ISSN 1002-1027  CN 11-2952/G2

Acta scientiarum naturalium Universitatis Pekinensis

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Novel Low Power Column Stage Design of 302×288 Infrared ROIC

LIU Dan, LU Wengao, CHEN Zhongjian, JI Lijiu, ZHAO Baoying   

  • Received:2006-01-19 Online:2007-01-20 Published:2007-01-20

Abstract: A novel readout architecture for infrared (IR) readout integrated circuit (ROIC) is proposed. When the readout rate is 5MHz, the power of the column readout stage has been reduced from more than 47mW to 6.74mW, by applying master-slave column amplifier and the technology of divided-output-bus, which reduced more than 80%. In the master-slave readout structure, master amplifiers convert the charge to voltage, which has relaxed time limit. Slave amplifiers drive the output bus and ensure the readout rate, which adopts low power standby work mode. The technology of divided-output-bus is to divide the 320 pairs of switches to 20 groups and to reduce the switches connected to the output bus, which does help to reduce power dissipation of slave amplifiers.