Power-saving low-frequency power amplifier

Details Power-saving low-frequency power amplifier Power-saving low-frequency power amplifier

1989-08-10

1991-05-07

Mullins, James B.

Amplifiers

Combined with automatic amplifier disabling switch means

330261, 330267, 330296, 379395, H03F 3183

Patent

active

050140175

ABSTRACT:
A power saving low frequency power amplifier includes a first stage amplifier for receiving and amplifying data signal, a second stage amplifier for amplifying the output of the first stage amplifier, and a power amplifier for amplifying the output of the second amplifier. The first stage amplifier is operated in response to a driving current. The second stage amplifier receives a first idling current for obtaining a predetermined amplification, and the power amplifier receives a second idling current for obtaining a predetermined amplification. A first switching circuit is provided for making and braking paths for the first and second idling currents provided for producing a power save signal to the first switching means for braking the first switching circuit when the power save signal is present.

REFERENCES:
patent: 3867709 (1975-02-01), Seki et al.
patent: 4315221 (1982-02-01), Numata et al.
patent: 4546327 (1985-10-01), Suzuki et al.
patent: 4853648 (1989-08-01), Imanishi

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