Title :
A Switched-Capacitor Single-ended to Differential stage for A/D conversion of IRFPA ROIC
Author :
Meng Chen ; Wengao Lu ; Guannan Wang ; Ran Fang ; Yacong Zhang ; Zhongjian Chen ; Lijiu Ji
Author_Institution :
Dept. of Microelectron., Peking Univ., Beijing, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
This paper presents a Switched-Capacitor Single-ended to Differential (SC-STD) stage for A/D conversion of an Infrared Focal Plane Array (IRFPA) Readout Integration Circuit(ROIC). The SC-STD stage converts the output of the Capacitive Trans-Impedance Amplifier (CTIA) into differential signals, which can be used as the input of the subsequent A/D conversion. A novel Switched-Capacitor Common-Mode Feedback (SC-CMFB) technique with only two capacitors and single phase clock is proposed. Performances of the SC-STD stage are verified by a 14-bit column-paralleled Successive-Approximation A/D converter which is fabricated 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 THD of the SC-STD circuit is up to -94dB at a 1V Vpp input of 1.009 KHz.
Keywords :
CMOS integrated circuits; analogue-digital conversion; focal planes; operational amplifiers; readout electronics; A/D conversion; CMOS-based process technology; CTIA; IRFPA ROIC; SC-STD; capacitive transimpedance amplifier; column-paralleled successive-approximation A/D converter; differential signals; frequency 1.009 kHz; frequency 31.25 kHz; infrared focal plane array; readout integration circuit; single phase clock; size 0.35 mum; switched-capacitor common-mode feedback; switched-capacitor single-ended to differential; word length 14 bit; Accuracy; Arrays; Capacitance; Clocks; Switches; Switching circuits; Voltage control;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467719
