Optical receiver with multiple transimpedance amplifiers

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United States of America Patent

PATENT NO 9794001
APP PUB NO 20170201327A1
SERIAL NO

14990723

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Abstract

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A method and system for amplifying small optical currents in an optical receiver front end system may employ multiple transimpendance amplifiers (TIAs) and feedback control loops. For example, the front end system may include a main feedback control loop (having a main TIA) and a replica feedback control loop (having a replica TIA) that, collectively, generate an optimum input common mode level for a differential amplifier operating at high data rates (e.g., speeds up to tens of gigabits per second). The replica TIA may track the noise from the power supply of the optical receiver in the substantially same manner as the main TIA. Therefore, the differential signals produced by the main control loop may not be degraded at the input to the high-speed differential amplifier. The outputs of the high-speed differential amplifier may be symmetric about the common mode level and may be suitable inputs for voltage sampling.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FUJITSU LIMITEDKAWASAKI18047

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Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
* 2015/0338,269 OFFSET CURRENT COMPENSATION FOR PHOTODIODES 1 2014
 
INTEL CORPORATION (1)
* 2005/0232,637 Optical offset signal cancellation for optical receiver 2 2004
 
CALIFORNIA INSTITUTE OF TECHNOLOGY (1)
* 2013/0294,546 DOUBLE-SAMPLING RECEIVER WITH DYNAMIC OFFSET MODULATION FOR OPTICAL AND ELECTRICAL SIGNALING 6 2013
 
SILICON VALLEY BANK (1)
* 2013/0127,535 Method and System for Optoelectronic Receivers for Uncoded Data 1 2013
 
University College Cork, National University of Ireland (1)
* 2013/0121,707 LINEAR BURST MODE RECEIVER 3 2011
 
OPTIUM CORPORATION (1)
* 2010/0054,758 Optical Receiver With Threshold Voltage Compensation 5 2008
* Cited By Examiner

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