Zero-crossing point detection circuit

Details Zero-crossing point detection circuit Zero-crossing point detection circuit

1982-01-04

1984-10-30

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307290, 307360, H03K 5153

Patent

active

044802005

ABSTRACT:
The upward and downward transitions of an input signal are independently detected with undirectional hysteresis in opposite directions. The detection signals are then combined to provide a level crossing detection signal having no time lag and immune to small noise signals.

REFERENCES:
patent: 3909717 (1975-09-01), Gazzano
patent: 3939432 (1976-02-01), Nelson
patent: 3952213 (1976-04-01), Fukaya

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