CN101340076B

CN101340076B - Dual-window voltage comparator wire and delay converting circuit

Info

Publication number: CN101340076B
Application number: CN2008101455687A
Authority: CN
Inventors: 张翼洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-01
Filing date: 2008-08-01
Publication date: 2012-07-25
Anticipated expiration: 2028-08-01
Also published as: CN101340076A

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 up 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, and circuit adopts the level Four coupled modes, and the first order detects input signal and judges output; Carry out and door output the signal of the first order second level; Then the 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; Through 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, and the first order 1 dual-window voltage comparator is realized 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, has realized line and output to signal, simultaneously also to this signal delay output; The third level 3 phase conversion circuits; Utilize voltage comparator that the analog signal conversion of input is become the digital signal of one two value (phse conversion), the fourth stage 4 feedback circuits feed back to input composition two bivalve values (reference voltage) comparator of first order dual-window voltage comparator 1 to the digital signal of one two value; 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 the parallel connection of resistance and electric capacity, connects the input of the change-over circuit 3 that is made up of voltage comparator again, and 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.

Technical scheme beneficial effect of the present invention 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

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

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 scheme of the present invention.

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

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

Embodiment

In Fig. 3, the present technique scheme is, Vss connects positive source, and 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, and the D diode is realized line and function, and R20 and C20 realize delay feature; R30 and R31 are the reference voltage end of change-over circuit, R10 and R11 feedback resistance, another termination 1 of one of which

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 be connected with the parallelly connected delay circuit 2 of electric capacity by resistance, connect the input of 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, and 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, simultaneously the input of this signal supply late-class circuit.

Further specify in conjunction with Fig. 4, the 220V alternating voltage between line phase L and the neutral line N is through the C1 step-down, D1, D2, D3, D4 diode rectification; Rectifier power source has directly been supplied with relay coil, and to keep driving enough energy of relay work, C2, R2, C3 carry out voltage stabilizing to rectifier power source filtering and through the DW diode; Because the structural analysis (summary) that this power circuit is formed belongs to the bigger power supply of the internal resistance of source, therefore; The dynamic change of load; Be control circuit when sending 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, and the load of R3 resistance sampling circuit constitutes the sample circuit loop simultaneously, and 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, the voltage of circuit 220V AC power is detected, and is detected signal and 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 carry out postponing to be transferred to the third level 3 inputs, the third level 3 phase conversion circuits simultaneously with door output to the first order 1 signal; 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, and the Q1 of late-class circuit, Q2 triode drive relay L1, L2 coil, makes the action of JDQ relay contact.Line over-voltage or under voltage automatic protection functions have been realized.

Claims

1. dual-window voltage comparator wire and delay converting circuit; Form by dual-window voltage comparator, line and delay circuit, phase conversion circuit, feedback circuit level Four coupled modes; It is characterized in that; At diode of dual-window voltage comparator output series connection; The output of this diode and resistance capacitance parallel circuits have been connected to form line and the delay circuit that is made up of diode, resistance, electric capacity; Line and the output of delay circuit are connected the input of the phase conversion circuit that is made up of voltage comparator again, and the two-way output of phase conversion circuit connects the input of the feedback circuit that is made up of resistance respectively, and the output of this feedback circuit directly is connected the input of dual-window voltage comparator.