Method and system for impedance matched switching
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United States of America Patent
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Jun 7, 2005
Grant Date -
Sep 23, 2004
app pub date -
Mar 17, 2003
filing date -
Mar 17, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for impedance matched switching of an input signal from an input source includes a first switch, such as an FET, for controllably switching the input signal from an input terminal connected to the input source to an output terminal, the switching being controlled according to a control voltage. The system further includes a second switch, such as an FET, for controllably switching a matching impedance between the input terminal and ground according to the control voltage. When the input signal is prevented from passing from the input terminal to the output terminal by the first switch, the input signal passes through the matching impedance, which has an impedance characteristic substantially matched to an impedance characteristic of the input source.
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