Photo-receiving amplifier element, optical pickup unit, and...

Details Photo-receiving amplifier element, optical pickup unit, and... Photo-receiving amplifier element, optical pickup unit, and...

2007-12-04

2007-12-04

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

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

C250S2140AG

Reexamination Certificate

active

11180710

ABSTRACT:
A feedback resistor of a feedback circuit included in a photo-receiving amplifier element is formed on an island region in which an electric potential is in a floating state. The island region is electrically isolated from an island region on which an element other than the feedback resistor is formed. This enables the response speed of the photo-receiving amplifier element to be increased without changing the process of the circuit or varying a resistance value of the feedback resistor in a first-stage amplifier unit.

REFERENCES:
patent: 4079337 (1978-03-01), Lundgren et al.
patent: 5592124 (1997-01-01), Mullins et al.
patent: 2000-315922 (2000-11-01), None
patent: 2002-261549 (2002-09-01), None

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