Abstract: An automatic level control (ALC) circuit includes an input configured to receive a radio frequency (RF) input signal, a level control circuit coupled to the input and configured to control a level of the RF input signal in response to a feedback signal, and an output coupled to the level control circuit and configured to output a level-controlled RF output signal. The ALC circuit further includes a feedback path coupled to the output and configured to sample the level-controlled RF output signal to determine an error detected in the level-controlled RF output signal, and to generate the feedback signal in accordance with the error. The ALC circuit still further includes a feedforward path coupled to the input and configured to emulate a frequency response in the feedback path and to adjust the error determined in the feedback path according to the emulated frequency response.

Abstract: A multichannel interpolator has an input that receives input data that consists of interleaved channel data from a plurality of data channels. A block random access memory (BRAM) stores data samples from the input data received from the input. Input control logic receives the data samples from the input and places the data samples into the BRAM. Interpolator logic interpolates the data samples to produce output data. The output data is interpolated at an interpolation ratio programmed by a user. The interpolator logic includes a phase generator that calculates a value indicating the interpolation ratio, and a fractional template block that provides a fractional template used to interpolate the data samples to produce the output data, the fraction template block selecting, based on the value calculated by the phase generator. The fractional template is used to interpolate the data samples to produce the output data.