Amplifiers – Signal feedback – Variable impedance in feedback path varied by separate...
Reexamination Certificate
2006-03-28
2006-03-28
Pascal, Robert (Department: 2817)
Amplifiers
Signal feedback
Variable impedance in feedback path varied by separate...
C330S308000
Reexamination Certificate
active
07019589
ABSTRACT:
A transimpedance amplifier includes a first amplifier, a first MOS resistor device and a first voltage divider circuit. The source terminal of the first MOS resistor device is coupled to the first amplifier inverting input. The voltage divider circuit is coupled between the first amplifier output and the non-inverting input. The output of the first voltage divider is coupled to the first MOS resistor drain terminal. A second amplifier, second MOS resistor device and a second voltage divider circuit is also provided. The output of the second amplifier is coupled to the gate terminal of the first MOS resistor device. The gate terminal of the second MOS resistor device is coupled to the second amplifier output. The drain terminal of the second MOS resistor device is coupled to the second amplifier non-inverting input. The second voltage divider circuit is coupled between the first amplifier output and the second MOS resistor device source terminal, and has an output coupled to the second amplifier inverting input.
REFERENCES:
patent: 5786730 (1998-07-01), Hadley
patent: 5994966 (1999-11-01), Stikvoort
patent: 6593810 (2003-07-01), Yoon
patent: 6703682 (2004-03-01), Aswell
patent: WO 01/47117 (2001-06-01), None
Aswell Cecil
Wiles, Jr. William W.
Locke Liddell & Sapp LLP
Nguyen Hieu
Pascal Robert
Texas Advanced Optoelectronic Solutions, Inc.
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