CONTROL FOR RADIO-FREQUENCY AMPLIFIER
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Aug 6, 2024
filing date -
Aug 6, 2024
priority date (Note) -
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Abstract
In some embodiments, an amplifier system can include an amplifier circuit having first and second amplifiers configured to amplify respective first and second portions of an input signal. Each of the first and second amplifiers can include a cascode stage with input and output transistors arranged in a cascode configuration. The amplifier system can further include an envelope tracking bias circuit coupled to the amplifier circuit and configured to provide a bias signal to the output transistor of the cascode stage of at least one of the first and second amplifiers. The amplifier system can further include a supply circuit configured to provide a non-envelope tracking supply voltage to the output transistor of the cascode stage of the at least one of the first and second amplifiers.
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