Window discriminator or voltage range sensor

Details Window discriminator or voltage range sensor Window discriminator or voltage range sensor

1978-03-29

1980-01-15

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307299B, 307354, 307358, 330261, 330257, H03K 5153

Patent

active

041840879

ABSTRACT:
A window discriminator or voltage range sensor has an input for receiving a d.c. voltage to be sensed and an output for providing a signal when the voltage at the sensor input falls within a predetermined range. The sensor employs a differential switch which has first and second inputs and an output which is coupled to the sensor output. A biasing arrangement is coupled with the first input and is adapted to provide a bias voltage which is substantially independent of the voltage at the sensor input. A circuit is coupled between the sensor input and the second input to the differential switch and is arranged to provide at the second input a voltage related to the sensor input voltage, which voltage effects switching of the differential switch to one state when the d.c. input voltage reaches a predetermined lower level and to the other state when the voltage reaches a level determined by the bias voltage.

REFERENCES:
patent: 3341748 (1967-09-01), Kammiller
patent: 3354448 (1967-11-01), Brolin
patent: 3457560 (1969-07-01), McKinley
patent: 3586879 (1971-06-01), Ford

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