CN103532561B - A kind of frequency that improves presses the change-over circuit of transfer linearity degree - Google Patents
A kind of frequency that improves presses the change-over circuit of transfer linearity degree Download PDFInfo
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- CN103532561B CN103532561B CN201310502017.2A CN201310502017A CN103532561B CN 103532561 B CN103532561 B CN 103532561B CN 201310502017 A CN201310502017 A CN 201310502017A CN 103532561 B CN103532561 B CN 103532561B
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Abstract
The present invention relates to a kind of frequency that improves and press the change-over circuit of transfer linearity degree, including comparator U1, Schmidt trigger U2, rising edge flip-flops U3, rising edge flip-flops U4, phase inverter U5 or door U6, frequency-dividing counter U7, phase inverter U8, voltage-stabiliser tube Z1, crystal oscillator Q1, jumper K1, this circuit uses crystal oscillating circuit, rising edge flip-flops, frequency divider and general gate circuit to realize the frequency signal conversion to voltage signal, and cost is relatively low；Crystal oscillator produces the time base of standard, makes to keep consistent the time of integration in each frequency cycle by frequency divider, and amplitude and the frequency of not following input signal convert, it is ensured that the linearity that frequency to voltage is changed.
Description
Technical field
The invention belongs to engine electric-controlled system field, be specifically related to a kind of frequency that improves and press the change-over circuit of transfer linearity degree.
Background technology
In engine electric-controlled system, need frequency signal to be converted into voltage signal, generally use the mode of first-order filtering to be done directly the conversion of signal；Sometimes for improving the linearity that frequency signal is changed to voltage signal, special chip is used to complete.The mode using first-order filtering to be done directly conversion can be converted into frequency signal the voltage signal of correspondence, but it is impossible to ensure that conversion the linearity, voltage signal increases with signal frequency and strengthens, but can not form the relation of direct ratio, and signals collecting and computational accuracy are difficult to ensure card；Using special chip to complete the frequency signal conversion to voltage signal, it is possible to ensure proportional relation between the two, the linearity also is able to ensure, but chip is relatively costly, and the operating frequency range changed is usually limited.
Summary of the invention
The present invention is contemplated to solve problems of the prior art and provide a kind of frequency that improves and press the change-over circuit of transfer linearity degree.
Technical scheme: a kind of frequency that improves presses the change-over circuit of transfer linearity degree, including comparator U1, Schmidt trigger U2, rising edge flip-flops U3, rising edge flip-flops U4, phase inverter U5 or door U6, frequency-dividing counter U7, phase inverter U8, voltage-stabiliser tube Z1, crystal oscillator Q1, jumper K1, input signal IN is connected with resistance R1, the other end of R1 is connected with electric capacity C1, the negative pole of voltage-stabiliser tube Z1, one end of resistance R2, and the other end of electric capacity C1, the positive pole of voltage-stabiliser tube Z1 are connected to GND；The other end of resistance R2 is connected with positive output end 3 pin, one end of resistance R5 of U1, and the other end of resistance R5 is connected to input 1 pin of output 1 pin of U1, one end of resistance R6, U2, and the other end of resistance R6 connects VCC；The common port of negative input end 2 pin of U1 and resistance R3, R4 connects, and one end of resistance R4 is connected to GND, and the other end of resistance R3 is connected to 8 pin of VCC, U1 and is connected to 4 pin of VCC, U1 and is connected to GND；The CLK of output 2 pin of U2 and U3 connects, and the D pin of U3 is connected to the S pin of VCC, U3 and is connected to the Q pin of GND, U3 and is connected to the D pin of U4, and the R pin of U3 is connected to the RST pin of the Q pin of U4, U7；The R pin of U4 is connected to the S pin of GND, U4 and is connected to the CLK pin of GND, U4 and is connected to one end of resistance R8, one end of resistance R7, output 2 pin of U5, input 1 pin of U6；Another pin of R8 is connected to a pin of a pin of Q1, C3, and another pin of R7 is connected to input 1 pin of another pin of Q1, a pin of C2, U5, and another pin of C2, C3 is connected to GND；2 pin of U6 are connected to input 1 pin of U8, the 1 of K1～5 pin, and 3 pin of U6 are connected to the CLK pin of U7；Q1～the Q5 pin of U7 is connected with 6～10 pin of K1 respectively, and the GND pin of U7 is connected to the VCC pin of GND, U7 and is connected to VCC；Output 2 pin of U8 and resistance R9 one end connect, and the other end of R9 is connected to one end of electric capacity C4, output OUT, and the other end of electric capacity C4 is connected to GND.
