Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2008-03-19
2010-02-23
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S337000, C327S554000, C341S122000
Reexamination Certificate
active
07667501
ABSTRACT:
A sampling circuit according to correlated double sampling to generate a difference of two voltages at a sampling node, with the second voltage representing the sum of an input signal and an offset, and the first voltage representing the offset alone. In an embodiment, a first capacitor is charged to the first voltage in a first phase. A second capacitor is then charged to the second voltage in a second phase. In a third phase, the first capacitor is coupled to the input terminal of the amplifier and the second capacitor is coupled between the input and output terminals of the amplifier to cause the amplifier to generate the difference of the first and second voltages. The first capacitor has a capacitance much less than the second capacitor, thereby minimizing the noise power at the output of the amplifier.
REFERENCES:
patent: 6069505 (2000-05-01), Babanezhad
patent: 6791378 (2004-09-01), Rossi
patent: 2004/0232948 (2004-11-01), Rossi
Mandal Dipankar
Surendranath Nagesh
Brady III Wade J.
Goyal Shikha
Nguyen Long
Patti John J.
Telecky , Jr. Frederick J.
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