Transition detector circuit

Details Transition detector circuit Transition detector circuit

1983-01-06

1985-06-18

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307360, 307517, 307520, H03K 5153

Patent

active

045242917

ABSTRACT:
A noise-tolerant transition detector circuit (2) for detecting when an input signal rises above a first value (V2) and falls below a second value (V1) comprising: comparator means (12, 14) which produces a first output signal when the input signal rises above the first value and a second output signal when the input signal falls below the second value; and bistable means (20) which is set to its first stable state in response to the comparator means first output signal and which is set to its second stable state in response to the comparator means second output signal.
Noise may be further reduced by using further bistable means (26) and pulse-forming means (28, 30) may also be employed.

REFERENCES:
patent: 3944936 (1976-03-01), Pryor
patent: 4291356 (1981-09-01), Mathieu
patent: 4352999 (1982-10-01), Galpin

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