Chattering preventive circuit

Details Chattering preventive circuit Chattering preventive circuit

1982-05-26

1984-10-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307247A, 307269, H03K 1756

Patent

active

044790651

ABSTRACT:
A chattering preventive circuit for preventing chattering in a switch having a mechanical contact. The circuit includes a switch element for producing an input signal representative of the open and closed states of the switch and also includes a periodic pulse signal. A first memory circuit receives the input signal and the periodic pulse signal and produces a write-in signal representative of the coincidence of the input signal and the periodic pulse signal. A second memory circuit receives the write-in signal and the periodic pulse signal and produces an output signal representative of the closed state of the switch element only when the switch element is kept closed for at least a predetermined time period. The second memory circuit will not produce the next output signal representative of another closing of the switch element unless the switch element first remains open for at least a predetermined time prior to reclosing.

REFERENCES:
patent: 4057738 (1977-11-01), Nishimura
patent: 4198579 (1980-04-01), Ebihara et al.
patent: 4417155 (1983-11-01), Aizawa

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