Amplifier control based on load impedance and methods

Details Amplifier control based on load impedance and methods Amplifier control based on load impedance and methods

2006-03-21

2006-03-21

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S002000

Reexamination Certificate

active

07015760

ABSTRACT:
A method of operating an amplifier, for example, in a wireless radio transceiver, including monitoring a characteristic of the amplifier during an operating interval of the amplifier, for example, during a transmission burst, providing an open-loop control signal to the amplifier during a subsequent operating interval of the amplifier wherein the open-loop control signal based on the characteristic monitored during a previous operating interval. In one embodiment, the corrected control signals are stored in a look-up table (510) that is updated based on the changes in load impedance.

REFERENCES:
patent: 6008698 (1999-12-01), Dacus et al.
patent: 6362690 (2002-03-01), Tichauer
patent: 6756852 (2004-06-01), Chen
patent: 6757526 (2004-06-01), Sharp et al.
RF Micro-Devices, “Quad-Band GSM850/GSM900/DCS/PCS Power Amp Module”, RF3140 Rev A4 0306030, 16 pages.

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