Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Patent
1997-08-06
1999-06-22
Pascal, Robert
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
381 28, 381120, H03F 368
Patent
active
059146362
ABSTRACT:
A configuration of audio system components, utilizing standard amplifier components, wherein the audio system remains balanced through the speaker input terminals. For each channel of the system, a preamplifier produces a balanced output signal. Two power amplifiers or similar devices are conventionally configured to accept positive and negative input signals. The negative signal output of the preamplifier is connected to the positive input terminal of one of the power amplifiers, and the positive output signal of the preamplifier is connected to the positive input terminal of the other power amplifier. The negative and ground input terminals of both power amplifiers are connected to system ground. The connections between the preamplifiers and the amplifiers may be effected by a unique cable designed for this purpose. The positive output terminal of one of the power amplifier is connected to positive input terminal of the speaker, while the positive-output terminal of the other power amplifier is connected to the negative input terminal of the speaker. The negative output terminals of each power amplifier "floats", unconnected externally to the speakers.
REFERENCES:
patent: 4786878 (1988-11-01), Botti
patent: 5161198 (1992-11-01), Noble
Nguyen Patricia
Pascal Robert
Robinson Jill L.
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