Switched impedance transformer for semiconductor circuits
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United States of America Patent
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Nov 10, 2009
Grant Date -
Jun 12, 2008
app pub date -
Dec 11, 2006
filing date -
Dec 11, 2006
priority date (Note) -
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Abstract
A method of providing an impedance match for an integrated semiconductor circuit to other microwave elements is provided by allowing the selection of one of a plurality of impedance matching ratios between the circuit and other elements. The tunable impedance match comprises a microwave impedance transformer with at least a single primary winding, and a plurality of secondary windings, wherein the winding configuration is determined by an electrical switching apparatus allowing the secondary windings to be connected in series, parallel and combinations thereof to provide the required impedance matching. The method allows for both dynamic matching of an integrated semiconductor circuit for increased efficiency, and hence reduced power consumption, and directly matching said circuit to high impedance antennae etc.
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