Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2007-03-06
2007-03-06
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C341S122000
Reexamination Certificate
active
11034990
ABSTRACT:
Embodiments of the current-mode track and hold circuit comprise a cascode input stage, a dynamic biasing stage, a cascode output stage, and a switch operable to interconnect the input stage and the output stage. The input stage is connected to receive an input current. The dynamic biasing stage is connected to receive a scaled version of the input current as a dynamic biasing current and dynamically biases the input stage in response to the dynamic biasing current. Dynamically biasing the track-and-hold circuit in response to a dynamic biasing current that is a scaled version of the input current significantly increases the maximum peak-to-peak voltage swing allowed at the input of the track-and-hold circuit and enables a corresponding increase in signal-to-noise ratio. These benefits are obtained at the expense of only a small increase in power consumption.
REFERENCES:
patent: 4866368 (1989-09-01), Bird
patent: 5227676 (1993-07-01), Bahr et al.
patent: 5418408 (1995-05-01), Mangelsdorf et al.
patent: 5963158 (1999-10-01), Yasuda
Agilent Technologies
Callahan Timothy P.
Englund Terry L.
Hardcastle Ian
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