Amplifier circuitry

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;
• and
• a combiner operable to determine an error signal based on a difference between the feedback signal and the feedforward signal;
• wherein the amplifier circuit is selectively operable in a closed-loop mode of operation in which the input signal in the forward signal path is combined with a signal derived from said error signal and an open-loop mode of operation in which the input signal in the forward signal path is not combined with a signal derived from said error signal;
• and
• wherein the feedforward path comprises a compensation module configured to apply a controlled transfer function to the feedforward signal in the closed-loop mode of operation such that an overall transfer function for the amplifier circuit is substantially the same in the closed-loop mode of operation and the open-loop mode of operation.