RF power amplifier control

Details RF power amplifier control RF power amplifier control

1993-11-18

1995-01-03

Mottola, Steven

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330141, H03G 320

Patent

active

053789962

ABSTRACT:
An RF power amplifier is provided having means for defining rise and fall envelopes of the RF power, i.e. the key and de-key characteristics. A power amplifier (10), detector (13) and regulator (15 ) form a power control feedback loop. A further regulator (21) is provided having a first input coupled to the output of the power control loop regulator and an output coupled to the input of the power control loop regulator, thereby providing negative feedback to the power control loop regulator. Means are provided, coupled to a second input of the further regulator for providing a rising and falling control signal (Vramp) for control of the power amplifier.

REFERENCES:
patent: 4360787 (1992-11-01), Galpin
patent: 5150075 (1992-09-01), Hietala et al.
patent: 5252929 (1993-10-01), Taroumaru

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