半导体学报（英文版）2012，Vol.33Issue(8)：82-88,7.DOI:10.1088/1674-4926/33/8/085001
A high-efficiency, low-noise power solution for a dual-channel GNSS RF receiver
A high-efficiency, low-noise power solution for a dual-channel GNSS RF receiver
Shi Jian 1Mo Taishan 1Le Jianlian 2Gan Yebing 2Ma Chengyan 1Ye Tianchun2
作者信息
- 1. Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
- 2. Hangzhou Zhongke Microelectronics Co, Ltd, Hangzhou 310053, China
- 折叠
摘要
Abstract
A high-efficiency low-noise power solution for a dual-channel GNSS RF receiver is presented.The power solution involves a DC-DC buck converter and a followed low-dropout regulator (LDO).The pulsewidth-modulation (PWM) control method is adopted for better noise performance.An improved low-power highfrequency PWM control circuit is proposed,which halves the average quiescent current of the buck converter to 80 μA by periodically shutting down the OTA.The size of the output stage has also been optimized to achieve high efficiency under a light load condition.In addition,a novel soft-start circuit based on a current limiter has been implemented to avoid inrush current.Fabricated with commercial 180-nm CMOS technology,the DC-DC converter achieves a peak efficiency of 93.1％ under a 2 MHz working frequency.The whole receiver consumes only 20.2 mA from a 3.3 V power supply and has a noise figure of 2.5 dB.关键词
GNSS/power solution/DC-DC converter/pulse-width-modulation/low-dropout regulatorKey words
GNSS/power solution/DC-DC converter/pulse-width-modulation/low-dropout regulator引用本文复制引用
Shi Jian,Mo Taishan,Le Jianlian,Gan Yebing,Ma Chengyan,Ye Tianchun..A high-efficiency, low-noise power solution for a dual-channel GNSS RF receiver[J].半导体学报（英文版）,2012,33(8):82-88,7.
