Composite amplifier with efficient power reduction

Details Composite amplifier with efficient power reduction Composite amplifier with efficient power reduction

1987-05-20

1988-07-05

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330 51, 330124R, H03F 308

Patent

active

047557699

ABSTRACT:
A composite amplifier includes a plurality of signal amplifiers. The amplified signals are coupled by transmission lines to node points for combination. In order to achieve a reduction in power below full output power, some of the amplifiers are deenergized. Shorting switches at selected points along the transmission lines are selectively rendered conductive to adjust the impedances to maintain impedance match. Short- or open-circuited transmission lines may also be switched in-circuit to aid in maintaining impedance match.

REFERENCES:
patent: 4311965 (1982-01-01), Jones
patent: 4315222 (1983-02-01), Saleh
patent: 4626806 (1986-12-01), Rosar et al.
patent: 4641106 (1987-02-01), Belohoubek et al.
patent: 4697160 (1987-09-01), Clark

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