Circuit for controlling power amplifier quiescent current

Details Circuit for controlling power amplifier quiescent current Circuit for controlling power amplifier quiescent current

2007-03-20

2007-03-20

Nguyen, Patricia (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S296000, C330S285000

Reexamination Certificate

active

11390576

ABSTRACT:
According to one exemplary embodiment, a circuit arrangement includes a power amplifier configured to receive an RF input signal. The circuit arrangement further includes a control circuit configured to receive and convert the RF input signal to an output DC voltage. The control circuit includes a voltage amplifier coupled to a peak detector circuit, where the peak detector circuit outputs the output DC voltage. The circuit arrangement further includes an analog control bias circuit coupling the output DC voltage to a bias input of the power amplifier. The output DC voltage causes the power amplifier to have a quiescent current that increases in a way that is substantially logarithmic with respect to the amplitude of the RF input signal. An increase in the RF input power can cause a substantially linear increase in the output DC voltage, where the RF input power is measured in dBm.

REFERENCES:
patent: 6233440 (2001-05-01), Taylor
patent: 6304145 (2001-10-01), Laureanti et al.
patent: 6427067 (2002-07-01), Arentz
patent: 6515545 (2003-02-01), Hu et al.
patent: 6791418 (2004-09-01), Luo et al.
patent: 7005923 (2006-02-01), Noh et al.

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