Frequency band selection techniques for multi-mode receiver application

Abstract

This paper describes a frequency-band selection technique and its application to multi-mode wireless transceiver applications. The technique utilizes voltage-controlled variable inductors and resistors for, respectively, changing input/output impedance and load of the transceiver's key-circuits in accordance with each mode's frequency band. Results for several 0.18 /spl mu/m-BiCMOS building block circuits including RF amplifiers and up/down mixers show feasibility of the approach for multi-mode transceiver systems.