Bridge amplifier topology

Details Bridge amplifier topology Bridge amplifier topology

1987-10-13

1988-10-04

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including protection means

330146, 330207P, H02H 720, H03F 326

Patent

active

047758449

ABSTRACT:
A class A bridge topology for audio amplifiers configured to operate in constant current mode, comprising power stages (3,4,5,6) supplied by supplies (8,9) and driven to equal amplitude opposite phase output signals applied across a load (7). Symmetrical current conditions are placed on said power stages to achieve a cancellation of supply currents during signal application to the load. Supplies are current limited to afford non-intrusive protection against overstress.

REFERENCES:
patent: 2590104 (1952-03-01), King
patent: 3808545 (1974-04-01), Stanley
patent: 4023074 (1977-05-01), Fichtner
patent: 4117415 (1978-09-01), Hoover
patent: 4229706 (1980-10-01), Bongiorno
patent: 4611180 (1986-09-01), Stanley
"Constant-Current Operation of Power Amplifiers", H. Sterling, Journal of the Audio Engineering Society, Jan. 1953.
"Audio Amplifier Matches Voice Coil Impedance", K. Onder, Electronics, Feb. 1954.

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