Radio frequency switch circuit and method for controlling circuit
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United States of America Patent
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Nov 8, 2022
Grant Date -
Jul 22, 2021
app pub date -
Nov 19, 2020
filing date -
Jan 19, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A radio frequency switch circuit includes a negative voltage generating circuit, a notch network, a logic control circuit, and a radio frequency switching circuit. The logic control circuit can be configured to, upon being driven by the negative voltage signal generated by the negative voltage generating circuit, control the operating modes of the radio frequency switching circuit; and the notch network is connected between the negative voltage generating circuit and the logic control circuit. As such, the influence of radio frequency signals generated by the radio frequency switching circuit can be filtered through the notch network, and the interference of radio frequency signals to the negative voltage generating circuit can be reduced, thereby improving the performance of the radio frequency switch circuit, for example in insertion loss, isolation and harmonic suppression.
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