CN101340076A

CN101340076A - Dual-window voltage comparator wire and delay converting circuit

Info

Publication number: CN101340076A
Application number: CNA2008101455687A
Authority: CN
Inventors: 张翼洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-01
Filing date: 2008-08-01
Publication date: 2009-01-07
Anticipated expiration: 2028-08-01
Also published as: CN101340076B

Abstract

The invention discloses a dual-window voltage comparator wired-and delay conversion circuit, relates to a voltage comparator circuit, and belongs to the technical field of electronics. When the presently disclosed window voltage comparator which is composed of a voltage comparator is used for an electric circuit with a larger power supply internal resistance or a current source power supply to supply power, the electric circuit of the window voltage comparator has larger parasitic feedback, thus causing the electric circuit to be unstable. By adopting a four-stage coupling method, the circuit realizes delay transmission of an input signal and signal phase transformation, decreases the parasitic feedback and greatly improves the anti-interference capacity. The proposal is characterized in that an output terminal of the dual-window voltage comparator (1) is serially connected with a diode to perform wired-and output, the output terminal is connected with a delay circuit (2) with a resistor and a capacitor in parallel connection, then connected with an input terminal of a conversion circuit (3) composed of the voltage comparator, the output terminal of the conversion circuit is respectively connected with a feedback circuit (4) composed of a resistor, and the output terminal of the feedback circuit (4) is directly connected with the input terminal of the dual-window comparator (1).

Description

Dual-window voltage comparator wire and delay converting circuit

Affiliated technical field

The present invention relates to voltage comparator circuit, belong to field of electronic circuitry.

Background technology

Disclosed at present, CN1639976 voltage comparator, CN1567723 cmos voltage comparator, CN1536759 differential amplifier and relevant comparator, CN1687796 transformer provide voltage comparator earth wire charged testing device, CN1707942 voltage comparator circuit, CN101064512 voltage comparator group, CN101119021 overvoltage crowbar and the method thereof of detection signal.All there are not technical scheme proposed by the invention, technical characterictic, technique effect.Action by voltage comparator is by the material and the manufacturing process decision of device time of delay, generally moves time of delay in nanosecond, even if the window voltage comparator that is made of the voltage comparator group, also be faster its operate time.These circuit are when being used for the internal resistance of source than big or the power supply of current source power supply, parasitic feedback is bigger in the circuit, and parasitic feedback voltage has directly influenced the threshold values (reference voltage) of window voltage comparator, and it is unstable to make circuit produce, circuit produces vibration when serious, can't operate as normal.

Summary of the invention

In order to overcome above deficiency, the present invention constitutes dual-window voltage comparator with voltage comparator, circuit adopts the level Four coupled modes, the first order detects input signal and judges output, carry out and door output the signal of the first order second level, then output signal is carried out time lag of first order in time, the third level converts the digital signal of one two value (phse conversion) to inhibit signal, and the fourth stage feeds back to the input synchronous signal to the digital signal of one two value and also exports.

The fourth stage was failure to actuate when these circuit engineering characteristics were first order action, had reduced parasitic feedback, had improved antijamming capability greatly; By the parameter of delay circuit is set, adjust its time of delay; When this technical scheme is used as basic circuit, have the good front stage circuits and the coupling of late-class circuit.

The present invention forms a complete technical scheme Fig. 1 by four basic circuits, the first order 1 dual-window voltage comparator, realize a window voltage comparator function by two window voltage comparators, the second level 2 lines and delay circuit, the voltage comparator output is the OC door, line and output have been realized to signal, simultaneously also to this signal delay output, the third level 3 phase conversion circuits, utilize voltage comparator the analog signal conversion of input to be become the digital signal of one two value (phse conversion), the fourth stage 4 feedback circuits, the digital signal of one two value is fed back to input composition two bivalve values (reference voltage) comparator of first order dual-window voltage comparator 1, simultaneously, this output also is the input of late-class circuit.

Technical characterictic Fig. 2 of the present invention, carry out line and output at diode of dual-window voltage comparator 1 output series connection, this output is connected with delay circuit 2 by resistance and electric capacity parallel connection, the input that connects the change-over circuit 3 that constitutes by voltage comparator again, the output of phase conversion circuit connects the feedback circuit of being made up of resistance 4 respectively, the output of this feedback circuit 4 directly is connected the input of dual-window voltage comparator 1, and the while is as the input of late-class circuit.

The technical solution of the present invention beneficial effect is, when this dual-window voltage comparator wire and delay converting circuit used as control circuit, its scheme had very strong antijamming capability, and during particularly by the bigger power supply power supply of the internal resistance of source, effect is more obvious.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the technical scheme figure of dual-window voltage comparator of the present invention, line and delay circuit, phase conversion circuit, feedback circuit composition.

Fig. 2 is the technical characterictic figure of technical solution of the present invention.

Fig. 3 is the embodiment schematic diagram of technical solution of the present invention.

Fig. 4 is the Application Example schematic diagram of technical solution of the present invention.

Among Fig. 1: 1. dual-window voltage comparator, 2. line and delay circuit, 3. phase conversion circuit, 4. feedback circuit.

