ABSTRACT
Currently Si-SiGe BiCMOS process technology is the workhorse for the implementation of wireless
building blocks. Depending on the application, circuit function, and communication standard, a wide
variety of requirements and specifications have to be fulfilled. A general trend in wireless communica-
tion systems is the use of increased data rates within confined frequency bands. For this purpose,
frequency bandwidth-efficient schemes for the digitally modulated signals (e.g. EDGE-GSM, WCDMA)
have been introduced. One of the common characteristics of these communication standards is the large
amplitude modulation component, which puts high linearity demands on the circuit blocks involved.
