Transmitter power control loop for high-speed wireless LANs

Details Transmitter power control loop for high-speed wireless LANs Transmitter power control loop for high-speed wireless LANs

2008-04-08

2008-04-08

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S296000, C330S134000

Reexamination Certificate

active

07355477

ABSTRACT:
A low cost, robust method and apparatus for controlling the gain of a power amplifier to compensate for changes that are gradual with time. The bias circuit of a power amplifier is sent one of three signals in response to a measurement of the average output power level of the power amplifier. If the average output power lever is less than a desired value, a signal to increment the bias current by a set amount is sent, so that the output power increases. If the average output power lever is more than the desired value, a signal to decrement the bias current by a set amount is sent. A third signal may be sent that causes the bias circuit to reset to a default value. The three signals may be sent as a two bit digital signal.

REFERENCES:
patent: 5812572 (1998-09-01), King et al.
patent: 6414974 (2002-07-01), Russell et al.
patent: 6907025 (2005-06-01), Demir et al.
patent: 7157974 (2007-01-01), Grillo et al.
patent: 7215198 (2007-05-01), Dasgupta
patent: 7215199 (2007-05-01), Marholev

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