DC offset cancellation for a trans-impedance amplifier

Details DC offset cancellation for a trans-impedance amplifier DC offset cancellation for a trans-impedance amplifier

2008-05-06

2008-05-06

Lee, Benny (Department: 2817)

Amplifiers

With semiconductor amplifying device

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

Reexamination Certificate

active

07368999

ABSTRACT:
The invention relates to a DC offset cancellation circuit for a trans-impedance amplifier, which is typically used for converting an input current from a photodiode into an output voltage. The DC offset cancellation circuit utilizes the monitor current from a photodiode monitoring device to cancel the DC offset from the photodiode input current, enabling the conventional feedback circuit in the trans-impedance amplifier to be fully integrated.

REFERENCES:
patent: 5734300 (1998-03-01), Yoder
patent: 6329881 (2001-12-01), Tachigori
patent: 6404281 (2002-06-01), Kobayashi et al.
patent: 6504429 (2003-01-01), Kobayashi et al.
patent: 6771132 (2004-08-01), Denoyer et al.
patent: 6803825 (2004-10-01), Chiou et al.
patent: 6876259 (2005-04-01), Visocchi
patent: 7042295 (2006-05-01), Guckenberger et al.
patent: 7265333 (2007-09-01), Ichino et al.

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