Beneficial effects of the present invention: this circuit uses crystal oscillating circuit, rising edge flip-flops, frequency divider and general gate circuit to realize the frequency signal conversion to voltage signal, and cost is relatively low；Crystal oscillator produces the time base of standard, makes to keep time of integration in each frequency cycle consistent by frequency divider, does not follow input signal and obtains amplitude and frequency converts, it is ensured that the linearity that frequency to voltage is changed；Frequency divider and jumper connect, by selecting different on off states so that conversion frequency can be adjusted according to scope, and whole operating frequency range is wide, it is possible to meet the demand for control of engine electric-controlled system.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of mu balanced circuit of the present invention；
Fig. 2 is circuit signal figure of the present invention.
Detailed description of the invention
As it is shown in figure 1, this change-over circuit input signal IN is connected with resistance R1, the other end of R1 is connected with electric capacity C1, the negative pole of voltage-stabiliser tube Z1, one end of resistance R2, and the other end of electric capacity C1, the positive pole of voltage-stabiliser tube Z1 are connected to GND；The other end of resistance R2 is connected with positive output end 3 pin, one end of resistance R5 of U1, and the other end of resistance R5 is connected to input 1 pin of output 1 pin of U1, one end of resistance R6, U2, and the other end of resistance R6 connects VCC；The common port of negative input end 2 pin of U1 and resistance R3, R4 connects, and one end of resistance R4 is connected to GND, and the other end of resistance R3 is connected to 8 pin of VCC, U1 and is connected to 4 pin of VCC, U1 and is connected to GND；The CLK of output 2 pin of U2 and U3 connects, and the D pin of U3 is connected to the S pin of VCC, U3 and is connected to the Q pin of GND, U3 and is connected to the D pin of U4, and the R pin of U3 is connected to the RST pin of the Q pin of U4, U7；The R pin of U4 is connected to the S pin of GND, U4 and is connected to the CLK pin of GND, U4 and is connected to one end of resistance R8, one end of resistance R7, output 2 pin of U5, input 1 pin of U6；Another pin of R8 is connected to a pin of a pin of Q1, C3, and another pin of R7 is connected to input 1 pin of another pin of Q1, a pin of C2, U5, and another pin of C2, C3 is connected to GND；2 pin of U6 are connected to input 1 pin of U8, the 1 of K1～5 pin, and 3 pin of U6 are connected to the CLK pin of U7；Q1～the Q5 pin of U7 is connected with 6～10 pin of K1 respectively, and the GND pin of U7 is connected to the VCC pin of GND, U7 and is connected to VCC；Output 2 pin of U8 and resistance R9 one end connect, and the other end of R9 is connected to one end of electric capacity C4, output OUT, and the other end of electric capacity C4 is connected to GND.
The sine wave signal of sensor output is input to the input IN of this change-over circuit, is filtered processing by filter circuit R1, C1, is filtered high-frequency interferencing signal processing；Amplitude limiting processing is carried out afterwards, it is ensured that entered the signal V1 higher limit less than comparator of comparator U1 by current-limiting resistance R2 by zener diode Z1.Divider resistance R3, R4 are formed and compare threshold voltage signal V2, and signal V1 and V2 forms hysteresis voltage to Schmidt trigger U2, feedback resistance R5 to the comparison of V1, V2 by comparator U1 output square-wave signal V3, prevents circuit oscillation；Pull-up resistor R6 is in order to meet the output of the open circuit of comparator U1 and to arrange.Schmidt trigger U2 carries out regular process and forms square-wave signal V4 of standard square-wave signal V3, and V4, as the CLK signal of rising edge flip-flops, exports high level V5 at the output Q of rising edge flip-flops U3.Electric capacity C3, C2, crystal oscillator Q1 and current-limiting resistance R8, false-touch prevention generating resistance R7, phase inverter U5 composition oscillating circuit export the concentration signal V6 of whole operating circuit；V6 signal, as the CLK signal of rising edge flip-flops U4, exports high level V7, V7 at the output Q of rising edge flip-flops U4 and is input to the reset terminal RST of frequency-dividing counter U7, make output Q1(or Q2 of U7, Q3, Q4, Q5) output low level signal V8；V7 high level signal feeds back to again the reset terminal R of rising edge flip-flops U3 simultaneously, and the next rising edge at signal V6 makes rising edge flip-flops U4 output signal V7 become low level；Clock signal V6 by or door U6 be input to count splitter CLK end and start counting up, during counting, output Q1(or Q2 of frequency-dividing counter U7, Q3, Q4, Q5) output low level signal V8 always, V8 signal is charged to integrating capacitor C4 by phase inverter U8, integrating resistor R9；After U7 has counted, output Q1(or Q2, Q3, Q4, Q5) output high level signal V8, stop the charging process to integrating capacitor C4, till this state is continued until when the next rising edge of V4 arrives, complete the integral process in a frequency cycle.Output Q1, Q2, Q3, Q4, Q5 of U7 counting are connected with jumper K1 according to the operating frequency range changed, frequency pressure conversion requirements with satisfied wide scope, U7 utilizes the electricity time of depositing in reference frequency signal V6 guarantee every frequency cycle to be T, it is ensured that voltage and the operating frequency changed are proportional.
