A new CMOS readout circuit for uncooled bolometric infrared focal plane arrays

Author

Tsung-Hsin Yu ; Chung-Yu Wu ; Pei-Yen Chen ; Jiunn-Jye Luo ; Cheng Der Chiang ; Ya-Tung Cherng

Author_Institution

Inst. of Electron., Nat. Chiao Tung Univ., Hsinchu

Volume

2

fYear

2000

fDate

2000

Firstpage

493

Abstract

By incorporating the basic constant current (CC) configuration with the buffered direct injection (BDI) structure, a new readout circuit called the constant current buffered direct injection (CCBDI) is proposed for the uncooled bolometer detector FPAs. Due to the use of BDI structure, the offset is decreased and the linearity range is increased. Thus linearity, dynamic range, and uniformity are improved. An experimental chip of 64×64 CCBDI FPA readout circuit has be designed and fabricated by using 0.5 μm double-poly double-metal n-well CMOS technology with the cell size of 50×50 μm². The measured linearity is 94.36% whereas the measured uniformity is 81.3%. Both measurement and simulation results have verified the advantageous features of the proposed CCBDI readout circuit. It is believed that the new CCBDI structure has a great potential in the applications of large uncooled bolometer FPAs

Keywords

CMOS integrated circuits; bolometers; focal planes; readout electronics; 0.5 micron; 4096 pixel; 64 pixel; CMOS readout circuit; FPAs; buffered direct injection; cell size; constant current configuration; double-poly double-metal n-well CMOS; dynamic range; linearity range; uncooled bolometric infrared focal plane arrays; uniformity; Bolometers; CMOS technology; Circuits; Infrared detectors; Linearity; Micromachining; Resistors; Semiconductor device measurement; Temperature; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on

Conference_Location

Geneva

Print_ISBN

0-7803-5482-6

Type

conf

DOI

10.1109/ISCAS.2000.856373

Filename

856373