H - Electricity – 04 – S
Patent
H - Electricity
04
S
179/8
H04S 5/00 (2006.01) H04R 5/04 (2006.01)
Patent
CA 1175361
Abstract The stereophonic sound synthesizer utilizes a phase splitter in the form of a transformer (20) to develop two oppositely phased audio signals, (A,B) from an applied monaural signal (M). One (A) of the two oppositely phased signals is applied to a transfer function circuit (30,40,50) of the form H(s), which modulates the intensity of a monaural signal as a function of the frequency. The intensity modulated H(s) signal may be applied to via an output (92) an amplifier for subsequent amplification and reproduction. The H(s) signal is also combined in a passive combining circuit (72, 74) with the other (B) of the two oppositely phase signals to produce at an output (94) a difference signal H(s) + M' which is the complement of the H(s) signal. The difference signal may be applied to an amplifier for subsequent amplification and reproduction. No differential amplifier is necessary to producer the difference signal because the necessary selective phase opposition of the signals combined in that transformer output signals. The synthesizer is especially applicable for use in a television receiver in which the transformer (20) electrically isolates the television's electrical system from the stereo synthesizer system's signal outputs, which may thus be applied to an external stereo amplifier safely.
397276
Benford John F.
Bingham Joseph P.
Morneau Roland L.
Rca Corporation
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