Title: Switching circuit for use with balanced transformerless amplifier

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.

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Other info:

Inventors: Tsuda, Akira (Matsudo, JA)

Application Number: 492331
Filing Date: 1974-07-26
Publication_date: 1976-03-16
Assignee: Sony Corporation (Tokyo, JA)
Primary Class(es): 330/51 330/124R, 381/28, 381/89, 381/123
Other Classes:
US Patent Ref:

3026373	Mar, 1962	Fine et al.	179/1.
3026378	Mar, 1962	Fine et al.	179/1.
3329772	Jul, 1967	Farrell	179/1.

Other Refs:
Primary Examiner: Mullins, James B.
Assistant Examiner:
Attorney: Eslinger; Lewis H., Sinderbrand; Alvin