CN203761351U - Square wave signal extracting circuit - Google Patents

Square wave signal extracting circuit Download PDF

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Publication number
CN203761351U
CN203761351U CN201420124266.2U CN201420124266U CN203761351U CN 203761351 U CN203761351 U CN 203761351U CN 201420124266 U CN201420124266 U CN 201420124266U CN 203761351 U CN203761351 U CN 203761351U
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China
Prior art keywords
pin
resistance
comparator
circuit
optical coupler
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Expired - Fee Related
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CN201420124266.2U
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Chinese (zh)
Inventor
贾其兵
骆飞
魏旺全
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CHENGDU YINZHONG DIGITAL EQUIPMENT Co Ltd
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CHENGDU YINZHONG DIGITAL EQUIPMENT Co Ltd
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Priority to CN201420124266.2U priority Critical patent/CN203761351U/en
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Abstract

The utility model provides a square wave signal extracting circuit, comprising a comparator U1. A pin BS of the comparator U1, a pin BAL and a pin VCC+ are all connected to a first external power supply anode +15VBAC and grounded capacitance C3. A pin VCC- of the comparator U1 is connected to a first external power supply cathode -15VBAC and grounded capacitance C2. A pin IN+ of the comparator U1 is connected to an input signal circuit. A pin IN- of the comparator U1 and a pin EO are both grounded. A pin CO of the comparator U1 is connected to a base electrode of a triode Q1 through resistor R7. A pin CO of the comparator U1 is connected to a second external power supply anode +5VBAC through a resistor R6. The emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected to an optical coupler U2, and the optical coupler U2 is also connected to a drive circuit and a signal comparison circuit. The square wave signal extracting circuit is advantageous in that interference immunity is good; signal extraction is stable; precision and distortion of input signal can be precisely detected.

Description

Square-wave signal extracts circuit
Technical field
The utility model relates to a kind of signal circuit, relates in particular a kind of square-wave signal and extracts circuit.
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 utility model is exactly that a kind of square-wave signal extracts circuit, for extracting and the synchronous square-wave signal of square-wave signal same frequency.
Utility model content
The utility model provides a kind of square-wave signal to extract circuit, 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 utility model is by the following technical solutions: square-wave signal extracts circuit, 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+15V BAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15V BAC 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+5V BAC by resistance R 6, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 connects optical coupler U2, optical 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 optical coupler U2 and the outside second source positive pole+5V BAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5V BAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described optical coupler connects the collector electrode of described triode Q1.
Described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of optical coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described optical coupler U2 connects signal output apparatus BACI PI, described relatively power supply PWRM+3.3V connects signal output apparatus BACI PI by resistance R 9, pin 5 ground connection of described optical 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 optical coupler U2 model is PS9714.
Compared with prior art, the beneficial effects of the utility model are: this square-wave signal of the utility model design extracts circuit, and not only anti-interference is good, 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 utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment
Square-wave signal as shown in Figure 1 extracts circuit, 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+15V BAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15V BAC 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+5V BAC by resistance R 6, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 connects optical coupler U2, optical 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 optical coupler U2 and the outside second source positive pole+5V BAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5V BAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described optical coupler connects the collector electrode of described triode Q1.
Described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of optical coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described optical coupler U2 connects signal output apparatus BACI PI, described relatively power supply PWRM+3.3V connects signal output apparatus BACI PI by resistance R 9, pin 5 ground connection of described optical 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 optical coupler U2 model is PS9714.
In the present embodiment, the pin 1 of optical 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, the square-wave signal obtaining is amplified after the rear optical coupler U2 of passing through reception produces photoelectric current and is exported by signal output apparatus BACI PI after resistance R 6 dividing potential drops and capacitor C 5 filtering by triode Q1.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, optical 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 embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection range of the present utility model.

Claims (5)

1. square-wave signal extracts circuit, 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+15V BAC and ground connection, the pin VCC-of described comparator U1 is connected with the capacitor C 2 of outside the first power cathode-15V BAC 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+5V BAC by resistance R 6, the grounded emitter of described triode Q1, the collector electrode of described triode Q1 connects optical coupler U2, optical coupler U2 is also connected with drive circuit and signal comparator circuit.
2. square-wave signal according to claim 1 extracts circuit, it is characterized in that: 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.
3. square-wave signal according to claim 1 extracts circuit, it is characterized in that: described drive circuit comprises the resistance R 8 being connected with the pin 1 of optical coupler U2 and the outside second source positive pole+5V BAC being connected with resistance R 8, the common port of described resistance R 8 and outside second source positive pole+5V BAC is also connected with the capacitor C 4 of ground connection, and the pin 2 of described optical coupler connects the collector electrode of described triode Q1.
4. square-wave signal according to claim 1 extracts circuit, it is characterized in that: described signal comparator circuit comprises the comparison power supply PWRM+3.3V being connected with the pin 3 of optical coupler U2, relatively power supply PWRM+3.3V is connected with the capacitor C 5 of ground connection, the pin 4 of described optical coupler U2 connects signal output apparatus BACI PI, described relatively power supply PWRM+3.3V connects signal output apparatus BACI PI by resistance R 9, pin 5 ground connection of described optical coupler U2.
5. square-wave signal according to claim 1 extracts circuit, it is characterized in that: described transformer TR model is TR0101, and the model of described comparator U1 is LM311D, and described triode Q1 model is 9013, and described optical coupler U2 model is PS9714.
CN201420124266.2U 2014-03-19 2014-03-19 Square wave signal extracting circuit Expired - Fee Related CN203761351U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420124266.2U CN203761351U (en) 2014-03-19 2014-03-19 Square wave signal extracting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420124266.2U CN203761351U (en) 2014-03-19 2014-03-19 Square wave signal extracting circuit

Publications (1)

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CN203761351U true CN203761351U (en) 2014-08-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825588A (en) * 2014-03-19 2014-05-28 成都引众数字设备有限公司 Circuit for extracting square wave signal
CN106329736A (en) * 2016-08-09 2017-01-11 中惠创智无线供电技术有限公司 System for adjusting power of wireless power supply transmitting terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825588A (en) * 2014-03-19 2014-05-28 成都引众数字设备有限公司 Circuit for extracting square wave signal
CN106329736A (en) * 2016-08-09 2017-01-11 中惠创智无线供电技术有限公司 System for adjusting power of wireless power supply transmitting terminal

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140806

Termination date: 20150319

EXPY Termination of patent right or utility model