Amplitude comparator with a differential amplifier

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

H - Electricity

03

F

330/20, 350/60

H03F 3/45 (2006.01) H04N 9/68 (2006.01)

Patent

CA 1131719

ABSTRACT OF THE DISCLOSURE An input signal is coupled via a capacitor to a base of a transistor which consitutes a differential amplifier with another transistor. The base of the transistors are repectively fed with first and second predetermined voltages via a pair of 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 predeteremined voltage.

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