Digital filter circuit

Details Digital filter circuit Digital filter circuit

1986-01-30

1987-08-11

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

377 39, 377 30, H03K 1716, H03K 2140

Patent

active

046864830

ABSTRACT:
A digital filter circuit includes first and second counters which set and reset a latch circuit at predetermined counts. Clock pulses and the input signal are passed through a gate circuit to the first counter which outputs a set signal to the latch circuit only if the input signal is maintained at a high level for the predetermined count. Clock pulses and the inverted input signal are passed through a gate circuit to the second counter which outputs a reset signal to the latch circuit only if the input signal is maintained at a low level for the predetermined count. In this manner noise pulses on the input signal are filtered out of the output signal obtained from the latch circuit.

REFERENCES:
patent: 3044065 (1962-07-01), Barney et al.
patent: 3851257 (1974-11-01), Boersma
patent: 4109210 (1978-08-01), Gerlach et al.
patent: 4468796 (1984-08-01), Suga

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