Circuit arrangements for modifying dynamic range using series an

Details Circuit arrangements for modifying dynamic range using series an Circuit arrangements for modifying dynamic range using series an

1985-06-17

1987-10-20

Gensler, Paul

Wave transmission lines and networks

Amplitude compression and expansion systems

381106, H04B 164

Patent

active

047017228

ABSTRACT:
Circuits for modifying the dynamic range of signals, particularly compressors and expanders for use in noise reduction compander systems, in which the advantages of fixed band characteristics (variable attenuation throughout all or part of the frequency band) and sliding band characteristics (variable attenuation through part of the frequency band achieved by a variable pass filter) are provided, without the disadvantages normally inherent in each characteristic. Fixed band and sliding band circuit elements are operated either in parallel or in series, the elements operating in generally the same level range and at least a partial overlapping in frequency range.

REFERENCES:
patent: 2589723 (1952-03-01), Miller, Jr.
patent: 3902131 (1975-08-01), Dorren
patent: 3911371 (1975-10-01), Nakamura et al.
patent: 4101849 (1978-07-01), Blackmer et al.
patent: 4462008 (1984-07-01), Katakura
patent: 4545258 (1985-10-01), Coursolle

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