High isolation radio frequency switch
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United States of America Patent
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Sep 28, 2021
Grant Date -
N/A
app pub date -
Jul 16, 2020
filing date -
Jul 16, 2020
priority date (Note) -
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Abstract
A radio frequency (RF) switch circuit is provided. The switch includes a branch configured and arranged to transfer an RF signal coupled at an input node to an output node when a control signal is at a first logic value. A first transistor in the branch includes a first current electrode coupled at the input node and a second current electrode coupled to an intermediate node. The first transistor is formed in a first isolation well coupled to a bias voltage supply terminal. A second transistor in the branch includes a first current electrode coupled to the second current electrode of the first transistor at the intermediate node and a second current electrode coupled at the output node. The second transistor is formed in a second isolation well coupled to the bias voltage supply terminal. A third transistor includes a first current electrode coupled at the first intermediate node and a second current electrode coupled at a first supply terminal.
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