A novel low-power readout structure with 1/2 sub-scan time-delay-integration and DLL-based A/D for 10246 infrared focal plane array
This paper presents a new low-power readout structure for 10246 infrared focal plane array with 1/2 sub-scan time-delay-integration (TDI) and delay-locked-loop-based (DLL-based) analog-to-digital (A/D) function. The circuit is of low power for its passive sampling, delay, and summation completed by...
Saved in:
Published in | IEEE International Conference on Circuits and Systems (Online) pp. 2519 - 2522 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
01.05.2016
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | This paper presents a new low-power readout structure for 10246 infrared focal plane array with 1/2 sub-scan time-delay-integration (TDI) and delay-locked-loop-based (DLL-based) analog-to-digital (A/D) function. The circuit is of low power for its passive sampling, delay, and summation completed by capacitor array. Multiple-capacitor structure is also used to make the circuit suffer less from capacitor mismatch. 1/2 sub-scan function and the distribution of detector array contribute to higher resolution in the direction both along the track and across the track. And the TDI function is combined with A/D process in terms of circuit structure and timing sequence, reducing the noise and enhancing the frame rate. The 14-bit ADC is divided into coarse quantization part and fine quantization part. The former is a conventional 11-bit single-ramp ADC and the latter is realized by 8-phase clocks generated by DLL. This circuit also supports bidirectional scanning and two types of detectors whose photo-current flows into or out of the readout circuit. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Conference-1 ObjectType-Feature-3 content type line 23 SourceType-Conference Papers & Proceedings-2 |
ISSN: | 2379-447X |
DOI: | 10.1109/ISCAS.2016.7539105 |