CN103856203B - Signal conversion circuit - Google Patents
Signal conversion circuit Download PDFInfo
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- CN103856203B CN103856203B CN201410102410.7A CN201410102410A CN103856203B CN 103856203 B CN103856203 B CN 103856203B CN 201410102410 A CN201410102410 A CN 201410102410A CN 103856203 B CN103856203 B CN 103856203B
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Abstract
The invention discloses a signal conversion circuit. A BS, a BAL and a VCC+ of a comparator are connected and then connected with a grounded capacitor C2. The BS of the comparator is further connected with a power voltage +5VVFI and a resistor R3 and a resistor R4, wherein the resistor R3 is connected with the resistor R4 in series. One end of the resistor R3 is connected with a ground terminal of the capacitor C2. The common terminal of the resistor R3 and the resistor R4 is connected with an IN- of the comparator U1. A VCC- of the comparator and an EO are connected with the ground terminal of the capacitor C2. A CO of the comparator is connected with a resistor R5 and a resistor R6, wherein the resistor R5 is connected with the resistor R6 in parallel. The resistor R5 is connected with the power voltage +5VVFI. The resistor R6 is connected with the base electrode of an audion Q1. The emitting electrode of the audion Q1 is grounded. The collecting electrode of the audion Q1 is connected with an indicator lamp circuit LEDVFI-. An IN+ of the comparator is connected with a low-voltage testing signal circuit. The IN+ and the IN- of the comparator are connected with a capacitor C3. According to the signal conversion circuit, signal conversion is stable, burrs can be effectively removed, and the input signal range can be enlarged.
Description
Technical field
The present invention relates to a kind of signaling conversion circuit, the signal conversion electricity of more particularly to a kind of time check instrument
Road.
Background technology
Time check instrument is used for the precision of checking time, is used for some and counts accurately fields, such as rocket launching, defend
Star navigation, astronomical clock etc. require time for the field of high precision.
The sine wave power frequency component of input is converted into square-wave signal by the power frequency measurement part of the signal plate of time check instrument
It is input to fpga, by the square-wave signal cycle of fpga measurement input, thus obtaining work frequency；Because tester needs are higher
Time precision, so be accomplished by a change-over circuit efficient, stable and that interference is little, to carry when power frequency measurement signal is changed
High overall signal conversion quality.
Content of the invention
The invention provides a kind of signaling conversion circuit, solve that conventional power frequency measurement signal conversion is unstable, interference is big
Problem.
For solving above-mentioned technical problem, the present invention employs the following technical solutions: signaling conversion circuit, including comparator
The pin bs of u1, comparator u1, pin bal and pin vcc+ are connected with the electric capacity c2 of ground connection after being connected, described comparator
The pin bs of u1 is also associated with the resistance r3 and resistance r4 of supply voltage+5v vfi and series connection, and resistance r3 one end is with electric capacity c2's
Earth terminal connects, and the common port of described resistance r3 and resistance r4 connects the pin in- of comparator u1, the pin of described comparator u1
Vcc- and pin eo connects the earth terminal of electric capacity c2, and the pin co of described comparator u1 is connected with resistance r5 and the resistance of parallel connection
R6, resistance r5 connect supply voltage+5v vfi, and described resistance r6 connects the base stage of Npn triode q1, described Npn triode q1
Grounded emitter, the colelctor electrode of described Npn triode q1 connects indicator light circuit led vfi-, the pin of described comparator u1
In+ is also associated with low voltage experiment signal circuit, and the pin in+ and pin in- of described comparator u1 are also associated with electric capacity c3.
Described low voltage experiment signal circuit includes three-phase socket cn2 vfi, the phase line vfi l string of three-phase socket cn2 vfi
It is connected with the pin in+ of comparator u1 after connecting resistance r1, the zero line vfi n of described three-phase socket cn2 vfi is connected with diode
D1, diode d1 plus earth and diode d1 negative electrode are connected with zero line vfi n, and the pin in+ of described comparator u1 connects surely
The anode of pressure diode d2, the negative electrode of described Zener diode d2 connects the negative electrode of Zener diode d3, described Zener diode
The anode of d3 connects the earth terminal of diode d1, and the pin in+ of described comparator u1 is also associated with being connected on diode d1 earth terminal
Electric capacity c1, the pin in+ of described comparator u1 is also associated with clamp circuit.
