DocumentCode :
1158755
Title :
A 1.2-V 12-b 120-MS/s SHA-Free Dual-Channel Nyquist ADC Based on Midcode Calibration
Author :
Choi, Hee-Cheol ; Kim, Young-Ju ; Ahn, Gil-Cho ; Lee, Seung-Hoon
Author_Institution :
Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea
Volume :
56
Issue :
5
fYear :
2009
fDate :
5/1/2009 12:00:00 AM
Firstpage :
894
Lastpage :
901
Abstract :
This paper describes a 12-b 120-MS/s dual-channel pipeline analog-to-digital converter (ADC) for high-speed video signal processing. A simple digital midcode calibration technique is proposed to eliminate an offset mismatch between two channels. The proposed sample-and-hold-amplifier-free architecture with correlated input sampling networks enables wideband signal sampling while effectively reducing a gain mismatch between channels. The prototype ADC implemented in a 0.13-??m CMOS technology achieves a peak signal-to-noise-and-distortion ratio of 61.1 dB and a peak spurious-free dynamic range of 74.7 dB for input frequencies up to 60 MHz at 120 MS/s. The measured differential and integral nonlinearities are within ??0.30 LSB and ??0.95 LSB, respectively. The ADC occupies an active die area of 0.56 mm2 and consumes 51.6 mW at a 1.2 V power supply.
Keywords :
CMOS integrated circuits; analogue-digital conversion; calibration; image sampling; video signal processing; SHA -free dual-channel Nyquist ADC; analog-to-digital converter; high-speed video signal processing; midcode calibration; power 51.6 mW; sample-and-hold-amplifier-free architecture; signal-to-noise ratio; size 0.13 mum; voltage 1.2 V; wideband signal sampling; Analog-to-digital converter (ADC); CMOS analog integrated circuit; comparator offset; dual channel; input sampling network; low power; midcode calibration; sample-and-hold amplifier (SHA) free; switched operational amplifier (op-amp);
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2009.2015200
Filename :
4783027
Link To Document :
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