CN108631755B - Square wave pulse output tuning matching unit - Google Patents
Square wave pulse output tuning matching unit Download PDFInfo
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- CN108631755B CN108631755B CN201810657736.4A CN201810657736A CN108631755B CN 108631755 B CN108631755 B CN 108631755B CN 201810657736 A CN201810657736 A CN 201810657736A CN 108631755 B CN108631755 B CN 108631755B
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- power supply
- matching
- photoelectric coupler
- square wave
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- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/01—Details
- H03K3/017—Adjustment of width or dutycycle of pulses
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/018—Coupling arrangements; Interface arrangements using bipolar transistors only
- H03K19/01825—Coupling arrangements, impedance matching circuits
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
- Pulse Circuits (AREA)
Abstract
The invention provides a tuning matching unit with a full duty ratio direct current 0-30 v square wave pulse output function, which aims to solve the problems that: when the direct-current voltage is required to be output by the pulse with the fixed duty ratio, the problem of insufficient driving capability is solved, any direct-current pulse voltage signal with the duty ratio of 0-100% of direct current ranging from 0-30 v can be output by utilizing the characteristics of NPN and PNP triodes and matching with an optocoupler, and the pulse duty ratio and the frequency can be adjusted by adjusting the values of the matching resistor and the capacitor.
Description
Technical Field
The invention relates to the field of circuit control, in particular to a square wave pulse output tuning matching unit.
Background
The method is characterized in that a test is required before a host computer product of an XGZ type automatic passing phase separation control system leaves a factory, one test index is sensitivity test, a direct current square wave pulse voltage of 0-10 v is required to be input to an input end of a vehicle sensing coil of the host computer, the pulse width ratio is required to be adjusted according to actual requirements on site, an oscilloscope is initially adopted for inputting the pulse width voltage, but the vehicle sensing coil cannot generate an input signal due to insufficient driving capability when the output voltage value of the oscilloscope exceeds 10v, the test cannot be performed, programming is performed through a PLC (programmable logic controller) later, and the input is performed through a self-contained relay contact, but the relay contact is a mechanical contact and is too short in pulse output service life for a long time, so a tuning unit which has enough driving capability and can be adjusted according to requirements is required to be developed.
Disclosure of Invention
The invention relates to a tuning matching unit capable of outputting a full duty cycle square wave pulse of 0-30 v of direct current, which can output any pulse width square wave pulse direct current voltage ranging from 0 to 100% by setting an output range and adjusting values of a matching resistor and a capacitor, wherein the input range of the direct current voltage is 0-30 v.
In order to solve the technical problems, the invention aims to provide a tuning matching unit with a full duty ratio direct current 0-30 v square wave pulse output function.
The purpose of the invention is realized in the following way: the utility model provides a matching unit is tuned in square wave pulse output, includes timer chip, triode, photoelectric coupler, and its technical essential is: the tuning matching unit further comprises an external power supply terminal, a matching resistor, a matching capacitor and diodes, wherein the number of the photoelectric couplers is two, U2 and U3 are respectively arranged, the output end of a pulse signal of a timer chip is connected with the base electrode of a PNP triode Q1 through a current limiting resistor and is simultaneously connected with the base electrode of an NPN triode Q2, the emitter electrode of the PNP triode Q1 is connected with a pin 2 of the photoelectric coupler U2, a pin 1 of the photoelectric coupler U2 is connected with a signal power supply 5V+ through a current limiting resistor R3, a pin 16 of the photoelectric coupler U2 is connected with a pin 1 of an external power supply terminal CZ2, a pin 15 of the photoelectric coupler U2 is connected with a pin 2 of an external power supply output terminal CZ2, the pin 1 of the CZ2 is an input end of an external signal power supply, and the pin 2 of the CZ2 is an output end of the external signal power supply; the collector pin 1 of the NPN triode Q2 is connected with the pin 2 of the photoelectric coupler U3, the pin 1 of the photoelectric coupler U3 is connected with a signal power supply 5V+ through a current limiting resistor R4, the pin 16 of the photoelectric coupler U3 is connected with the pin 3 of an external power supply terminal CZ2, the pin 15 of the photoelectric coupler U2 is connected with the pin 4 of an external power supply output terminal CZ2, the pin 3 of the CZ2 is an input end of an external signal power supply, and the pin 4 of the CZ2 is an output end of the external signal power supply.
The invention has the advantages and beneficial effects that: the tuning matching unit with the full duty ratio direct current 0-30 v square wave pulse output function is developed by using a 555 timer chip on the basis of utilizing the square wave output characteristic of the 555 timer chip, the tuning matching unit is simple in structure, low in cost, long in service life and low in fault rate, is suitable for the application of square wave pulse input with various input voltages of 0-30 v, and improves the reliability of the testing of the XGZ type automatic passing phase-splitting control system host.
Drawings
Fig. 1 is an electrical schematic of the present invention.
