Threshold detection

Details Threshold detection Threshold detection

1980-03-31

1981-12-29

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307350, 307362, 328146, 328162, H03K 5153

Patent

active

043085024

ABSTRACT:
A simple and inexpensive direct current voltage level detector is shown which has a significant immunity against interfering alternating current signal components. The output of a standard analog threshold detector is successively sampled by clock pulses having twice the repetition rate of the frequency of the expected interfering alternating current components. By requiring two successive samples to be above the threshold of detection, immunity is provided against false detection due to temporarily exceeding the threshold level due solely to the positive excursion of the interfering alternating current components. Simple clock-driven flip-flops are used for the sampling and a simple logical AND gate is used to detect the successive samples.

REFERENCES:
patent: 4198579 (1980-04-01), Ebihara et al.

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