Audio frequency power amplifier with improved circuit topology

Details Audio frequency power amplifier with improved circuit topology Audio frequency power amplifier with improved circuit topology

H - Electricity

03

F

330/72

H03F 5/00 (2006.01) H03F 1/30 (2006.01) H03F 1/36 (2006.01)

Patent

CA 1309756

ABSTRACT OF THE DISCLOSURE The present invention is an audio frequency power amplifier input circuit having improved vacuum tube circuit topology. The improved circuit includes a direct current feedback circuit within the input circuitry which stabilizes the operating point of a phase inverter. The feedback circuit maintains optimum operation of the circuit despite variations in tube characteristics or supply voltages. Another aspect of the improved circuit comprises a low impedance phase inverter which improves the drive capability of the phase inverter to push-pull power output vacuum-tube grids.

613039

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