Methods and apparatus for active termination of high-frequency signals
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United States of America Patent
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Aug 30, 2005
Grant Date -
Jan 20, 2005
app pub date -
Jul 16, 2003
filing date -
Jul 16, 2003
priority date (Note) -
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Abstract
An integrated circuit, comprising: at least one main circuit operable to perform one or more functions, and including at least one I/O node for receiving or transmitting an operating signal; an active termination circuit having first and second MOSFETs of the same type coupled in series across a Vdd node of a first source potential and a Vss node of a second source potential, the at least one I/O node being coupled to a common node between the first and second MOSFETs; and a control circuit operable to bias the first and second MOSFETs such that they exhibit a controlled impedance at the common node.
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