Title :
A 1.6mW 0.5GHz open-loop VGA with fast startup and offset calibration for UWB radios
Author :
Harpe, Pieter ; Zhou, Cui ; Philips, Kathleen ; De Groot, Harmke
Author_Institution :
Holst centre, IMEC, Eindhoven, Netherlands
Abstract :
This paper presents a low-power fast-startup wideband VGA with a 6th-order low-pass filter function for UWB radios. A DC-coupled 6-stage open-loop topology is proposed, which includes DC offset calibration and fast-startup biasing circuits. The prototype in 90nm CMOS occupies only 0.075mm2, including decoupling capacitors and digital interfacing. The circuit consumes 1.6mW from a 1V supply, achieves -1.2dB up to 37.7dB gain with a programmable bandwidth from 80MHz to 460MHz, and achieves a startup-time of 12ns.
Keywords :
CMOS integrated circuits; UHF amplifiers; capacitors; low-pass filters; ultra wideband communication; 6th-order low-pass filter; CMOS integrated circuit; DC offset calibration; DC-coupled 6-stage open-loop topology; UWB radios; bandwidth 80 MHz to 460 MHz; decoupling capacitors; digital interfacing; fast-startup VGA; fast-startup biasing circuits; frequency 0.5 GHz; low-power VGA; open-loop VGA; power 1.6 mW; size 90 nm; variable gain amplifiers; voltage 1 V; wideband VGA; Bandwidth; Calibration; Capacitors; Gain; Mirrors; Power demand; Semiconductor device measurement;
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2011.6044925
