CN204760274U

CN204760274U - Contact disappears and trembles circuit

Info

Publication number: CN204760274U
Application number: CN201520467183.8U
Authority: CN
Inventors: 陈争争
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-02
Filing date: 2015-07-02
Publication date: 2015-11-11
Anticipated expiration: 2025-07-02

Abstract

The utility model discloses a contact disappears and trembles circuit, including chip U1, D trigger U2, resistance R1, not gate F1, electric capacity C1 and diode D1, chip U1 pin 4 is connected respectively to resistance R1 one end, chip U1 pin 8 and power VCC, anodal and the diode D2 positive pole of diode D1 is connected respectively to the resistance R1 other end, not gate F1 output is connected to diode D1 negative pole, incoming signal vi is connected respectively to not gate F1 input, diode D2 negative pole and D trigger U2's D foot, output signal vo and grounded capacitance C3 are connected respectively to D trigger U2's Q foot, chip U1 pin 3 is connected to D trigger U2's CLK foot, 7 difference connecting resistance R2 of chip U1 pin, chip U1 pin 6 and electric capacity C2, electric capacity C1 and chip U1 pin 1 and ground connection are connected respectively to the electric capacity C2 other end. The utility model discloses contact disappears and trembles circuit can eliminate the shake that the incoming signal vi switch -on produced in the twinkling of an eye, and circuit structure is simple, and is with low costs, effectual, and stability is high, especially adapted using widely.

Description

A kind of contact disappears twitter circuit

Technical field

The utility model relates to a kind of signal processing circuit, and specifically a kind of contact disappears twitter circuit.

Background technology

In mechanical contact switch, when the closing of contact or when opening, generation is shaken, make switching value very unstable in the state of action moment, if be operated in counting mode or as interrupting input, system works will be caused abnormal.

Utility model content

The purpose of this utility model is to provide a kind of contact to disappear twitter circuit, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technical scheme:

A kind of contact disappears twitter circuit, comprise chip U1, d type flip flop U2, resistance R1, not gate F1, electric capacity C1 and diode D1, described resistance R1 one end connects chip U1 pin 4 respectively, chip U1 pin 8 and power supply VCC, the resistance R1 other end connects diode D1 positive pole and diode D2 positive pole respectively, diode D1 negative pole connects not gate F1 output, not gate F1 input connects input signal Vi respectively, the D pin of diode D2 negative pole and d type flip flop U2, the Q pin of d type flip flop U2 connects output signal Vo and ground capacity C3 respectively, the CLK pin of d type flip flop U2 connects chip U1 pin 3, chip U1 pin 7 is contact resistance R2 respectively, chip U1 pin 6 and electric capacity C2, the electric capacity C2 other end connects electric capacity C1 and chip U1 pin 1 also ground connection respectively, the electric capacity C1 other end connects chip U1 pin 5.

As further program of the utility model: described chip U1 model is NE555.

As the utility model further scheme: described power supply VCC voltage is 5V.

Compared with prior art, the beneficial effects of the utility model are: input signal Vi can be connected the jitter elimination produced instantaneously by the utility model contact twitter circuit that disappears, and circuit structure is simple, and cost is low, effective, and stability is high, is applicable to very much promoting the use of.

Accompanying drawing explanation

Fig. 1 is that contact disappears the circuit diagram of twitter circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1, in the utility model embodiment, a kind of contact disappears twitter circuit, comprise chip U1, d type flip flop U2, resistance R1, not gate F1, electric capacity C1 and diode D1, resistance R1 one end connects chip U1 pin 4 respectively, chip U1 pin 8 and power supply VCC, the resistance R1 other end connects diode D1 positive pole and diode D2 positive pole respectively, diode D1 negative pole connects not gate F1 output, not gate F1 input connects input signal Vi respectively, the D pin of diode D2 negative pole and d type flip flop U2, the Q pin of d type flip flop U2 connects output signal Vo and ground capacity C3 respectively, the CLK pin of d type flip flop U2 connects chip U1 pin 3, chip U1 pin 7 is contact resistance R2 respectively, chip U1 pin 6 and electric capacity C2, the electric capacity C2 other end connects electric capacity C1 and chip U1 pin 1 also ground connection respectively, the electric capacity C1 other end connects chip U1 pin 5.

Chip U1 model is NE555.

Power supply VCC voltage is 5V.

Operation principle of the present utility model is: refer to Fig. 1, chip NE555 exports the clock as d type flip flop, the D end of d type flip flop is then connected with input signal Vi, NE555 is operated in monostable flipflop mode, NE555 will be triggered when input signal Vi terminal contacts is closed, produce the pulse of a pulse width T=0.632R2*C2, as long as this pulsewidth is greater than contact chatter time, just can obtain identical with input state, not have shake signal at d type flip flop output signal Vi end.

To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.

Claims

1. a contact disappears twitter circuit, comprise chip U1, d type flip flop U2, resistance R1, not gate F1, electric capacity C1 and diode D1, it is characterized in that, described resistance R1 one end connects chip U1 pin 4 respectively, chip U1 pin 8 and power supply VCC, the resistance R1 other end connects diode D1 positive pole and diode D2 positive pole respectively, diode D1 negative pole connects not gate F1 output, not gate F1 input connects input signal Vi respectively, the D pin of diode D2 negative pole and d type flip flop U2, the Q pin of d type flip flop U2 connects output signal Vo and ground capacity C3 respectively, the CLK pin of d type flip flop U2 connects chip U1 pin 3, chip U1 pin 7 is contact resistance R2 respectively, chip U1 pin 6 and electric capacity C2, the electric capacity C2 other end connects electric capacity C1 and chip U1 pin 1 also ground connection respectively, the electric capacity C1 other end connects chip U1 pin 5.

2. contact according to claim 1 disappears twitter circuit, and it is characterized in that, described chip U1 model is NE555.

3. contact according to claim 1 disappears twitter circuit, and it is characterized in that, described power supply VCC voltage is 5V.