Infrared detecting circuit and an infrared detector

Details Infrared detecting circuit and an infrared detector Infrared detecting circuit and an infrared detector

2006-10-31

2006-10-31

Hannaher, Constantine (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

07129487

ABSTRACT:
An infrared detecting circuit is provided with a current-to-voltage converting circuit including a capacitor connected with an inverting input terminal and an output terminal of an operational amplifier and a resistance circuit element connected in parallel with the capacitor, an inverting amplifying circuit connected with an output side of the current-to-voltage converting circuit, a band-pass filter circuit connected with an output side of the voltage amplifying circuit, and an output circuit connected with an output side of the band-pass filter circuit. The infrared detecting circuit and an infrared detector including this circuit can be miniaturized.

REFERENCES:
patent: 5949072 (1999-09-01), Takada et al.
patent: 6313462 (2001-11-01), Matsuda et al.
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patent: 07035872 (1995-02-01), None
patent: 2001099707 (2001-04-01), None
Schouten , “A New Amplifier Design for Fast Low-Noise Far-Infrared Detectors Using a Pyroelectric Element”, published on Apr. 1, 1998, in Bristol, GB by Measurement Science and Technology, IOP Publishing, pp. 686-691.
Lacanette, “A Basic Introduction to Filters—Active, Passive, and Switched-Capacitor” (Application Note 779), published on Apr. 1, 1991, in the U.S.A. by National Semiconductor Corporation, pp. 1-22.
English language Abstract of JP 3-269390.

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