An Analog Front-End IC Design for 320 x 240 Microbolometer Array Applications
- Authors
- Seo, Il Won; Jung, Eun Sik; Sung, Man Young
- Issue Date
- 11월-2015
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Image sensor; infrared (IR) ray; microbolometer; readout integrated circuit (IC)
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v.62, no.11, pp.1048 - 1052
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
- Volume
- 62
- Number
- 11
- Start Page
- 1048
- End Page
- 1052
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/91963
- DOI
- 10.1109/TCSII.2015.2455391
- ISSN
- 1549-7747
- Abstract
- We propose an analog front-end integrated circuit (IC) design for a readout IC (ROIC), which applies a fixed-voltage-bias sensing method with a capacitance transimpedance amplifier (CTIA) to an input stage in order to simplify the circuit structure of the ROIC and the IR sensor characteristic control. For a sample-and-hold stage, in order to display and control a signal detected by the IR sensor using a 2-D focal plane array, a differential delta sampling circuit is proposed, which effectively removes the fixed pattern noise. In addition, a two-stage variable-gain amplifier equipped with a rail-to-rail fully differential operational amplifier is applied to the ROIC to achieve high voltage sensitivity. The output characteristic of the proposed device is 30.84 mV/K and the linearity error rate is less than 0.07%. After checking the performance of the ROIC using an HSPICE simulation, the chip is manufactured and measured using the United Microelectronics Corporation Japan 0.35-mu m standard CMOS process to confirm that the simulation results from the actual design are in close agreement with the measurement results.
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