High-frequency switch circuit and front-end circuit including same
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United States of America Patent
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Nov 1, 2022
Grant Date -
Oct 14, 2021
app pub date -
Apr 2, 2021
filing date -
Apr 9, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A high-frequency switch circuit includes a first switch configured to electrify or cut off connection between an antenna terminal and an input terminal, and a second switch configured to electrify or cut off connection between the antenna terminal and an output terminal. The first switch has a transmission line connecting the antenna terminal and the input terminal; a diode having an anode connected to a first node between the transmission line and the input terminal, and a cathode connected to a second node; and a capacitor connected to the second node and a first power supply voltage. A first control terminal is connected to the first node via a first resistor and a first inductor. The first switch further includes a charging/discharging circuit connected to a second power supply voltage and the first control terminal and charging and discharging the capacitor from the second node.
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