DC bias configuration for pin diode SPDT switch
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United States of America Patent
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Jul 5, 2022
Grant Date -
May 6, 2021
app pub date -
Oct 28, 2020
filing date -
Oct 31, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A transmit/receive switching assembly includes a symmetrical PIN diode-based switch to selectively connect an antenna port to one of a transmit port and a receive port, transmit bias control circuitry that receives a first bias control signal, receive bias control circuitry that receives a second bias control signal, and shunt bias control circuitry coupled between the symmetrical PIN diode-based switch and a reference node. The first and second bias control signals are simultaneously and oppositely switchable between first and second voltage values and together configured to operate the switch between a transmit mode where RF signal flow is enabled from the transmit port to the antenna port and isolation is provided between the antenna port and the receive port, and a receive mode where RF signal flow is enabled from the antenna port to the receive port and isolation is provided between the antenna port and the transmit port.
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