A 2.7 V GSM RF transceiver IC

This 2.7 V radio-frequency transceiver IC is intended for small, low-cost GSM handsets. All that is required to implement a GSM terminal radio section is this IC, a power amplifier module, dual-synthesizer IC, SAW filters, and other peripheral discrete components. This chip includes quadrature modulator phase-locked loop frequency translator with offset-mixer in the transmitter path, and a double-superhet receiver that consists of LNA with active-bias circuits, two Gilbert cell mixers, programmable gain linear amplifier, and quadrature demodulator. The circuit also contains frequency dividers with on-chip VHF VCO to simplify 2nd LO design. Power control functions are provided for independent transmit and receive operation. The IC is implemented in pure bipolar technology with f/sub T/=15 GHz, r/sub bb/´=150 /spl Omega/, and 0.6 /spl mu/m features (0.6 /spl mu/m BiCMOS process).