Loading patent…
AssigneeAndrew Corporation
InventorsJason Terosky, Anthony Chandler, Paul E. White, Thomas A. Bachman II
Estimating the term…
An automatic gain compensation circuit for actively adjusting the gain of an amplifier caused by in-loop and/or out-of-loop influences on system gain. Two matched RF detectors convert pre- and post-amplified signals to input and output voltages representative of the power of the RF signals. A gain control circuit which may include a Digital Analog Converter (DAC) utilizes an offset voltage that is weighted along with the input and output voltages to produce an error voltage. The error voltage is used to drive a voltage-controlled attenuator within the amplification path. Operational amplifiers may be used in the weighting circuits for weighting the input, output, and offset voltages in order to prevent loading of the RF detector outputs and to obtain rapid settling time. During amplifier operation, the offset voltage is adjusted by a processing unit to compensate for gain changes in the amplifier due to out-of-loop temperature-related influences on system gain.
A gain control circuit arrangement for a power amplifier, the circuit arrangement comprising:
A power amplifier, comprising:
A fixed gain power amplifier, comprising:
A method of controlling gain in a power amplifier, comprising:
A method of calibrating a fixed gain amplifier to operate at an operational gain, wherein the fixed gain amplifier initially operates at an initial gain that differs from the operational gain, the method comprising:
Dependencies are inferred from the claim text.