Low current drain amplifier incorporating means for minimizing s

Details Low current drain amplifier incorporating means for minimizing s Low current drain amplifier incorporating means for minimizing s

1975-08-28

1977-05-10

Mullins, James B.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307230, 330 69, H03K 520

Patent

active

040230465

ABSTRACT:
An amplifier circuit for detecting low level signals of positive or negative amplitude, and for producing an output pulse whenever the input signals exceed a predetermined threshold level. The threshold level, or sensitivity of the amplifier circuit, is established through use of a pair of operational transconductance amplifiers employed as comparators, the reference voltage for each comparator being set through a resistive circuit driven by one or more current sources. The design provides for compensation of amplifier offsets with minimal adjustment requirements, and permits operation with very low current drain.

REFERENCES:
patent: 3639824 (1972-02-01), Malavasi
patent: 3679916 (1972-07-01), Siebers
patent: 3792367 (1974-02-01), Fleischer et al.
patent: 3805091 (1974-04-01), Colin
patent: 3851259 (1974-11-01), Porawski
patent: 3924199 (1975-12-01), Pearlman

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