Title :
A 14-bit Column-level ADC for IRFPA
Author :
Zhang Yajing ; Lu Wengao ; Chang Yikun ; Chu Hai ; Wang Guannan ; Zhang Yacong ; Chen Zhongjian
Author_Institution :
Dept. of Microelectron., Peking Univ., Beijing, China
Abstract :
A 14-bit Column-level ADC for Infrared Focal Plane Array (IRFPA) is proposed in this paper. Correlated switch structure is designed, which helps to cancel the offset generated by injected charge and then achieves accurate sampling and holding. Odd-even structure is realized to make longer converting time after sampling. Comparators with two-stage pre amplifiers use low power supply voltages, which ensures low power operation, as well as low noise. Conversion accuracy of the ADC circuit can reach 14-bit. The structure is used for a 640×512 array.
Keywords :
analogue-digital conversion; comparators (circuits); focal planes; infrared detectors; low-power electronics; network synthesis; power supply circuits; preamplifiers; IRFPA; column-level ADC; comparator; correlated switch structure design; holding accuracy; infrared focal plane array; injected charge; low power supply voltage; odd-even structure; offset generation cancellation; sampling accuracy; two-stage pre-amplifier; word length 14 bit; Accuracy; Arrays; Capacitance; Capacitors; Noise; Periodic structures; Switches; A/D conversion; Odd-even; injected charge offset; low power and noise; two-stage;
Conference_Titel :
Electron Devices and Solid State Circuit (EDSSC), 2012 IEEE International Conference on
Conference_Location :
Bangkok
Print_ISBN :
978-1-4673-5694-7
DOI :
10.1109/EDSSC.2012.6482833
