Title :
A Low-Power Ultra-Wideband CMOS True RMS Power Detector
Author :
Zhou, Yijun ; Chia, Michael Yan-Wah
Author_Institution :
Inst. for Infocomm Res. (I2R), Singapore
fDate :
5/1/2008 12:00:00 AM
Abstract :
This paper introduces a low-power ultra-wideband true root-mean-square power detector with a 0.13-mum CMOS process operating from 125 MHz to 8.5 GHz. The detector utilizes the MOS transistor´s square-law characteristic in the strong inversion region to obtain the power information of the input RF signal, and its exponential characteristic in the weak inversion region to realize the linear-in-decibel output. Measured dynamic ranges are 20 dB at 125 MHz and 18 dB at 8.5 GHz, respectively, with tolerances of plusmn0.5-dB error. WiMedia-ultrawideband and wireless local area network 802.11a signals with different modulation techniques and data rates are measured. The integrated detector operates at 1.2-V supply voltage, and its static power consumption is 0.18 mW.
Keywords :
CMOS integrated circuits; MMIC; UHF integrated circuits; low-power electronics; power integrated circuits; ultra wideband communication; wireless LAN; 802.11a signals; MOS transistor square-law characteristic; RF signal; RMS power detector; WiMedia-ultrawideband; exponential characteristic; frequency 125 MHz to 8.5 GHz; linear-in-decibel output; low-power ultra-wideband CMOS; low-power ultra-wideband power detector; mean-square power detector; power 0.18 mW; size 0.13 mum; voltage 1.2 V; weak inversion region; wireless local area network; CMOS; RF; WiMAX; crest factor; linear-in-decibel; low power; orthogonal frequency division multiplexing (OFDM); peak-to-average rate; power detector; root mean square (rms); ultra-wideband (UWB); wireless local area network (WLAN);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2008.921299
