Active resistors for reduction of transient power grid noise
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United States of America Patent
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Issued Date -
Jan 25, 2007
app pub date -
Jul 7, 2005
filing date -
Jul 7, 2005
priority date (Note) -
Abandoned
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Abstract
Active resistors for reduction of transient power grid noise. An active resistance added in parallel to the operating circuit blocks of a semiconductor device. This resistance increases the damping ratio of the power grid, which in turn decreases the number and the magnitude of oscillations and/or noise resulting from step disturbances of the power supply current. The active resistance can implemented by a transistor connected to a bias voltage. Alternatively, the active resistance can be implemented by a drive transistor with a gain stage, or two active resistors where one responds to overshoots in the current flow and the second active resistor responds to droops in the current flow.
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