Detailed Description
As shown in fig. 1, the invention relates to a square wave pulse output tuning matching unit, which comprises a timer chip, a triode and a photoelectric coupler, wherein: the tuning matching unit further comprises an external power supply terminal, a matching resistor, a matching capacitor and diodes, wherein the number of the photoelectric couplers is two, U2 and U3 are respectively arranged, the output end of a pulse signal of a timer chip is connected with the base electrode of a PNP triode Q1 through a current limiting resistor and is simultaneously connected with the base electrode of an NPN triode Q2, the emitter electrode of the PNP triode Q1 is connected with a pin 2 of the photoelectric coupler U2, a pin 1 of the photoelectric coupler U2 is connected with a signal power supply 5V+ through a current limiting resistor R3, a pin 16 of the photoelectric coupler U2 is connected with a pin 1 of an external power supply terminal CZ2, a pin 15 of the photoelectric coupler U2 is connected with a pin 2 of an external power supply output terminal CZ2, the pin 1 of the CZ2 is an input end of an external signal power supply, and the pin 2 of the CZ2 is an output end of the external signal power supply; the collector pin 1 of the NPN triode Q2 is connected with the pin 2 of the photoelectric coupler U3, the pin 1 of the photoelectric coupler U3 is connected with a signal power supply 5V+ through a current limiting resistor R4, the pin 16 of the photoelectric coupler U3 is connected with the pin 3 of an external power supply terminal CZ2, the pin 15 of the photoelectric coupler U2 is connected with the pin 4 of an external power supply output terminal CZ2, the pin 3 of the CZ2 is an input end of an external signal power supply, and the pin 4 of the CZ2 is an output end of the external signal power supply.
Further, the number of the matching resistors is two, and the number of the matching capacitors is one.
Further, one of the matching resistors is connected with the output end of the pulse signal of the timer chip through a resistor and a diode.
Further, another matching resistor is connected with one pin of the photoelectric coupler, and is connected with the matching capacitor and grounded.
Embodiment one:
the whole tuning matching unit comprises 555 timer chips, PNP triodes, photoelectric couplers, matching resistors, matching capacitors, switching relays, light emitting diodes and other components. The 555 timing chip has the characteristics that the duty ratio of an output square wave signal is only 50% -100%, and the PNP diode is used for reversing the output waveform and isolating the output waveform through the optocoupler, so that a stable square wave pulse with the duty ratio of 0% -50% which can be output at 0% -30V can be generated through the output end of the optocoupler. The tuning unit can meet the signal output of any duty ratio between 0-100% of different frequencies by setting the output range and adjusting the matching resistance and capacitance.
Referring to fig. 1, pin 3 of the NE555 timing chip U1 is an output end of a pulse signal, which is connected with the base pin 2 of the PNP triode Q1 through a current limiting resistor R2 and is connected with the base pin 2 of the NPN triode Q2.
The emitter pin 3 of the PNP triode Q1 is connected with the pin 2 of the optocoupler U2, the pin 1 of the optocoupler U2 is connected with the signal power supply 5V+ through the current limiting resistor R3, the pin 16 of the optocoupler U2 is connected with the pin 1 of the external power supply terminal CZ2, the pin 15 of the optocoupler U2 is connected with the pin 2 of the external power supply output terminal CZ2, the pin 1 of the CZ2 is the input end of the external signal power supply, and the pin 2 of the CZ2 is the output end of the external signal power supply. After the tuning unit is powered, pin 3 of the NE555 timing chip U1 outputs square wave pulses, when pin 3 is in a high level state, the base electrode of the triode Q1 is in a high level state, at this time, the emitter electrode of the triode Q1 is also in a high level state by being connected with the 5v+ power supply through the input end of the optocoupler U2, no current flows between the emitter electrode and the base electrode to be in a closed state, so that the triode is not conducted, and the input end of the optocoupler U2 is not conducted to be in a closed state; conversely, when the pin 3 is at a low level, current is generated between the emitter and the base of the triode Q1 to enable the triode to be in a conducting state, and the emitter and the collector of the triode are conducted to enable the input end of the optical coupler U2 to be conducted simultaneously, at the moment, the optical coupler is conducted, a signal power supply connected to the CZ2 through an external signal power supply output terminal can form a pulse signal power supply output opposite to the waveform of the pin 3 of the NE555 timing chip U1 according to the state of the optical coupler, and the duty ratio range is 0-50%.
The collector pin 1 of the NPN triode Q2 is connected with the pin 2 of the optocoupler U3, the pin 1 of the optocoupler U3 is connected with the signal power supply 5V+ through the current limiting resistor R4, the pin 16 of the optocoupler U3 is connected with the pin 3 of the external power supply terminal CZ2, the pin 15 of the optocoupler U2 is connected with the pin 4 of the external power supply output terminal CZ2, the pin 3 of the CZ2 is an input end of the external signal power supply, and the pin 4 of the CZ2 is an output end of the external signal power supply. After the tuning unit supplies power, pin 3 of NE555 timing chip U1 will output square wave pulse, and when pin 3 is high level, triode Q2's base is high level state, and the collector is low level state this moment, and triode Q2's base has the electric current to flow before the collecting electrode to make triode Q2 switch on, because triode Q2's collector electrode and projecting pole switch on and make optocoupler U3's input also switch on simultaneously, optocoupler switch on this moment. Conversely, when the pin 3 is at a low level, no current is generated between the base electrode and the emitter electrode of the triode Q2, the triode Q2 is not conducted, the optocoupler is also in a non-conducting state, and a signal power supply accessed into the CZ2 through an external signal power supply output terminal can form a pulse signal power supply output with the same waveform as the pin 3 of the NE555 timing chip U1 according to the state of the optocoupler, and the duty ratio range is 50-100%.
