Circuit for evaluating signals

Details Circuit for evaluating signals Circuit for evaluating signals

1981-08-31

1983-09-06

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307360, 328146, H03K 5153, H03K 524

Patent

active

044031599

ABSTRACT:
A circuit for evaluating signals has an operational amplifier and a comparator, both of which are supplied by a voltage source connected to ground at one side. The reference inputs of the amplifier and comparator are respectively connected to different taps of a voltage divider also connected across the voltage source, the taps being separated by a low-resistance resistor, thus attaining a stable zero signal level at the signal input of the comparator in the quiescent state through the non-inverting input of the operational amplifier and the output thereof, the stable zero signal level exhibiting a constant voltage difference in comparison to the reference potential at the reference input of the comparator.

REFERENCES:
patent: 3989959 (1976-11-01), Renirie et al.
patent: 4075507 (1978-02-01), Pauli et al.
patent: 4219839 (1980-08-01), Watanabe

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