Title :
A low-power auto-zeroed comparator for column-paralleled 14b SAR ADCs of 384×288 IRFPA ROIC
Author :
Meng Chen ; Wengao Lu ; Tingting Tao ; Yacong Zhang ; Zhongjian Chen
Author_Institution :
Dept. of Microelectron., Peking Univ., Beijing, China
Abstract :
This paper presents a low power comparator with auto-zeroed technique for the readout chain of a 384×288 infrared focal plane array (IRFPA). To overcome the high power consumption of column-paralleled application, a novel inverter=based pre-amplifier is introduced. The performances of the proposed comparator are verified by a 14-bit column paralleled Successive-Approximation-Register (SAR) A/D converter which is developed in a 0.35um CMOS-based process technology. The SFDR of the A/D converter is up to 93dB at a sampling clock of 31.25 KHz with an input signal of 1.009 KHz. The overall static power of the 384 column-paralleled ADCs is less than 50mW.
Keywords :
CMOS integrated circuits; analogue-digital conversion; comparators (circuits); focal planes; infrared detectors; low-power electronics; preamplifiers; CMOS-based process technology; IRFPA ROIC; SFDR; column-paralleled SAR ADC; frequency 31.25 kHz; infrared focal plane array; low-power auto-zeroed comparator; preamplifier; readout chain; size 0.35 mum; successive-approximation-register A/D converter; word length 14 bit; Switches; ADC; IRFPA; auto-zero; comparator; low-power;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2013 IEEE International Conference of
Conference_Location :
Hong Kong
DOI :
10.1109/EDSSC.2013.6628037
