Amplitude comparator with a differential amplifier

Details Amplitude comparator with a differential amplifier Amplitude comparator with a differential amplifier

1978-06-05

1980-08-26

Zazworsky, John

Facsimile and static presentation processing

Static presentation processing

Attribute control

307351, 307360, 307362, 330280, 358 40, H03K 114, H04N 9537

Patent

active

042198399

ABSTRACT:
An input signal is coupled via a capacitor to a base of a transistor which constitutes a differential amplifier with another transistor. The base of the transistors are respectively fed with first and second predetermined voltages via a pair of transistors so that the differential amplifier produces an output signal proportional to the difference between the peak value of the input signal and a predetermined value only when the peak to peak value of the input signal exceeds a predetermined voltage.

REFERENCES:
patent: 3566296 (1971-02-01), Liu
patent: 3585510 (1971-06-01), O'Malley
patent: 3757137 (1973-09-01), Ahmed

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