AMPLIFIER CIRCUIT AND COMMUNICATION DEVICE
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United States of America
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Issued Date -
Feb 20, 2025
app pub date -
Nov 1, 2024
filing date -
Nov 1, 2024
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Abstract
An amplifier circuit includes a low-noise amplifier configured to amplify a radio-frequency signal, a switching circuit coupled between the low-noise amplifier and an antenna connection terminal, and a bias circuit configured to supply a direct-current bias voltage to the low-noise amplifier 11. The switching circuit includes a terminal coupled to the low-noise amplifier and a terminal coupled to the antenna connection terminal, and a transistor including a gate terminal and a p-type first substrate, configured to alternate the connection and disconnection between the terminals and in response to a voltage applied to the gate terminal. The bias circuit, the terminal, and the first substrate are coupled for direct-current conduction.
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