Bias compensation circuit for RF power amplifier

Details Bias compensation circuit for RF power amplifier Bias compensation circuit for RF power amplifier

2007-06-19

2007-06-19

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

C330S285000

Reexamination Certificate

active

11036088

ABSTRACT:
An electronic circuit contains a controller integrated circuit and a power amplifier MMIC connected to the controller IC. The power amplifier MMIC contains a radio frequency power amplifier. The RF power amplifier is a double heterojunction bipolar transistor. The controller IC has an operational amplifier that supplies a DC bias to the base of the RF power amplifier through a ballast resistor. The operational amplifier has an output slope that compensates either partially or entirely for the voltage drop across the ballast resistor. A reference circuit in the power amplifier is disposed close enough to the power amplifier to mirror fluctuations in the base-emitter voltage caused by temperature fluctuations.

REFERENCES:
patent: 6300837 (2001-10-01), Sowlati et al.
patent: 6791418 (2004-09-01), Luo et al.
patent: 6809593 (2004-10-01), Newman et al.
patent: 6882227 (2005-04-01), Barry et al.
patent: 2004/0212433 (2004-10-01), Newman et al.

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