Pulse signal detector and/or filter

Details Pulse signal detector and/or filter Pulse signal detector and/or filter

1977-02-28

1978-06-13

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307311, 328112, H03K 908

Patent

active

040951251

ABSTRACT:
Pulse signals are detected and/or filtered depending on pulse width. A first timing circuit is employed to establish first minimum interval T1 and a second timing circuit responsive to the first timing circuit timing out is employed to establish second timing interval T2. A third maximum interval T3 is defined as T1 + T2. Pulse signals having widths within a valid time interval window greater than minimum interval T1 and less than maximum interval T3 are detected and filtered. Pulse signals having widths less than interval T1 are not detected and are filtered. Pulse signals having widths greater than interval T3 are not detected or filtered. Pulse signals within the valid time interval window are detected by employing light emitting diodes to sense operative states of the timing circuits.

REFERENCES:
patent: 2984789 (1961-05-01), O'Brien
patent: 3315168 (1967-04-01), Cantella
patent: 3676699 (1972-07-01), Warren
patent: 3735271 (1973-05-01), Leibowitz
patent: 3821563 (1974-06-01), Warren
patent: 3852731 (1974-12-01), Hollands
patent: 3970944 (1976-07-01), Huellwegen

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