Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-03-15
IEEE Trans.Electron.Dev. 51 (2004) 270-278
Astronomy and Astrophysics
Astrophysics
22 pages, 7 figures, 4 tables
Scientific paper
10.1109/TED.2003.821764
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 0.5$mu$m 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 10$mu$W. The noise at the output showed a$1/rm f$noise spectrum of 4$mu$V/$surdhbox Hz$at 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.
Hibi Yasunori
Hirao Takanori
Kawada Mitsunobu
Nagata Hirohisa
Nakagawa Takao
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