Noise filter for zero crossing detector

Details Noise filter for zero crossing detector Noise filter for zero crossing detector

1990-01-17

1991-08-27

Hickey, R. J.

Electricity: single generator systems

Automatic control of generator or driving means

Speed or frequency of generator

322 58, 328167, 36472401, H03M 186, H02P 930, H03K 505

Patent

active

050436538

ABSTRACT:
A noise filter for the zero crossing detector of a digitized sine wave signal uses an adjustable noise integrator. The noise integrator incorporates a counter. The integration characteristic of the counter is adjustable by selecting a count rate or a count limit from a microprocessor memory.

REFERENCES:
patent: 4149258 (1979-04-01), Yahata et al.
patent: 4241311 (1980-12-01), Massey
patent: 4533863 (1985-08-01), Luhn et al.
patent: 4563630 (1986-01-01), Woodward et al.
patent: 4669095 (1987-05-01), Hall
patent: 4775890 (1988-10-01), Balaban et al.
patent: 4868774 (1989-09-01), Beukara

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