Variable passive components with high resolution value selection and control
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United States of America Patent
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Apr 28, 2009
Grant Date -
Jul 31, 2008
app pub date -
Mar 31, 2008
filing date -
Nov 7, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present system provides a method for varying the value of passive components in electronic circuits. Passive components can range from basic resistors, capacitors, and inductors to complex, structures such as transmission lines and resonant cavities. Value selection and variation can either be dynamically performed during circuit operation or as a one-time part of the manufacturing process as determined by the requirements of the specific application. A digital-to-analog converter (DAC) circuit is used to input value selection data digitally, and control value selection with value resolution dependent on the resolution of the DAC. An alternate embodiment is provided for high frequency operation.
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