Voltage detecting circuit with hysteresis characteristic and hig

Details Voltage detecting circuit with hysteresis characteristic and hig Voltage detecting circuit with hysteresis characteristic and hig

1983-07-06

1985-12-10

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250214R, 307252N, 307252UA, 324 96, G01R 3100

Patent

active

045582262

ABSTRACT:
A voltage detecting circuit includes an input circuit section including a light emitting diode and a current supplying circuit for supplying a current to this light emitting diode in response to an input voltage, and an output circuit section for generating an output voltage in response to the light emitted from the light emitting diode. This output circuit section includes a phototransistor which, together with the light emitting diode constitutes a photocoupler. A characteristic between the input voltage and the output current of the current supplying circuit represents a hysteresis characteristic.

REFERENCES:
patent: 3812382 (1974-05-01), Pascente
patent: 3854089 (1974-12-01), Emler
Taschenbuch Elektrotechnik, vol. 1, published by Karl Hanser-Verlag, Munich, Vienna, 1976, pp. 707-708.
Tietze-Schenk, "Halbleiterschaltungstechnik", 3rd edition, published by Springer Verlag 1974, pp. 114-117.

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