Instantaneous compressor and instantaneous expandor

Details Instantaneous compressor and instantaneous expandor Instantaneous compressor and instantaneous expandor

1980-09-10

1982-01-05

Gensler, Paul L.

Wave transmission lines and networks

Amplitude compression and expansion systems

330284, 370 7, 375 34, 333217, H04B 164

Patent

active

043096760

ABSTRACT:
An instantaneous compressor and an instantaneous expandor both of which use the logarithmic characteristics of diodes to provide compression and expansion, respectively, of uncompressed analog PAM signals and compressed analog PAM signals. Both the compressor and expandor also include circuitry having a temperature dependent gain characteristic. The signal at the compressor output is a temperature independent compressed analog signal which follows the compressor's logarithmic encoding characteristic. The signal at the output of the expandor is a temperature independent uncompressed analog signal which is substantially identical to the analog signal at the compressor input.

REFERENCES:
patent: 3176224 (1965-03-01), Lampke
patent: 3466572 (1969-09-01), Hanna et al.
patent: 3905028 (1975-09-01), Wintz et al.
patent: 4220875 (1980-09-01), Lawton

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