Described Zener diode d2 and Zener diode d3 is all from sf0603 type diode.
Described clamp circuit includes diode d4, diode d5, diode d6 and diode d7, described diode d4's
Negative electrode connects the pin in+ of comparator u1, and the anode of described diode d4 connects the negative electrode of diode d5, described diode d5's
Anode connects the earth terminal of diode d1；The anode of described diode d6 connects the pin in+, described diode d6 of comparator u1
Negative electrode connect the anode of diode d7, the negative electrode of described diode d7 connects the earth terminal of diode d1.
Described diode d1, diode d4, diode d5, diode d6 and diode d7 are all from in4148 type two pole
Pipe.
The earth terminal of the pin in+ of described comparator u1 and diode d1 is also associated with the resistance r2 that resistance is 51 kilo-ohms.
Described comparator u1 selects lm211d type comparator.
State Npn triode q1 and select 9013 type audions.
Compared with prior art, the invention has the beneficial effects as follows: this signaling conversion circuit of present invention design, signal turns
Change stable, can effectively remove flash removed, anti-interference is good, it is possible to increase input reference signal.
Brief description
With reference to the accompanying drawings and detailed description the present invention is described in further detail.
Fig. 1 is the structural representation of the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Embodiment
Signaling conversion circuit as shown in Figure 1, including comparator u1, the pin bs of comparator u1, pin bal and pin
Vcc+ is connected with the electric capacity c2 of ground connection after being connected, the pin bs of described comparator u1 be also associated with supply voltage+5v vfi and
The resistance r3 of series connection and resistance r4, resistance r3 one end is connected with the earth terminal of electric capacity c2, and described resistance r3's and resistance r4 is public
End connects the pin in- of comparator u1, and the pin vcc- and pin eo of described comparator u1 connect the earth terminal of electric capacity c2, described
The pin co of comparator u1 is connected with the resistance r5 and resistance r6 of parallel connection, and resistance r5 connects supply voltage+5v vfi, described resistance
R6 connects the base stage of Npn triode q1, the grounded emitter of described Npn triode q1, and the colelctor electrode of described Npn triode q1 is even
Meet indicator light circuit led vfi-, the pin in+ of described comparator u1 is also associated with low voltage experiment signal circuit, described comparator
The pin in+ of u1 and pin in- is also associated with electric capacity c3.
Described low voltage experiment signal circuit includes three-phase socket cn2 vfi, the phase line vfi l string of three-phase socket cn2 vfi
It is connected with the pin in+ of comparator u1 after connecting resistance r1, the zero line vfi n of described three-phase socket cn2 vfi is connected with diode
D1, diode d1 plus earth and diode d1 negative electrode are connected with zero line vfi n, and the pin in+ of described comparator u1 connects surely
The anode of pressure diode d2, the negative electrode of described Zener diode d2 connects the negative electrode of Zener diode d3, described Zener diode
The anode of d3 connects the earth terminal of diode d1, and the pin in+ of described comparator u1 is also associated with being connected on diode d1 earth terminal
Electric capacity c1, the pin in+ of described comparator u1 is also associated with clamp circuit.
Described Zener diode d2 and Zener diode d3 is all from sf0603 type diode.
Described clamp circuit includes diode d4, diode d5, diode d6 and diode d7, described diode d4's
Negative electrode connects the pin in+ of comparator u1, and the anode of described diode d4 connects the negative electrode of diode d5, described diode d5's
Anode connects the earth terminal of diode d1；The anode of described diode d6 connects the pin in+, described diode d6 of comparator u1
Negative electrode connect the anode of diode d7, the negative electrode of described diode d7 connects the earth terminal of diode d1.