Among Fig. 2: dual-window voltage comparator and line and delay circuit 2 and phase conversion circuit 3 and feedback circuit 4 annexations.

Among Fig. 3: Vss is a positive source, Vdd is a power cathode, 1,3 ends are that reference voltage end also is a feedback input end, 2 ends are signal input parts, and 4,5 ends are signal output parts, and U1A, U1B, U1C, U1D are voltage comparators, D is line and diode, R20, C20 are delay circuits, and R30, R31 are the threshold values resistance of phase conversion circuit, and R10, R11 are feedback resistances.

Among Fig. 4: N is the neutral line of 220V AC power, L is the phase line of 220V AC power, C1 is the electric capacity that the 220V AC power is carried out step-down, D1, D2, D3, D4 are the power rectifier diodes, C2, R2, C3 are filtering devices, DW is a voltage stabilizing didoe, R2 is sample circuit carries out step-down to the 220V AC power a resistance, D5 is sample circuit carries out halfwave rectifier to the 220V AC power a diode, R3 is the load of sample circuit, and C4 is the filter capacitor of sample circuit, and Q1, Q2 drive the triode of relay, L1, L2 relay coil, the JDQ relay contact.

Embodiment

In Fig. 3, the technical program is that Vss connects positive source, Vdd connects power cathode, 1 and 3 ends are that reference voltage end also is a feedback input end, 2 end line power supply voltage signal inputs, 01 or 10 signal output parts after 4 and 5 conversion, U1A, U1B, U1C, U1D are voltage comparator, the D diode is realized line and function, and R20 and C20 realize delay feature, and R30 and R31 are the reference voltage end of change-over circuit, R10 and R11 feedback resistance, another termination 1 of one

termination

4 and 5 ends and 3 ends.Its characteristic pattern 2, carry out line and output at diode of dual-window voltage comparator 1 output series connection, this output is connected with delay circuit 2 by resistance and electric capacity parallel connection, the input that connects the phase conversion circuit 3 that constitutes by voltage comparator again, the output of change-over circuit connects the feedback circuit of being made up of resistance 4 respectively, the output of this feedback circuit 4 directly is connected the input of dual-window voltage comparator 1, and simultaneously, this output also is the input of late-class circuit.Its operation principle is, the first order 1 dual-window voltage comparator (realizing a window voltage comparator function by two window voltage comparators) detects signal and supplies with the second level 2 lines and (the voltage comparator output is the OC door) delay circuit, this signal the third level 3 phase conversion circuits have been supplied with, utilize voltage comparator the analog signal conversion of input to be become the digital signal of one two value, this digital signal is given the fourth stage 4 feedback circuits, the input that the digital signal of one two value is fed back to first order dual-window voltage comparator 1 is formed two bivalve values (reference voltage) comparator, and this signal is supplied with the input of late-class circuit simultaneously.

Further specify in conjunction with Fig. 4,220V alternating voltage between line phase L and the neutral line N is through the C1 step-down, D1, D2, D3, the D4 diode rectification, rectifier power source has directly been supplied with relay coil, to keep driving enough energy of relay work, C2, R2, C3 carries out voltage stabilizing to rectifier power source filtering and by the DW diode, because the structural analysis (summary) that this power circuit is formed, belong to the bigger power supply of the internal resistance of source, therefore, the dynamic change of load is when promptly control circuit sends signal moment and relay work, all produce strong parasitic feedback, cause the fluctuation of internal power source voltage; R2 resistance carries out step-down to the 220V AC power, D5 diode pair 220V AC power is carried out halfwave rectifier, the load of R3 resistance sampling circuit constitutes the sample circuit loop simultaneously, C4 electric capacity carries out filtering to sampled signal, supply control circuit 2 ends then, Q1, Q2 drive the triode of relay, L1, L2 relay coil, JDQ relay contact.Its operation principle is, voltage to circuit 220V AC power detects, being detected signal is transferred to the first order 1 dual-window voltage comparator and judges, if signal voltage is within the dual-window voltage comparator reference voltage, then the dual-window voltage comparator output is an open-circuit condition, otherwise, one of them window voltage comparator output is a low level, the second level 2 lines and delay circuit, the first order 1 signal is carried out postponing to be transferred to the third level 3 inputs simultaneously with door output, the third level 3 phase conversion circuits, inhibit signal is converted to the digital signal of one two value (phse conversion), the fourth stage feeds back to the input synchronous signal to the digital signal of one two value and also exports the Q1 of late-class circuit, the Q2 triode drives relay L1, the L2 coil makes the action of JDQ relay contact.Line over-voltage or under voltage automatic protection functions have been realized.

Claims

1 one kinds of dual-window voltage comparator wires and delay converting circuit, be by dual-window voltage comparator, line and delay circuit, phase conversion circuit, feedback circuit level Four coupled modes are formed, it is characterized in that, carry out line and output at diode of dual-window voltage comparator output series connection, this output be connected by resistance and electric capacity delay circuit in parallel, the input that connects the phase conversion circuit that constitutes by voltage comparator again, the output of change-over circuit connects the feedback circuit of being made up of resistance respectively, and the output of this feedback circuit directly is connected the input of dual-window voltage comparator.