Two loop automatic level control for power amplifier

Details Two loop automatic level control for power amplifier Two loop automatic level control for power amplifier

1982-06-11

1984-04-10

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

Control means for anode of screen grid circuit

330129, 330202, 330297, 332 59, 455127, H03G 320, H03C 100

Patent

active

044424078

ABSTRACT:
The power supply potential applied to the final stage of an RF amplifier is odulated by means of an adaptive power supply. The power supply potential applied to the final RF amplifier is controlled by a first control loop in accordance with an error signal derived from a comparison of a signal corresponding to the weighted sum of the magnitude of the supply voltage applied and the current drawn by the final amplifier and the amplitude of the modulating signal. Additionally, an automatic level control circuit controls the level of the RF output signal in a second control loop in accordance with a comparison between the magnitude of the RF output of the amplifier and the amplitude of the modulating signal.

REFERENCES:
patent: 3413570 (1978-11-01), Bruene et al.
patent: 3486128 (1969-12-01), Lohrmann
patent: 4320350 (1982-03-01), Drapac

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