Title :
A high IIP2 direct-conversion mixer using an even-harmonic reduction technique for cellular CDMA/PCS/GPS applications
Author :
Hwang, Myung-Woon ; Yoo, Seung-Yup ; Lee, Jeong-Chul ; Lee, Joonsuk ; Cho, Gyu-Hyeong
Author_Institution :
Future Commun. IC (FCI) Inc., Kyunggi-Do, South Korea
Abstract :
An even-harmonic reduction technique to enhance IIP2 (second order input intercept point) performance in a direct-conversion mixer is proposed based on a simplified analysis of second-order intermodulation. Using the proposed technique, IIP2 performance can be improved while reducing sensitivity to operating condition and output load mismatch. Direct-conversion mixers for cellular CDMA, PCS, and GPS applications are designed and fabricated in a 0.35 μm SiGe BiCMOS process. Measurement results show 40 dB improvement and reduced sensitivity of IIP2, which are consistent with simulation results.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; Global Positioning System; cellular radio; frequency convertors; harmonic analysis; integrated circuit design; intermodulation; mixers (circuits); radio receivers; 0.35 micron; BiCMOS process; GPS; IIP2; PCS; SiGe; analog integrated circuits; cellular CDMA; direct-conversion mixer; direct-conversion receivers; down-converter; even-harmonic reduction technique; harmonic analysis; second order input intercept point; second-order intermodulation; Application specific integrated circuits; BiCMOS integrated circuits; Cities and towns; Global Positioning System; Multiaccess communication; Performance analysis; Personal communication networks; SAW filters; Silicon germanium; Transconductance;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320519