Described diode d1, diode d4, diode d5, diode d6 and diode d7 are all from in4148 type two pole
Pipe.
The earth terminal of the pin in+ of described comparator u1 and diode d1 is also associated with the resistance r2 that resistance is 51 kilo-ohms.
Described comparator u1 selects lm211d type comparator.
Described Npn triode q1 selects 9013 type audions.
In the present embodiment, input exchange signal vfi(ac 24v ~ 264v) after diode d1 halfwave rectifier again by resistance
R1 partial pressure obtains low voltage experiment signal vfi-test, and clamp voltage can be maintained at 1.4v by clamp circuit, and resistance r3 and r4 is by power supply
Voltage+5v_vfi partial pressure obtains datum vfi-vref(0.43v), low voltage experiment signal vfi- test and datum vfi-
Vref obtains the square-wave signal vfi-t-vref, vfi-t- with input exchange signal vfi same frequency after comparator u1 computing
, through Npn triode q1 9013 input indicator circuit led vfi-, vfi-t-vref signal is through npn tri- pole for vref signal
Pipe q1 9013 also inputs a signal into optocoupler clutch circuit, for the signal frequency of measurement output.
Test signal can be stablized and filter by low voltage experiment signal circuit, improve low voltage experiment signal vfi- test's
Precision and stability.
Electric capacity c2 is used for filtering the burr of applied signal voltage comparator input signal zero crossing, eliminates burr at this and causes
The rising edge of comparator output signal and falling edge burst pulse, such that it is able to effectively remove flash removed, improve signal measurement
Accuracy；And electric capacity c1 and electric capacity c2 can also play good filtering and anti-jamming effectiveness.
Resistance r2 is set to 51k ohm, so that input reference signal is widened, reaches ac 24v ~ 264v, this resistance and electric capacity
C2 makes effect preferable.
Npn triode q1 makes to be input to optocoupler clutch circuit after signal vfi-t-vref is anti-phase, so that not having outside letter
During number input, optocoupler is in non-luminescent state, reduces power consumption, and increases the service life.
It is embodiments of the invention as mentioned above.The present invention is not limited to above-mentioned embodiment, and anyone should learn
The structure change made under the enlightenment of the present invention, every have same or like technical scheme with the present invention, each falls within this
Within the protection domain of invention.
Claims (6)
1. signaling conversion circuit it is characterised in that: include comparator u1, the pin bs of comparator u1, pin bal and pin
Vcc+ is connected with the electric capacity c2 of ground connection after being connected, the pin bs of described comparator u1 be also associated with supply voltage+5v vfi and
The resistance r3 of series connection and resistance r4, resistance r3 one end is connected with the earth terminal of electric capacity c2, and described resistance r3's and resistance r4 is public
End connects the pin in- of comparator u1, and the pin vcc- and pin eo of described comparator u1 connect the earth terminal of electric capacity c2, described
The pin co of comparator u1 is connected with the resistance r5 and resistance r6 of parallel connection, and resistance r5 connects supply voltage+5v vfi, described resistance
R6 connects the base stage of Npn triode q1, the grounded emitter of described Npn triode q1, and the colelctor electrode of described Npn triode q1 is even
Meet indicator light circuit led vfi-, the pin in+ of described comparator u1 is also associated with low voltage experiment signal circuit, described comparator
The pin in+ of u1 and pin in- is also associated with electric capacity c3；Described comparator u1 selects lm211d type comparator, described npn tri- pole
Pipe q1 selects 9013 type audions.
