulse duration frequency signal after being added control
Input cathode level value.
Content based on the above embodiment, as a kind of alternative embodiment, booster circuit includes field programmable logic device
Part and DC-DC booster circuit；If field programmable logic device is used to confirm the phase between received two-way pulse duration frequency signal
Position provides boost voltage to photo-coupler on the contrary, then controlling DC-DC booster circuit, and for according to two-way pulse after being added
Frequency signal control is input to the level value of the input cathode of photo-coupler.
Specifically, the function of above-mentioned DC-DC booster circuit is only to provide a boost voltage, itself cannot be such as above-mentioned reality
The booster circuit for applying example offer is the same, can be to the phase difference between the first pulse duration frequency signal and the second pulse duration frequency signal
Judged.And above-mentioned deterministic process is realized by single-chip microcontroller or field programmable logic device.Also, the input of photo-coupler is negative
The level value of pole can equally be directly controlled by single-chip microcontroller or field programmable logic device, such as judge the first pulse frequency
After signal and the second pulse duration frequency signal opposite in phase, 0 level can be directly inputted.It is understood that single-chip microcontroller or scene can
Programmed logic device can also directly determine whether the sum of two pulse signals are that 0 this specific mode confirms the first pulse frequency
Signal and the second pulse duration frequency signal whether opposite in phase.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of signal output control circuit characterized by comprising booster circuit and photo-coupler；
The input terminal of the booster circuit is for receiving two-way pulse duration frequency signal, the output end of the booster circuit and the light
The power pin of coupler connects；If the booster circuit is used to confirm the phase phase between the two-way pulse duration frequency signal
Instead, then boost voltage is exported；
The input anode of the photo-coupler is added for receiving input signal, the input cathode of the photo-coupler for receiving
The two-way pulse duration frequency signal afterwards, the output end of the photo-coupler is for exporting output corresponding with the input signal
Signal.
2. signal output control circuit according to claim 1, which is characterized in that the two-way pulse duration frequency signal includes
First pulse duration frequency signal and the second pulse duration frequency signal；Correspondingly, the booster circuit includes the first metal-oxide-semiconductor, the 2nd MOS
Pipe, first diode and third capacitor；
The drain electrode of first metal-oxide-semiconductor is connect with power supply, and the grid of first metal-oxide-semiconductor is for receiving first pulse
Frequency signal, the source electrode of first metal-oxide-semiconductor are connect with the drain electrode of second metal-oxide-semiconductor, and the grid of second metal-oxide-semiconductor is used for
Receive second pulse duration frequency signal, the source electrode ground connection of second metal-oxide-semiconductor；
The drain electrode of first metal-oxide-semiconductor is connect with the anode of the first diode, and the cathode of the first diode passes through institute
It states third capacitor to connect with the source electrode of first metal-oxide-semiconductor, the power supply of the cathode of the first diode and the photo-coupler
Pin connection.
3. signal output control circuit according to claim 2, which is characterized in that the booster circuit further includes the first electricity
Resistance and second resistance；
The first resistor is connected with the second resistance, and the drain electrode of first metal-oxide-semiconductor passes through the first resistor and described
Second resistance is connect with the power supply.
4. signal output control circuit according to claim 2, which is characterized in that the booster circuit further includes third electricity
Resistance and pull down resistor；
The grid of second metal-oxide-semiconductor is connect with the 3rd resistor, and the grid of second metal-oxide-semiconductor is for passing through the third
Resistance receives second pulse duration frequency signal, and one end of the pull down resistor is connect with the grid of second metal-oxide-semiconductor, described
The other end of pull down resistor is grounded.
5. signal output control circuit according to claim 2, which is characterized in that the booster circuit further includes the two or two
Pole pipe, first capacitor and the second capacitor；
The anode of the cathode of the first diode and second diode is connect, the cathode of second diode with it is described
The power pin of photo-coupler connects；
The first capacitor is in parallel with second capacitor, one end and institute of one end of the first capacitor and second capacitor
Power supply connection is stated, the other end and second diode of the other end of the first capacitor and second capacitor are born
Pole connection.
6. signal output control circuit according to any one of claims 2 to 5, which is characterized in that the photo-coupler
Ground pin connects the power supply, the output end of the photo-coupler and next Absent measures circuit connection.
7. signal output control circuit according to claim 6, which is characterized in that further include the 5th resistance and the 6th electricity
Resistance；
First pulse duration frequency signal is positive by the input that the 5th resistance is input to the photo-coupler, and described second
Pulse duration frequency signal is input to the input anode of the photo-coupler by the 6th resistance.
8. signal output control circuit according to claim 7, which is characterized in that further include the 4th capacitor；
One end of 4th capacitor is positive with the input of the 5th resistance, the 6th resistance and the photo-coupler respectively
Connection, the other end ground connection of the 4th capacitor.
9. signal output control circuit according to claim 1, which is characterized in that the booster circuit include single-chip microcontroller and
DC-DC booster circuit；
If the single-chip microcontroller is used to confirm opposite in phase between the received two-way pulse duration frequency signal, control described in
DC-DC booster circuit provides the boost voltage to the photo-coupler, and for according to the two-way pulse after being added
Frequency signal control is input to the level value of the input cathode of the photo-coupler.
10. signal output control circuit according to claim 1, which is characterized in that the booster circuit includes that scene can
Programmed logic device and DC-DC booster circuit；
If the field programmable logic device is used to confirm the opposite in phase between the received two-way pulse duration frequency signal,
It then controls the DC-DC booster circuit and provides the boost voltage to the photo-coupler, and for according to institute after being added
State the level value that the control of two-way pulse duration frequency signal is input to the input cathode of the photo-coupler.
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