Title :
A direct conversion receiver with an IP2 calibrator for CDMA/PCS/GPS/AMPS applications
Author :
Kim, Woonyun ; Yang, Sung-Gi ; Yu, Jinhyuck ; Shin, Heeseon ; Choo, Wooseung ; Park, Byeong-Ha
Author_Institution :
RE Dev. Team, Samsung Electron. Co. Ltd, Gyeonggi-Do
fDate :
7/1/2006 12:00:00 AM
Abstract :
A second-order intercept point (IP2) calibration technique is developed using common-mode feedback (CMFB) circuitry in a direct-conversion receiver for wireless CDMA/PCS/GPS/AMPS applications. The IP2 calibrator is capable of providing different CMFB gain to tune its common-mode output impedance for each of the positive and negative mixer outputs. The CDMA mixer applying this method achieved a second-order input intercept point (IIP2) of 64 dBm, a third-order input intercept point (IIP3) of 4 dBm, a noise figure of 6.5 dB and a voltage gain of 42.2 dB. This result shows a 20 dB improvement from an uncalibrated IIP2 of 44 dBm. The receiver RFIC is implemented in a 0.5-mum SiGe BiCMOS process, and it operates from a 2.7 to 3.1 V single power supply
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; calibration; code division multiple access; intermodulation distortion; mixers (circuits); radio receivers; radiofrequency integrated circuits; 0.5 micron; 2.7 to 3.1 V; 42.2 dB; 6.5 dB; AMPS; BiCMOS analog integrated circuits; CDMA; GPS; PCS; SiGe; common-mode feedback circuit; direct conversion receiver; direct-conversion receiver; intermodulation distortion; mixer; mixers; radio receivers; receiver RFIC; second-order intercept point calibration technique; third-order input intercept point; Calibration; Feedback circuits; Gain; Global Positioning System; Impedance; Multiaccess communication; Noise figure; Personal communication networks; Radiofrequency integrated circuits; Voltage; BiCMOS analog integrated circuits; direct conversion; intermodulation distortion; mixers; radio receivers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.873926
