논문 해외 국제전문학술지(SCI급) A TRIPLE-POWER-MODE DIGITAL POLAR CMOS RF POWER AMPLIFIER WITH LO DUTY CYCLE CONTROL
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-09
- 저자명 이동호
- 학술지명 IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
- 발행처명 IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 3
홈페이지논문 초록 (Abstract)
A triple-power-mode digital polar CMOS power amplifier (DPA) with a high dynamic range is presented. The triple-power-mode toenhance t he efficiency when operating under back-off power is facilitated by th e combination of a switched output transformer to change the load impedance and a reduced duty cycle of the LO input signal of th e DPA for additional back-off power. This static power-mode method fo r the low-power region can be used with a DPA which has a high dynami c range in conjunction with a digitally controlled bias generator. An improvement in the PAE from 14.5% to 28.7% is achieved at a b ack-off power of 6.5 dB from a peak output power of 21.54 dBm at 1.7 GHz. A digital transmit power control (TPC) range of 68.2 dB for WC DMA is realized without any external components.