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US 3,944,941 AGranted
Switching circuit for use with balanced transformerless amplifier
AssigneeSony Corporation
InventorAkira Tsuda
Life of this patent
Estimating the term…
Abstract
An output circuit for balanced amplifiers connected to one terminal of each of two loudspeakers with the other terminal of each loudspeaker connected together to the arm of a double-throw switch to make contact either with a terminal connected to the first terminal of one load to short circuit that load while applying signals from the amplifiers differentially to the other load, or to connect the second terminals of each of the loudspeakers to a common signal output terminal of the amplifiers so that each load is connected across a respective amplifier output circuit.
Claims5
An amplifier output circuit comprising
- A. first and second balanced signal terminals and a common signal terminal;
- B. first and second loads;
- C. switching means connected to said second balaced signal terminal and to said first and second loads to switch said output circuit selectively to a first or a second operating mode, said first load being connected between said first balanced terminal and said common signal terminal and said second load being connected between said second balanced terminal and said common signal terminal in said first mode, and said first load being connected across said first and second balanced signal terminals and said second load being short circuited in said second mode.
Dependencies are inferred from the claim text.