Abstract: A differential amplifier circuit that exhibits low temperature drift and a wide dynamic range includes a differential amplifier having first and second input terminals, first and second circuit nodes operatively connected to the first and second input terminals, respectively, a differential input signal pair, first and second sampling capacitors and a switching circuit. During a first operational phase, the switching circuit connects, a first plate of the first capacitor to a first input signal of the differential input signal pair, connects a first plate of the second capacitor to a second input signal of the differential input signal pair, and connects second plates of the first and second capacitors to a reference voltage.

Abstract: In the art of recording video signals, apparatus for drop-out compensation by detecting "missing" positive or negative going half cycles of recorded carrier signals includes logic for generating a "new" half cycle of appropriate polarity to replace individual missing half cycles which is inserted into the original recorded signal train. If a plurality of consecutive half cycles are missing, memory circuits supply signal information that approximates the information contained in the missing half cycles.