Sony Electronics Inc

Borislav L Orozov

Joseph J Dombrowski, Jr

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.

Stereo image control circuit

A multi-mode audio imaging control device having unitary control element for use in recording and reproducing of multi-channel audio programs. The imaging control device includes a first channel input and a second channel input, four variable resistors for variably controlling the signal input from the first channel input and the second channel input to the inputs of a first differential amplifier and a second differential amplifier. The four variable resisters are coupled together so as to be simultaneously varied in accordance with a common control mechanism.

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Boca Raton, FL, United States of America

Borislav L Orozov