논문 해외 국제전문학술지(SCI급) A MIXED BIAS-MODE POWER AMPLIFIER FOR WCDMA APPLICATIONS
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2011-11
- 저자명 이동호
- 학술지명 MICROWAVE
- 발행처명 WILEY-BLACKWELL
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
홈페이지논문 초록 (Abstract)
A wideband code-division multiple access (WCDMA) CMOS power amplifier with a mixed bias-mode scheme has been developed to meet high lineari ty and low-quiescent current requirements at the same time. The power stage of the two-stage power amplifier consists in three identical differential pairs that are selectively biased with a fixed bias m ode or an adaptive bias mode.Each output power of three differential pairs is combined with an on-chip transformer to achieve output power requirement. The developed power amplifier shows 25.7% of power -stage drain efficiency at 27 dBm of output power with -33 dBc ACLR at 5MHz offset in 1.95 GHz. The quiescent current of the mixed bias-mod e power stage was 81 mA, whereas, it is 212 mA with the fixed bias mode . (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2547-2552,2011; View this article online at wileyonl inelibrary.com. DOI 10.1002/mop.26367