High repetition rate signal reject apparatus and method

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307521, 307527, 328167, 36479401, H03K 500, H03K 522

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active

051421704

ABSTRACT:
A circuit is illustrated for eliminating a repetitiously occurring or constant frequency pulse signal from a train of signal pulses. The design is such that a plurality of such circuits can be connected in series to eliminate several of various frequency repetitious pulse signals, leaving only asynchronous signals in the pulse stream presented to downstream circuitry. The concept used is to record the time between two pulses and delete the passage of any signal during a time subsequent to the second of the two pulses by an amount equal to the difference between the first two pulses. If a pulse is detected during that time window, the circuit continues to blank out the passage of pulses for as long as a pulse is detected during the time window. If a predetermined maximum has not been exceeded, in the situation where no pulse is detected in the first time window blank, the original count is continued until a third pulse is detected and the time between the first pulse and the third pulse is recorded and used as the basis for possible repetition time interval for blanking.

REFERENCES:
patent: 3935392 (1976-01-01), Smith et al.
patent: 4953116 (1990-08-01), Nelson
patent: 4958311 (1990-09-01), Kadowaki et al.
patent: 5043653 (1991-08-01), Foster et al.
patent: 5043722 (1991-08-01), Aggers et al.

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