Amplitude compressing/expanding circuit

Details Amplitude compressing/expanding circuit Amplitude compressing/expanding circuit

G - Physics

11

B

179/2

G11B 20/00 (2006.01) H03G 7/00 (2006.01)

Patent

CA 1309665

ABSTRACT In an amplitude compression and expansion circuit, the amplitude compression ratio for the output signal is switchable by controlling the gain of the amplitude modulating circuit based upon the signal level of the input signal or output signal from the amplitude modulating circuit. The amplitude compression and expansion circuit utilizes an adder circuit for outputting a difference signal between the input signal and output signal and a signal processing circuit for feeding out an output signal whose signal level varies with the difference signal, and is adapted to output a summation signal of the output signals from the amplitude modulating circuit and the signal processing circuit. This allows selection of a suitable input/output characteristic for the processing circuit and an improved output signal.

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