Compensation circuit for power amplifier

Details Compensation circuit for power amplifier Compensation circuit for power amplifier

1988-11-14

1989-09-05

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

315389, H03G 330

Patent

active

048642517

ABSTRACT:
A base drive compensation circuit for a power amplifier samples a fixed saturation voltage level on the output of a power transistor and couples the sampled output to an inverting input of an error amplifier having a sawtooth signal on its non-inverting input. The output of the error amplifier is a negative going signal whose duty cycle is established by the voltage level on the inverting input. The negative going signal is coupled to a switching power supply that develops a voltage which controls the base drive current to the power transistor.

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