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Proceedings Paper

Feedback Direct Injection Current Readout For Infrared Charge-Coupled Devices
Author(s): K. Kubo; H. Wakayama; N. Kajihara; K. Awamoto; Y. Miyamoto
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Paper Abstract

We are proposing current readout for infrared charge coupled devices (IRCCDs) which can operate at higher temperatures. Feedback direct injection (FDI) consists of a simple amplifier of gain, A<1, connected to a photodiode and a conventional direct injection (DI) circuit. The amplifier feeds the source voltage of an input field-effect transistor back to the photodiode, making the diode's resistance effectively 1/(1-A) times larger. This improves conventional direct injection current readout efficiency. FDI was used in a medium-wavelength IRCCD operating at a high temperature. We made a 64-element HgCdTe linear IRCCD using FDI. The device operates at 195 K with an NETD of 0.5 K.

Paper Details

Date Published: 8 January 1990
PDF: 9 pages
Proc. SPIE 1157, Infrared Technology XV, (8 January 1990); doi: 10.1117/12.978611
Show Author Affiliations
K. Kubo, Fujitsu Laboratories Ltd. (Japan)
H. Wakayama, Fujitsu Laboratories Ltd. (Japan)
N. Kajihara, Fujitsu Laboratories Ltd. (Japan)
K. Awamoto, Fujitsu Laboratories Ltd. (Japan)
Y. Miyamoto, Fujitsu Laboratories Ltd. (Japan)

Published in SPIE Proceedings Vol. 1157:
Infrared Technology XV
Irving J. Spiro, Editor(s)

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