The desired duty cycle and frequency can be obtained by adjusting the RA1, RA2 and C2 value roots; for example, a square wave frequency with a duty ratio of 20% and a frequency of 100 hz is desired, an output range of 0-50% is set, a matching resistance RA1 = 8.64 kohms, RA2 = 2.88 kohms, and c2 = 1 microfarads can be calculated by a formula, and the corresponding matching resistance and capacitance values are adjusted based on the output desired pulse.
Claims (4)
1. The utility model provides a matching unit is tuned in square wave pulse output, includes timer chip, triode, photoelectric coupler, its characterized in that: the tuning matching unit further comprises an external power supply terminal CZ2, a matching resistor, a matching capacitor and a diode, wherein the number of the photoelectric couplers is two, U2 and U3 respectively, the output end of a pulse signal of a timer chip is connected with the base electrode of a PNP triode Q1 through a current limiting resistor and is simultaneously connected with the base electrode of the NPN triode Q2, the emitter electrode of the PNP triode Q1 is connected with a pin 2 of the photoelectric coupler U2, a pin 1 of the photoelectric coupler U2 is connected with a signal power supply 5V+ through a current limiting resistor R3, a pin 16 of the photoelectric coupler U2 is connected with a pin 1 of the external power supply terminal CZ2, a pin 15 of the photoelectric coupler U2 is connected with a pin 2 of the external power supply terminal CZ2, the pin 1 of the CZ2 is the input end of an external signal power supply, and the pin 2 of the CZ2 is the output end of the external signal power supply;
the collector pin 1 of the NPN triode Q2 is connected with the pin 2 of the photoelectric coupler U3, the pin 1 of the photoelectric coupler U3 is connected with a signal power supply 5V+ through a current limiting resistor R4, the pin 16 of the photoelectric coupler U3 is connected with the pin 3 of an external power supply terminal CZ2, the pin 15 of the photoelectric coupler U2 is connected with the pin 4 of the external power supply terminal CZ2, the pin 3 of the CZ2 is an input end of an external signal power supply, and the pin 4 of the CZ2 is an output end of the external signal power supply.
2. A square wave pulse output tuning matching unit as defined in claim 1, wherein: the number of the matching resistors is two, and the number of the matching capacitors is one.
3. A square wave pulse output tuning matching unit as defined in claim 2, wherein: one of the matching resistors is connected with the output end of the pulse signal of the timer chip through a resistor and a diode.
4. A square wave pulse output tuning matching unit as defined in claim 2, wherein: the other matching resistor is connected with one pin of the timer chip, and is connected with the matching capacitor and grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810657736.4A CN108631755B (en) | 2018-06-25 | 2018-06-25 | Square wave pulse output tuning matching unit |
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| CN201810657736.4A CN108631755B (en) | 2018-06-25 | 2018-06-25 | Square wave pulse output tuning matching unit |
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| CN108631755A CN108631755A (en) | 2018-10-09 |
| CN108631755B true CN108631755B (en) | 2024-01-30 |
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| CN116155259B (en) * | 2023-01-10 | 2023-07-18 | 西安兴汇电力科技有限公司 | Thick film circuit for prolonging service life of optocoupler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944853A (en) * | 2010-03-19 | 2011-01-12 | 郁百超 | Green power inverter |
| CN203896193U (en) * | 2014-04-23 | 2014-10-22 | 深圳市时代创新科技有限公司 | Wide voltage input power supply module |
| CN208337525U (en) * | 2018-06-25 | 2019-01-04 | 沈阳铁路信号有限责任公司 | A kind of square-wave pulse output resonance matching unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003903787A0 (en) * | 2003-07-22 | 2003-08-07 | Sergio Adolfo Maiocchi | A system for operating a dc motor |
| TWI326520B (en) * | 2006-09-29 | 2010-06-21 | Chimei Innolux Corp | Switching power supply circuit |
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- 2018-06-25 CN CN201810657736.4A patent/CN108631755B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944853A (en) * | 2010-03-19 | 2011-01-12 | 郁百超 | Green power inverter |
| CN203896193U (en) * | 2014-04-23 | 2014-10-22 | 深圳市时代创新科技有限公司 | Wide voltage input power supply module |
| CN208337525U (en) * | 2018-06-25 | 2019-01-04 | 沈阳铁路信号有限责任公司 | A kind of square-wave pulse output resonance matching unit |
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