Signal amplitude compression system

Details Signal amplitude compression system Signal amplitude compression system

1978-11-02

1980-01-08

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including gain control means

330138, 330280, H03G 310

Patent

active

041829930

ABSTRACT:
A system for compressing an electrical input signal so that the output signal is related to the input signal in accordance with a predetermined continuous gain function exhibiting (1) fixed gain where the input signal is below a predetermined set threshold level; (2) infinite compression limiting the output to some predetermined level so that as the input increases beyond a certain input level infinite compression is provided; and (3) a soft threshold between unity gain and infinite compression. The system includes a threshold level adjustment which automatically provides a gain adjustment so that the maximum output level (preferably on an RMS basis) remains unchanged with changes in the threshold level.

REFERENCES:
patent: 3550028 (1970-12-01), Dilley, Jr. et al.
patent: 3918003 (1975-11-01), Seidel
patent: 4103239 (1978-07-01), Meewezen

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