CN103825588B - For extracting the circuit of square-wave signal - Google Patents
For extracting the circuit of square-wave signal Download PDFInfo
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- CN103825588B CN103825588B CN201410102036.0A CN201410102036A CN103825588B CN 103825588 B CN103825588 B CN 103825588B CN 201410102036 A CN201410102036 A CN 201410102036A CN 103825588 B CN103825588 B CN 103825588B
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Abstract
The present invention relates to the circuit for extracting square-wave signal. the present invention includes comparator U1, the pin BS of comparator U1, do pin BAL and pin VCC+ all connect outside the first positive source+15V? the capacitor C 3 of BAC and ground connection, the pin VCC-of comparator U1 and outside the first power cathode-15V? the capacitor C 2 of BAC and ground connection connects, the pin IN+ of comparator U1 is connected with input signal circuit, the pin IN-of comparator U1 and the equal ground connection of pin EO, the pin CO of comparator U1 is by the base stage of resistance R 7 connecting triode Q1, does the pin CO of comparator U1 also connect outside second source positive pole+5V by resistance R 6? BAC, the grounded emitter of triode Q1, the colelctor electrode of triode Q1 connects photo-coupler U2, photo-coupler U2 is also connected with drive circuit and signal comparator circuit. anti-interference of the present invention is good, and signal extraction is stable, can measure accurately precision and the distortion situation of input signal.
Description
Technical field
The present invention relates to a kind of signal circuit, relate in particular a kind of for extracting the circuit of square-wave signal.
Background technology
Square-wave signal sometimes needs to obtain different signals to reach different effects in the time processing, obtain as sometimes needed and the synchronous square-wave signal of input signal same frequency, sometimes need again to obtain the sine wave signal of the high amplitude of input signal, namely input signal is extracted to obtain again required signal, the present invention is exactly a kind of for extracting the circuit of square-wave signal, for extracting and the synchronous square-wave signal of square-wave signal same frequency.
Summary of the invention
The invention provides a kind of for extracting the circuit of square-wave signal, for detection of the precision of input signal and whether distortion, for improving precision and the accuracy of input signal.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: for extracting the circuit of square-wave signal, comprise comparator U1, the pin BS of comparator U1, pin BAL and pin VCC+ all connect the capacitor C 3 of outside the first positive source+15VBAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15VBAC and ground connection, the pin IN+ of described comparator U1 is connected with input signal circuit, the pin IN-of described comparator U1 and the equal ground connection of pin EO, the pin CO of described comparator U1 is by the base stage of resistance R 7 connecting triode Q1, the pin CO of described comparator U1 also connects outside second source positive pole+5VBAC by resistance R 6, the grounded emitter of described triode Q1, the colelctor electrode of described triode Q1 connects photo-coupler U2, photo-coupler U2 is also connected with drive circuit and signal comparator circuit.
Described input signal circuit comprises transformer TR, the former limit of transformer TR connects respectively input positive circuit BASC+ and input negative circuit BASC-, the upper contact resistance R2 of described input positive circuit BASC+, described input negative circuit BASC-is in series with resistance R 1 and resistance R 3, between described input positive circuit BASC+ and input negative circuit BASC-, be also connected with diode D1, diode D2 and resistance R 4, the anodic bonding resistance R 2 of described diode D1, the negative electrode of described diode D1 connects the negative electrode of diode D2, the anodic bonding of described diode D2 is at the common port of resistance R 1 and resistance R 3, described resistance R 4 one end are connected to resistance R 2, described resistance R 4 other ends connect resistance R 3, secondary one end ground connection of described transformer TR and the other end are connected with the pin IN+ of comparator U1 by resistance R 5, the common port of described resistance R 5 and comparator U1 pin IN+ is also connected with the capacitor C 1 of ground connection.
Described drive circuit comprises the resistance R 8 being connected with the pin 1 of photo-coupler U2 and the outside second source positive pole+5VBAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5VBAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described photo-coupler connects the colelctor electrode of described triode Q1.
