Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-11-05
1977-11-08
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307268, 307269, 307291, 340365E, H03K 1700, H03K 1756
Patent
active
040577384
ABSTRACT:
An electronic circuit for eliminating chatter from a contact signal is provided. The electronic circuit includes a contact for producing a contact signal representative of a change of state. An asynchronous flip-flop is adapted to receive as a first input the contact signal and as a second input a first periodic pulse signal and in response to the coincidence in the changed state of the contact signal and the first periodic pulse signal producing at least one write-in pulse. A synchronous flip-flop is provided for receiving as a first input the write-in pulses produced by the asynchronous flip-flop and as a second input a second periodic pulse signal, the second periodic pulse signal being synchronized with respect to the first periodic pulse signal so that the leading edge of the first periodic signal defining the coincidence condition precedes a leading edge of the second pulse. The synchronous flip-flop in response to the write-in pulses and the leading edge of the second periodic pulse signal produces an output signal representative of the changed state of the contact signal.
REFERENCES:
patent: 3504200 (1970-03-01), Avellar
patent: 3795823 (1974-03-01), Morgan et al.
Kabushiki Kaisha Suwa Seikosha
Zazworsky John
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