HIGH OVERSAMPLING RATIO DYNAMIC ELEMENT MATCHING SCHEME FOR HIGH DYNAMIC RANGE DIGITAL TO RF DATA CONVERSION FOR RADIO COMMUNICATION SYSTEMS

摘要

An RF transmitter module for a cellular radio that includes a delta-sigma modulator having a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate. An interleaver controller controls the DEM circuits so as to provide groups of the digital bits at different points in time. In one embodiment, a summation junction adds the groups of the digital bits to provide a continuous stream of the interleaved digital bits, a DAC converts the stream of interleaved digital bits to an analog signal, and a power amplifier amplifies the analog signal.

主权项

1. An RF transmitter module for a cellular radio, said transmitter module comprising:
a delta-sigma modulator including a plurality of interleaving dynamic element matching (DEM) circuits providing interleaved digital bits at a reduced clock rate; an interleaver controller for controlling the DEM circuits so as to provide groups of the digital bits at different points in time; at least one digital-to-analog converter (DAC) for converting the stream of interleaved digital bits to an analog signal; a tunable bandpass filter for removing out-of-band signals from the analog signal; and at least one power amplifier for amplifying the analog signal.