High efficiency power amplifier comprising multilevel power supp

Details High efficiency power amplifier comprising multilevel power supp High efficiency power amplifier comprising multilevel power supp

1988-04-12

1989-10-03

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330255, H03F 368, H03F 345

Patent

active

048719803

ABSTRACT:
The analog power amplifier (PA) is particularly for a closed loop signal amplification requiring high output power, high efficiency, high speed, wide operating temperature range and a low number of components. The high efficiency is obtained thru an employment of multiple PAs and a nonlinear amplifier which completely eliminates controllable power switches. No thermal compensation and no matching of the output transistors, and no adjustments are necessary.
A nonlinear amplifier amplifies an input signal and provides a plurality of interim signals each having a different transfer function with respect to the input signal. PAs separately amplify each of the interim signals and provide at least a portion of an output signal of the entire PA. The nonlinear amplifier includes a plurality of diode circuits for determining the transfer functions of the interim signals so that the output current take-over by the individual PAs is smooth.

REFERENCES:
patent: 4782306 (1988-11-01), Gulczynski

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