Patent ID: 7586996

Claim:
A method for controlling power of an output signal from an amplifier system comprising at least one variable-gain amplifier receiving an incident signal, the method comprising: generating filtered digital information based on sampling the output signal from the at least one variable-gain amplifier, the sampled output signal being representative of the power of the output signal; generating control information based upon a setpoint that is representative of a desired power for the output signal, with the setpoint being different from the sampled output signal from the at least one variable-gain amplifier, and based upon a filter receiving the setpoint and having a transfer function for establishing the power in a desired response time; and establishing as separate inputs a gain control and a bias current control for the at least one variable-gain amplifier based upon the filtered digital information, based upon the control information, and based upon a polynomial digital regulation of the RST type, the polynomial digital regulation of the RST type having polynomial coefficients being determined based upon input parameters comprising characteristics of the at least one variable-gain amplifier and based upon characteristics of a filter generating the filtered digital information.