Quiescent current control circuit for power amplifiers

Details Quiescent current control circuit for power amplifiers Quiescent current control circuit for power amplifiers

2006-05-16

2006-05-16

Nguyen, Patricia (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S296000

Reexamination Certificate

active

07046087

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: 6300837 (2001-10-01), Sowlati et al.
patent: 6427067 (2002-07-01), Arentz
patent: 6445247 (2002-09-01), Walker
patent: 6496061 (2002-12-01), Bloom et al.
patent: 6566944 (2003-05-01), Pehlke et al.
patent: 6784744 (2004-08-01), Tichauer
patent: 6791418 (2004-09-01), Luo et al.
“A Temperature Compensated Linear Power Detector,” Application Note 1328, Jan. 20, 2003, Agilent Technologies, Inc.
Linear Technology, LTC4259A, Quad IEEE802.3af, Power over Ethernet Controller with AC Disconnect, data sheet, date unknown, 32 pp., by Linear Technology Corp., 1630 McCarthy Bl., Milpitas, CA 95035.

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