Title :
A CMOS Transmitter Leakage Canceller for WCDMA Applications
Author :
Hyoungsoo Kim ; Sanghyun Woo ; Sungyong Jung ; Kil-Hoon Lee
Author_Institution :
Dept. of Electr. Eng., Univ. of North Texas, Denton, TX, USA
Abstract :
A transmitter (TX) leakage canceller is proposed for improving the dynamic range of the receiver (RX) for wideband code division multiple access applications. A TX leakage canceller circuit in this paper is simple in implementation and has low noise figure (NF) contribution. It is a feed-forward canceller that samples a reference signal from the TX output and injects the amplitude-adjusted and phase-rotated signal to the RX chain. The canceller circuit is integrated with a low-noise amplifier and implemented in a 0.18-μm CMOS technology. A cancellation of 23 dB is achieved with only 10-mA current consumption increase and low NF increase.
Keywords :
CMOS analogue integrated circuits; code division multiple access; low noise amplifiers; CMOS technology; CMOS transmitter leakage canceller; RX chain; TX leakage canceller circuit; WCDMA Application; amplitude-adjusted signal; current 10 mA; feed-forward canceller; low-NF contribution; low-noise amplifier; low-noise figure contribution; phase-rotated signal; receiver dynamic range; reference signal; size 0.18 mum; wideband code division multiple access application; Gain; Jamming; Multiaccess communication; Noise; Noise measurement; Radio frequency; Spread spectrum communication; CMOS integrated circuits (ICs); cross modulation distortion; direct conversion; feed-forward cancellation; interference; intermodulation distortion; low-noise amplifiers (LNAs); radio transceivers; transmitter (TX) leakage; wideband code division multiple access (WCDMA);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2013.2274778
