Photoreceptor amplifier circuit and optical pickup

Details Photoreceptor amplifier circuit and optical pickup Photoreceptor amplifier circuit and optical pickup

2007-08-21

2007-08-21

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

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

Reexamination Certificate

active

11177455

ABSTRACT:
A photoreceptor amplifier circuit comprises a differential amplifier circuit, which includes a differential transistor pair constituted of two transistors and active loads corresponding to said differential transistor pair, said differential amplifier circuit outputting a voltage according to an output current of a photoreceptor. The photoreceptor amplifier circuit further comprises a correcting current generation circuit for generating a correcting current based on a current difference between said two transistors and supplying the correcting current to said differential amplifier circuit.

REFERENCES:
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patent: 2004/0184387 (2004-09-01), Shirasaka et al.
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patent: 2000-114888 (2000-04-01), None
patent: 2005-094149 (2005-04-01), None

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