An analog front-end IC with regulated R-I amplifier and CDS CTIA for microbolometer

Jindeok Seo, Gyungtae Kim, Kyomuk Lim, Changho Seok, Hyunho Kim, Seunghyun Im, Ji Hoon Kim, Choul Young Kim, Hyoungho Ko

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

An analog front-end design that can improve the performance of the readout integrated circuit (ROIC) for the microbolometer infrared (IR) focal plane array (FPA) is presented. The analog front-end circuit for the microbolometer generally consists of the resistance-to-current (R-I) converter and the capacitive transimpedance amplifier (CTIA). The resistances of the microbolometer FPA are changed when absorbing IR. These resistance changes are converted to the output voltages by R-I converters and CTIAs. To eliminate the VTH-variations and to reduce the 1/f noise, a novel regulated R-I converter with current mirror amplifier and a correlated double sampled (CDS) CTIA are proposed. The output noise of the proposed design is -19.15 dB lower than conventional design at 1 Hz. The chip is designed using the standard 0.18 μm 1P6M CMOS process.

Original languageEnglish
Title of host publicationICCAS 2013 - 2013 13th International Conference on Control, Automation and Systems
Pages1312-1315
Number of pages4
DOIs
StatePublished - 2013
Event2013 13th International Conference on Control, Automation and Systems, ICCAS 2013 - Gwangju, Korea, Republic of
Duration: 20 Oct 201323 Oct 2013

Publication series

NameInternational Conference on Control, Automation and Systems
ISSN (Print)1598-7833

Conference

Conference2013 13th International Conference on Control, Automation and Systems, ICCAS 2013
Country/TerritoryKorea, Republic of
CityGwangju
Period20/10/1323/10/13

Keywords

  • analog front end
  • correlated double sampling
  • CTIA
  • infrared (IR) image sensor
  • infrared focal plane array
  • microbolometer
  • ROIC

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