Control loop for amplification stage

摘要

There is disclosed a method and apparatus for generating an output signal comprising a replica of an input signal, comprising the steps of: generating a replica signal representing the low frequency content of the input signal; generating an error signal representing an error in the replica signal; combining the replica signal with the error signal to generate an output signal; and wherein the step of generating the error signal further includes the steps of: generating a delay signal being a delayed version of the input signal; and determining a difference between the output signal and the delay signal which difference is the error signal.

主权项

1. A control stage comprising:
a. a first path for receiving an input signal and for generating a replica signal representing the low frequency content of such signal; b. a second path for receiving the input signal and for generating an error signal representing an error in the replica signal; c. a combiner for combining the replica signal with the error signal to generate an output signal; d. and wherein the second path further includes:
i. a delay stage for generating a delay signal being a delayed version of the input signal; andii. a difference block for receiving as inputs the output signal and the delay signal and for generating the error signal.