Amplifiers – With periodic switching input-output
Reexamination Certificate
2005-04-19
2005-04-19
Callahan, Timothy P. (Department: 2816)
Amplifiers
With periodic switching input-output
C330S260000, C327S341000, C327S562000
Reexamination Certificate
active
06882218
ABSTRACT:
A system for receiving signals (e.g., optical signals) includes an input device, an amplification device, and a feedback device. The amplification device receives a signal from the input device and includes a transimpedance portion. The transimpedance portion includes a first section having a plurality of elements (e.g., resistors and transistors) and a second section having a plurality of elements (e.g., resistors and transistors). One or more of the elements (e.g. transistors or resistors) in the first and second sections are mismatched to introduce a systematic offset in the transimpedance stage, to make the net input referred offset of the amplification device unidirectional. The feedback device (e.g. an integrator) is coupled to an output of the amplification device and an input of the transimpedance portion to provide a unidirectional offset correction to the amplification device for reduced noise enhancement.
REFERENCES:
patent: 4050086 (1977-09-01), Harr
patent: 4270092 (1981-05-01), Christopherson
patent: 4529947 (1985-07-01), Biard et al.
patent: 4545076 (1985-10-01), Biard et al.
patent: 4724315 (1988-02-01), Goerne
patent: 5025456 (1991-06-01), Ota et al.
patent: 5132609 (1992-07-01), Nguyen
patent: 5345073 (1994-09-01), Chang et al.
patent: 5430765 (1995-07-01), Nagahori
patent: 5455705 (1995-10-01), Gusinov
patent: 5471665 (1995-11-01), Pace et al.
patent: 5508645 (1996-04-01), Castellucci et al.
patent: 5539779 (1996-07-01), Nagahori
patent: 5612810 (1997-03-01), Inami et al.
patent: 5689407 (1997-11-01), Marinus et al.
patent: 5777507 (1998-07-01), Kaminishi et al.
patent: 6018407 (2000-01-01), Hatakeyama et al.
patent: 6160450 (2000-12-01), Eschauzier et al.
patent: 6175438 (2001-01-01), Agarwal et al.
patent: 6262625 (2001-07-01), Perner et al.
patent: 6275541 (2001-08-01), Nagahori et al.
patent: 6342694 (2002-01-01), Satoh
patent: 6388521 (2002-05-01), Henry
patent: 6404281 (2002-06-01), Kobayashi
patent: RE37944 (2002-12-01), Fielder et al.
patent: 6525604 (2003-02-01), Eckert et al.
patent: 6583671 (2003-06-01), Chatwin
patent: 6720830 (2004-04-01), Andreou et al.
patent: 6750712 (2004-06-01), Hoang
patent: 0736 968 (1996-10-01), None
Copy of European Search Report for European Appln. 03019210.8-2215 dated Oct. 28, 2004.
Broadcom Corporation
Callahan Timothy P.
Nguyen Hai L.
Sterne Kessler Goldstein & Fox P.L.L.C.
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