Claims (1)
1. the change-over circuit improving frequency pressure transfer linearity degree, including comparator U1, Schmidt trigger U2, rising edge d type flip flop U3, rising edge d type flip flop U4, phase inverter U5 or door U6, frequency-dividing counter U7, phase inverter U8, voltage-stabiliser tube Z1, crystal oscillator Q1, jumper K1, it is characterized in that input signal IN is connected with resistance R1, the other end of R1 is connected with electric capacity C1, the negative pole of voltage-stabiliser tube Z1, one end of resistance R2, and the other end of electric capacity C1, the positive pole of voltage-stabiliser tube Z1 are connected to GND；The other end of resistance R2 is connected with positive output end 3 pin, one end of resistance R5 of U1, and the other end of resistance R5 is connected to input 1 pin of output 1 pin of U1, one end of resistance R6, U2, and the other end of resistance R6 connects VCC；The common port of negative input end 2 pin of U1 and resistance R3, R4 connects, and one end of resistance R4 is connected to GND, and the other end of resistance R3 is connected to 8 pin of VCC, U1 and is connected to 4 pin of VCC, U1 and is connected to GND；The CLK of output 2 pin of U2 and U3 connects, and the D pin of U3 is connected to the S pin of VCC, U3 and is connected to the Q pin of GND, U3 and is connected to the D pin of U4, and the R pin of U3 is connected to the RST pin of the Q pin of U4, U7；The R pin of U4 is connected to the S pin of GND, U4 and is connected to the CLK pin of GND, U4 and is connected to one end of resistance R8, one end of resistance R7, output 2 pin of U5, input 1 pin of U6；Another pin of R8 is connected to a pin of a pin of Q1, C3, and another pin of R7 is connected to input 1 pin of another pin of Q1, a pin of C2, U5, and another pin of C2, C3 is connected to GND；2 pin of U6 are connected to input 1 pin of U8, the 1 of K1～5 pin, and 3 pin of U6 are connected to the CLK pin of U7；Q1～the Q5 pin of U7 is connected with 6～10 pin of K1 respectively, and the GND pin of U7 is connected to the VCC pin of GND, U7 and is connected to VCC；Output 2 pin of U8 and resistance R9 one end connect, and the other end of R9 is connected to one end of electric capacity C4, output OUT, and the other end of electric capacity C4 is connected to GND.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310502017.2A CN103532561B (en) | 2013-10-23 | 2013-10-23 | A kind of frequency that improves presses the change-over circuit of transfer linearity degree |
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| CN201310502017.2A CN103532561B (en) | 2013-10-23 | 2013-10-23 | A kind of frequency that improves presses the change-over circuit of transfer linearity degree |
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| CN103532561A CN103532561A (en) | 2014-01-22 |
| CN103532561B true CN103532561B (en) | 2016-08-31 |
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| CN105632448B (en) * | 2016-04-01 | 2019-01-01 | 北京爱格信达科技有限公司 | Signal automatic transfer equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242756A (en) * | 1997-02-27 | 1998-09-11 | Kinseki Ltd | Voltage control circuit and temperature compensation piezoelectric oscillator using it |
| CN102437727A (en) * | 2011-12-26 | 2012-05-02 | 杭州矽力杰半导体技术有限公司 | Boost power factor correction (PFC) controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2373654B (en) * | 2001-03-21 | 2005-02-09 | Fujitsu Ltd | Reducing jitter in mixed-signal integrated circuit devices |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242756A (en) * | 1997-02-27 | 1998-09-11 | Kinseki Ltd | Voltage control circuit and temperature compensation piezoelectric oscillator using it |
| CN102437727A (en) * | 2011-12-26 | 2012-05-02 | 杭州矽力杰半导体技术有限公司 | Boost power factor correction (PFC) controller |
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