Photodiode integrated circuit having multiple gain states

Details Photodiode integrated circuit having multiple gain states Photodiode integrated circuit having multiple gain states

2007-02-20

2007-02-20

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including atomic particle or radiant energy impinging on a...

C330S086000

Reexamination Certificate

active

11107205

ABSTRACT:
Disclosed herein is a PhotoDiode Integrated Circuit (PDIC) having multiple gain states. The PDIC includes a current-voltage conversion unit, an input amplification stage circuit, a reference resistance unit, a feedback resistance unit, and a switching unit. The current-voltage conversion unit converts a current signal into a voltage signal. The input amplification stage circuit is connected to the current-voltage conversion unit to receive and amplify the voltage signal. The reference resistance unit is connected to the second input terminal of the input amplification stage circuit. The output amplification stage circuit is connected to the output terminal of the input amplification stage circuit. The feedback resistance unit is connected in parallel between the second input terminal and the output terminal of the output amplification stage circuit, and is configured to have a plurality of resistance elements. The switching unit selectively connects the plurality of resistance elements.

REFERENCES:
patent: 5812030 (1998-09-01), Inami et al.
patent: 6246282 (2001-06-01), Oono et al.
patent: 2005/0062543 (2005-03-01), Mayampurath et al.
Patent Abstracts of Japan for JP2000-138548 A published May 16, 2000.

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