Stereo image control circuit

Details Stereo image control circuit Stereo image control circuit

1994-02-25

1995-07-18

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

H04S 100

Patent

active

054349214

ABSTRACT:
A stereo imaging circuit has a first channel input terminal, and a second channel input terminal; a variable resistance in circuit with each of the first and the second channel input terminals; a first amplifier in the first channel in circuit with the variable resistance, an output of the first amplifier in the first channel providing an input to a second amplifier in the first channel, an output of the second amplifier in said first channel providing an output of the first channel to a first channel output terminal; a first amplifier in the second channel in circuit with said variable resistance, an output of said first amplifier in said second channel providing an input to a second amplifier in the second channel, an output of the second amplifier in the second channel providing an output of the second channel to a second channel output terminal; a first interchannel amplifier having a variable transfer ratio and having an input in circuit with the first channel and an output in circuit with the second channel; a second interchannel amplifier having a variable transfer ratio and having an input in circuit with the second channel and an output in circuit with the first channel; the variable transfer ratio of the first and the second interchannel amplifiers being responsive to said variable resistance, whereby a stereo image circuit is provided which ranges between a MONO mode through a STEREO mode to a WIDE mode.

REFERENCES:
patent: 3170991 (1965-02-01), Glasgal
patent: 3222455 (1965-12-01), Golik
patent: 3755749 (1973-08-01), Van Ryswyk et al.
patent: 4149036 (1979-04-01), Okamoto et al.
patent: 4192969 (1980-03-01), Iwahara
Description of "Classic" unit sold by AMEK (undated).
Description of "BC III" unit sold by AMEK (undated).
Description of "Mats" Unit sold by Neve (undated).
Description of "SL5000M" unit sold by Solid State Logic (undated).

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