Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Reexamination Certificate
2006-04-04
2006-04-04
Nguyen, Linh V. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
C341S144000
Reexamination Certificate
active
07023367
ABSTRACT:
A current source cell includes a current source providing a first current at a first node where variations of a first voltage at the first node results in variations of the first current, and first and second switches coupled between the first node and respective first and second output terminals. A control signal is coupled to selectively apply a first drive voltage to a selected one of the first and second switches to close the selected switch to steer the first current to the corresponding output terminal. The current source cell further includes a voltage adjustment circuit coupled to detect variations in the first voltage and vary the first drive voltage in response to the variations in the first voltage. The first drive voltage applied to the selected switch is varied to reduce the variations in the first voltage, thereby maintaining the first voltage at a substantially stable voltage value.
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Cook Carmen C.
National Semiconductor Corporation
Nguyen Linh V.
Patent Law Group LLP
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