Audio power amplifier

Details Audio power amplifier Audio power amplifier

1986-04-21

1988-01-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330123, 330146, 330202, 330203, 330296, 330297, H03F 326

Patent

active

047194316

ABSTRACT:
A push-pull power amplifier includes a pair of input terminals, a pair of output terminals, a pair of matched output tubes having cathode, plate, and grid terminals, and a pair of output power supplies, all of which are connected to form a bridge circuit. A floating bias supply is coupled between the grid and plate of both output tubes. A first feedback resistor couples the floating bias supply to the cathode of the first output tube. A second feedback resistor couples the floating bias supply to the cathode of the second output tube. The floating bias supply and feedback resistors provide degenerative feedback without affecting power gain.

REFERENCES:
patent: 2877310 (1959-03-01), Donald, III
patent: 3351866 (1967-11-01), Goldsmith

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