DocumentCode :
3750866
Title :
A 14-bit two-segment column-level ADC for remote sensing imaging
Author :
Guannan Wang;Wengao Lu;Dahe Liu;Yacong Zhang;Zhongjian Chen
Author_Institution :
National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Peking University, Beijing, 100871, China
Volume :
3
fYear :
2015
Firstpage :
1
Lastpage :
3
Abstract :
This paper proposes a 14-bit two-segment column-level ADC which is applied for remote sensing imaging system. The first segment accomplishes 6-bit coarse conversion by charge redistribution structure while the second segment uses a ramp to obtain the 8-bit fine conversion. Both segments adopt single-slope algorithm and the joint of two segments is well designed to avoid code missing or overlap, so the monotonicity is excellent. Segmentation and pre-judgment of MSB decrease the clock frequency of counter, which reduces the dynamic power dissipation and relieves the requirement of comparator´s speed. A 64×64 demo circuit is designed and fabricated in 0.35μm process. Simulation results reveal the average power of single column-level ADC is 160μW and SNR is 81.68dB.
Keywords :
"Radiation detectors","Capacitors","Power dissipation","Latches","Clocks","Imaging","Image segmentation"
Publisher :
ieee
Conference_Titel :
Microwave Conference (APMC), 2015 Asia-Pacific
Print_ISBN :
978-1-4799-8765-8
Type :
conf
DOI :
10.1109/APMC.2015.7413449
Filename :
7413449
Link To Document :
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