A single-chip CMOS transceiver front-end for DCS-1800 wireless communications

摘要

This work describes the design and realization of a low voltage single-chip wireless transceiver front-end in a standard 0.25 μm CMOS technology. The presented prototype integrates the LNA, down-converters, VCO, quadrature generator, up-converter and pre-amplifier on a single die. A high level of integration is achieved by using a low-IF topology for reception, a direct quadrature up-conversion topology for transmission and an oscillator with on-chip integrated inductor. The final objective of this design is to develop a complete transceiver system for wireless communications at 1.8 GHz that can be built with a minimum of surrounding components: only an antenna, a duplexer, a power amplifier and a baseband signal processing chip. The presented circuit consumes 240mW from a 2.5 V supply and occupies a die area of 8.6mm{sup}2.