2. signaling conversion circuit according to claim 1 it is characterised in that: described low voltage experiment signal circuit includes three-phase
It is connected with the pin in+ of comparator u1 after the phase line vfi l series resistor r1 of socket cn2 vfi, three-phase socket cn2 vfi, institute
The zero line vfi n stating three-phase socket cn2 vfi is connected with diode d1, diode d1 plus earth and diode d1 negative electrode and zero
Line vfi n connects, and the pin in+ of described comparator u1 connects the anode of Zener diode d2, the moon of described Zener diode d2
Pole connects the negative electrode of Zener diode d3, and the anode of described Zener diode d3 connects the earth terminal of diode d1, described comparator
The pin in+ of u1 is also associated with being connected on the electric capacity c1 of diode d1 earth terminal, and the pin in+ of described comparator u1 is also associated with clamping
Position circuit.
3. signaling conversion circuit according to claim 2 it is characterised in that: described Zener diode d2 and Zener diode
D3 is all from sf0603 type diode.
4. signaling conversion circuit according to claim 2 it is characterised in that: described clamp circuit include diode d4, two
Pole pipe d5, diode d6 and diode d7, the negative electrode of described diode d4 connects the pin in+ of comparator u1, described two poles
The anode of pipe d4 connects the negative electrode of diode d5, and the anode of described diode d5 connects the earth terminal of diode d1；Described two poles
The anode of pipe d6 connects the pin in+ of comparator u1, and the negative electrode of described diode d6 connects the anode of diode d7, described two poles
The negative electrode of pipe d7 connects the earth terminal of diode d1.
5. signaling conversion circuit according to claim 4 it is characterised in that: described diode d1, diode d4, diode
D5, diode d6 and diode d7 are all from in4148 type diode.
6. signaling conversion circuit according to claim 2 it is characterised in that: the pin in+ of described comparator u1 and two poles
The earth terminal of pipe d1 is also associated with the resistance r2 that resistance is 51 kilo-ohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102410.7A CN103856203B (en) | 2014-03-19 | 2014-03-19 | Signal conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102410.7A CN103856203B (en) | 2014-03-19 | 2014-03-19 | Signal conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103856203A CN103856203A (en) | 2014-06-11 |
| CN103856203B true CN103856203B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410102410.7A Active CN103856203B (en) | 2014-03-19 | 2014-03-19 | Signal conversion circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320113B (en) * | 2014-10-23 | 2017-10-13 | 江苏远华轻化装备有限公司 | A kind of photoreceptor voltage comparison circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066557A (en) * | 1991-05-08 | 1992-11-25 | 大连海华微电子有限公司 | Infrared remote controlling device for lamps and lanterns |
| EP0664615A2 (en) * | 1994-01-19 | 1995-07-26 | Alcatel N.V. | An ECL to CMOS signal converter circuit including toggle-fault detection |
| CN101226077A (en) * | 2008-02-13 | 2008-07-23 | 华北电力大学 | Method for improving measurement precision of turbo unit shafting torsional vibration |
| CN202998053U (en) * | 2012-12-14 | 2013-06-12 | 广州中国科学院先进技术研究所 | Interface circuit of conductivity sensor of micro-electro-mechanical system |
| CN203761365U (en) * | 2014-03-19 | 2014-08-06 | 成都引众数字设备有限公司 | Power frequency measuring signal conversion circuit |
-
2014
- 2014-03-19 CN CN201410102410.7A patent/CN103856203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066557A (en) * | 1991-05-08 | 1992-11-25 | 大连海华微电子有限公司 | Infrared remote controlling device for lamps and lanterns |
| EP0664615A2 (en) * | 1994-01-19 | 1995-07-26 | Alcatel N.V. | An ECL to CMOS signal converter circuit including toggle-fault detection |
| CN101226077A (en) * | 2008-02-13 | 2008-07-23 | 华北电力大学 | Method for improving measurement precision of turbo unit shafting torsional vibration |
| CN202998053U (en) * | 2012-12-14 | 2013-06-12 | 广州中国科学院先进技术研究所 | Interface circuit of conductivity sensor of micro-electro-mechanical system |
| CN203761365U (en) * | 2014-03-19 | 2014-08-06 | 成都引众数字设备有限公司 | Power frequency measuring signal conversion circuit |
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| Publication number | Publication date |
|---|---|
| CN103856203A (en) | 2014-06-11 |
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