Title :
A highly-linear radio-frequency envelope detector for multi-standard operation
Author :
Cha, Jeongwon ; Woo, Wangmyung ; Cho, Changhyuk ; Park, Yunseo ; Lee, Chang-Ho ; Kim, Haksun ; Laskar, Joy
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A highly-linear RF envelope detector for amplitude modulation of multiple wireless standards is presented. The RF envelope detector employs a differential voltage-to-current converter and a current-mode full-wave rectifier to enhance linearity of output envelope signal. It is shown that the proposed RF envelope detector linearly tracks 5-MHz sine-wave envelope at 1.9-GHz RF carrier as well as WCDMA and WiMAX envelopes at 1.95 GHz and 2.4 GHz, respectively. The RF envelope detector was fabricated in a standard 0.18 mum CMOS technology. The active area is 0.12 by 0.12 mm2, and it consumes 1.8 mW of power at 1.8-V power supply.
Keywords :
CMOS integrated circuits; UHF detectors; amplitude modulation; current-mode circuits; rectifying circuits; telecommunication standards; CMOS technology; WCDMA; WiMAX; amplitude modulation; current-mode full-wave rectifier; differential voltage-to-current converter; frequency 1.95 GHz; frequency 2.4 GHz; frequency 5 MHz; highly-linear radio-frequency envelope detector; multiple wireless standard; power 1.8 mW; size 0.18 mum; voltage 1.8 V; Amplitude modulation; CMOS technology; Envelope detectors; Linearity; Multiaccess communication; RF signals; Radio frequency; Rectifiers; Voltage; WiMAX; RF envelope detectors; current-mode RF circuits; full-wave rectifiers; voltage-to-current converters;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2009. RFIC 2009. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-3377-3
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2009.5135510
