Patent ID: 11909362
Assignee: CIRRUS LOGIC INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. Amplifier circuitry comprising:
a forward signal path for receiving an input signal and outputting an output signal;
a feedback path operable to provide a feedback signal derived from the output signal;
a feedforward path operable to provide a feedforward signal derived from the input signal;
a combiner operable to determine an error signal based on a difference between the feedback signal and the feedforward signal; and
a controller for selectively controlling a loop gain factor;
wherein the amplifier circuit is selectively operable to vary the loop gain factor so as to vary an extent to which the error signal contributes to the forward signal path; and
wherein the feedforward path comprises a compensation module configured to apply a controlled transfer function to the feedforward signal such that an overall transfer function for the amplifier circuit is substantially the same for different values of the loop gain factor.