Described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of photo-coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described photo-coupler U2 connects signal output apparatus BACIPI, described relatively power supply PWRM+3.3V connects signal output apparatus BACIPI by resistance R 9, pin 5 ground connection of described photo-coupler U2.
Described transformer TR model is TR0101, and the model of described comparator U1 is LM311D, and described triode Q1 model is 9013, and described photo-coupler U2 model is PS9714.
Compared with prior art, the invention has the beneficial effects as follows: not only anti-interference is good for extracting the circuit of square-wave signal for the present invention design this, and signal extraction is stable, can measure accurately precision and the distortion situation of input signal.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment
As shown in Figure 1 for extracting the circuit of square-wave signal, comprise comparator U1, the pin BS of comparator U1, pin BAL and pin VCC+ all connect the capacitor C 3 of outside the first positive source+15VBAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15VBAC and ground connection, the pin IN+ of described comparator U1 is connected with input signal circuit, the pin IN-of described comparator U1 and the equal ground connection of pin EO, the pin CO of described comparator U1 is by the base stage of resistance R 7 connecting triode Q1, the pin CO of described comparator U1 also connects outside second source positive pole+5VBAC by resistance R 6, the grounded emitter of described triode Q1, the colelctor electrode of described triode Q1 connects photo-coupler U2, photo-coupler U2 is also connected with drive circuit and signal comparator circuit.
Described input signal circuit comprises transformer TR, the former limit of transformer TR connects respectively input positive circuit BASC+ and input negative circuit BASC-, the upper contact resistance R2 of described input positive circuit BASC+, described input negative circuit BASC-is in series with resistance R 1 and resistance R 3, between described input positive circuit BASC+ and input negative circuit BASC-, be also connected with diode D1, diode D2 and resistance R 4, the anodic bonding resistance R 2 of described diode D1, the negative electrode of described diode D1 connects the negative electrode of diode D2, the anodic bonding of described diode D2 is at the common port of resistance R 1 and resistance R 3, described resistance R 4 one end are connected to resistance R 2, described resistance R 4 other ends connect resistance R 3, secondary one end ground connection of described transformer TR and the other end are connected with the pin IN+ of comparator U1 by resistance R 5, the common port of described resistance R 5 and comparator U1 pin IN+ is also connected with the capacitor C 1 of ground connection.
Described drive circuit comprises the resistance R 8 being connected with the pin 1 of photo-coupler U2 and the outside second source positive pole+5VBAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5VBAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described photo-coupler connects the colelctor electrode of described triode Q1.
Described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of photo-coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described photo-coupler U2 connects signal output apparatus BACIPI, described relatively power supply PWRM+3.3V connects signal output apparatus BACIPI by resistance R 9, pin 5 ground connection of described photo-coupler U2.
Described transformer TR model is TR0101, and the model of described comparator U1 is LM311D, and described triode Q1 model is 9013, and described photo-coupler U2 model is PS9714.
In the present embodiment, the pin 1 of photo-coupler U2 is Anode pin, and pin 2 is Cathode pin, and pin 3 is VCC pin, and pin 4 is VO pin, and pin 5 is GND pin, for simplifying the special numeral that adopts of accompanying drawing.
In the present embodiment, input signal makes reference with GND, comparator U1 is at the positive half cycle output high level of input signal, negative half period output low level, obtain and the synchronous square-wave signal of input signal same frequency, after the square-wave signal obtaining amplifies by triode Q1, receive to produce after photoelectric current by photo-coupler U2 and export by signal output apparatus BACIPI after resistance R 6 dividing potential drops and capacitor C 5 filtering. The present embodiment not only anti-interference is good, and signal extraction is stable, can measure accurately precision and the distortion situation of input signal.
The present embodiment input signal is through diode D1 and diode D2 voltage stabilizing, after resistance R 4 dividing potential drops, be input to comparator U1 by transformer TR, resistance R 5 is shunted, and capacitor C 1 plays filter action, the capacitor C 2 that comparator U1 connects and capacitor C 3 are for ensureing the stable of outside the first power supply, photo-coupler U2 contact resistance R9, R9 divides to obtain power supply PWRM+3.3V voltage, for substituting zero balancing point in the past, thereby can ensure the normal output of signal, capacitor C 5 is also filter action, can improve the anti-interference of integrated circuit.
