Dual-band high-fidelity amplifier

Details Dual-band high-fidelity amplifier Dual-band high-fidelity amplifier

1988-02-29

1989-04-18

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

332264, H03F 330

Patent

active

048230944

ABSTRACT:
The disclosed amplifier comprises a high-frequency power output stage for current amplification of the high-frequency signals and a separate low-frequency power output stage for current amplification of the low-frequency signals. Reactive coupling means, including either inductors or a capacitor or both, together with resistors, coact with the two output stages to provide a novel crossover circuit to transmit high-frequency signal to the amplifier output terminal and low-frequency signals to the inputs of the low-frequency output stage to drive the latter. Each output stage is disclosed as having its own power supply. Each output stage may thus be implemented with devices optimized for its respective frequency range, intermodulation distortion is substantially reduced, and similar benefits accrue in the design of the separate power supplies.

REFERENCES:
patent: 3725727 (1973-04-01), Waehner

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