Title :
A compact comparator block for laser radar front-end receiver
Author :
Jongsun An ; Joo-Young Choi ; Eun-Gyu Lee ; Choul-Young Kim
Author_Institution :
Dept. of Electron. Eng., Chungnam Nat. Univ., Daejeon, South Korea
Abstract :
This paper describes a comparator block fabricated in 0.18um CMOS process. The comparator block composed of transimpedance amplifier(TIA) as a preamplifier and comparator with hysteresis. The regulated cascode(RGC) structure TIA is used as a preamplifier. The measured results provide 79dBΩ transimpedance gain, 148MHz -3dB bandwidth for a 0.5pF photodiode capacitance and 6.3mW power consumption for 1.8V supply voltage. The comparator has been integrated in a core size of only 30 × 35um2. The proposed comparator detect -33dBm optical power from 9A/W avalanche photo diode(APD) responsivity and has 13.65cm of walkerror.
Keywords :
CMOS integrated circuits; avalanche photodiodes; operational amplifiers; optical radar; preamplifiers; radar receivers; radiofrequency amplifiers; radiofrequency integrated circuits; APD; CMOS process; RGC structure; TIA; avalanche photo diode; bandwidth 148 MHz; capacitance 0.5 pF; compact comparator block; gain -3 dB; laser radar front-end receiver; photodiode capacitance; power 6.3 mW; preamplifier; regulated cascode structure; size 0.18 mum; transimpedance amplifier; voltage 1.8 V; Electron optics; Logic gates; Optical amplifiers; Optical buffering; Semiconductor device measurement; Stimulated emission; Comparator; Hyesterisis; Laser Radar; RGC; TIA; front-end receiver;
Conference_Titel :
SoC Design Conference (ISOCC), 2014 International
DOI :
10.1109/ISOCC.2014.7087632
