We have developed a new capacitive transimpedance amplifier (CTIA) that can be operated at 2 K, and have good performance as readout circuits of astronomical far-infrared array detectors. The circuit design of the present CTIA consists of silicon p-MOSFETs and other passive elements. The process is a standard Bi-CMOS process with 0.5mum design rule. The open-loop gain of the CTIA is more than 300, resulting in good integration performance. The output voltage swing of the CTIA was 270 mV. The power consumption for each CTIA is less than 10muW. The noise at the output showed a1/rmfnoise spectrum of 4muV/surdhboxHzat 1 Hz. The performance of this CTIA nearly fulfills the requirements for the far-infrared array detectors onboard ASTRO-F, Japanese infrared astronomical satellite to be launched in 2005.
@article{arxiv.astro-ph/0403342,
title = {Cryogenic Capacitive Transimpedance Amplifier for Astronomical Infrared Detectors},
author = {Hirohisa Nagata and Hiroshi Shibai and Takanori Hirao and Toyoki Watabe and Manabu Noda and Yasunori Hibi and Mitsunobu Kawada and Takao Nakagawa},
journal= {arXiv preprint arXiv:astro-ph/0403342},
year = {2009}
}