A low voltage (1.8V) operation triple band WCDMA transceiver IC

A highly integrated triple band (800MHz/1.7GHz/2.1GHz) WCDMA transceiver IC which operates at low voltage (1.8V) is described. All functionalities are implemented in a single chip using a 0.18mum SiGe BiCMOS process. The direct conversion receiver consists of triple band preamplifiers, I/Q demodulators, channel select filters, and PGAs. The direct transmit upconverter consists of a modulator, a three stage VGA, and triple PA drivers. No TX carrier leakage calibration is needed. Two synthesizers with automatically calibrated VCOs are fabricated on the same chip. The IC draws 35mA in receive and 39-61 mA in transmit using a 1.8V supply voltage