Be as mentioned above embodiments of the invention. The present invention is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (3)
1. for extracting the circuit of square-wave signal, it is characterized in that: comprise comparator U1, the pin BS of comparator U1, pin BAL and pin VCC+ all connect the capacitor C 3 of outside the first positive source+15VBAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15VBAC and ground connection, the pin IN+ of described comparator U1 is connected with input signal circuit, the pin IN-of described comparator U1 and the equal ground connection of pin EO, the pin CO of described comparator U1 is by the base stage of resistance R 7 connecting triode Q1, the pin CO of described comparator U1 also connects outside second source positive pole+5VBAC by resistance R 6, the grounded emitter of described triode Q1, the colelctor electrode of described triode Q1 connects photo-coupler U2, photo-coupler U2 is also connected with drive circuit and signal comparator circuit, described input signal circuit comprises transformer TR, the former limit of transformer TR connects respectively input positive circuit BASC+ and input negative circuit BASC-, the upper contact resistance R2 of described input positive circuit BASC+, described input negative circuit BASC-is in series with resistance R 1 and resistance R 3, between described input positive circuit BASC+ and input negative circuit BASC-, be also connected with diode D1, diode D2 and resistance R 4, the anodic bonding resistance R 2 of described diode D1, the negative electrode of described diode D1 connects the negative electrode of diode D2, the anodic bonding of described diode D2 is at the common port of resistance R 1 and resistance R 3, described resistance R 4 one end are connected to resistance R 2, described resistance R 4 other ends connect resistance R 3, secondary one end ground connection of described transformer TR and the other end are connected with the pin IN+ of comparator U1 by resistance R 5, the common port of described resistance R 5 and comparator U1 pin IN+ is also connected with the capacitor C 1 of ground connection, described drive circuit comprises the resistance R 8 being connected with the pin 1 of photo-coupler U2 and the outside second source positive pole+5VBAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5VBAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described photo-coupler connects the colelctor electrode of described triode Q1.
2. according to claim 1 for extracting the circuit of square-wave signal, it is characterized in that: described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of photo-coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described photo-coupler U2 connects signal output apparatus BACIPI, described relatively power supply PWRM+3.3V connects signal output apparatus BACIPI by resistance R 9, pin 5 ground connection of described photo-coupler U2.
3. according to claim 1 for extracting the circuit of square-wave signal, it is characterized in that: described transformer TR model is TR0101, and the model of described comparator U1 is LM311D, described triode Q1 model is 9013, described photo-coupler U2 model is PS9714.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410102036.0A CN103825588B (en) | 2014-03-19 | 2014-03-19 | For extracting the circuit of square-wave signal |
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| CN201410102036.0A CN103825588B (en) | 2014-03-19 | 2014-03-19 | For extracting the circuit of square-wave signal |
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| CN103825588A CN103825588A (en) | 2014-05-28 |
| CN103825588B true CN103825588B (en) | 2016-05-11 |
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| CN110346637A (en) * | 2019-08-23 | 2019-10-18 | 邢台子中电子科技有限公司 | A kind of method and device of sinusoid information Digital Extraction |
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| KR20030034315A (en) * | 2001-10-22 | 2003-05-09 | 엘지이노텍 주식회사 | Trigger pulse generation device |
| CN100359332C (en) * | 2004-10-09 | 2008-01-02 | 西安交通大学 | Device for testing electric pulse strength for insulation |
| CN101226077B (en) * | 2008-02-13 | 2011-02-09 | 华北电力大学 | Method for improving measurement precision of turbo unit shafting torsional vibration |
| CN203761351U (en) * | 2014-03-19 | 2014-08-06 | 成都引众数字设备有限公司 | Square wave signal extracting circuit |
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