Radio-frequency switches having extended termination bandwidth and related circuits, modules, methods, and systems
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United States of America Patent
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May 24, 2016
Grant Date -
Feb 11, 2016
app pub date -
Aug 13, 2015
filing date -
Nov 9, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Circuits and methods related to a switch having extended termination bandwidth are disclosed. A switch having an input end and an output end, and capable of being in an ON state and an OFF state, can include a termination circuit configured to yield an extended frequency bandwidth in which a desired OFF state termination impedance is provided. A termination circuit may include two or more electrically parallel resistor-capacitor branches coupled to the switch input or output end. A switch termination circuit may provide an OFF state termination impedance that is substantially equal to the switch ON state termination impedance. Also, a termination circuit may enable a desired termination impedance without sacrificing other switch performance features, including insertion loss, isolation, or VSWR difference between ON and OFF states. Also disclosed are examples of how the foregoing features can be implemented in different products and methods of fabrication.
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