DIVERSITY RECEIVER FRONT END SYSTEM WITH VARIABLE-GAIN AMPLIFIERS

摘要

A diversity receiver front end system with variable-gain amplifiers is disclosed. A receiving system can include: a controller for selectively activating at least one of a plurality of paths between an input of a first multiplexer and an output of a second multiplexer. The receiving system can further include a plurality of bandpass filters. Each of the bandpass filters is disposed along a corresponding one of the paths, and filters a signal received in the bandpass filter to each frequency band. The receiving system can further include a plurality of variable gain amplifiers (VGAs). Each of the VGAs is disposed along a corresponding one of the paths, and amplifies a signal received in the VGA with a gain controlled by an amplifier control signal received from the controller.