Tunable Hybrid Wideband LNA Architecture
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United States of America Patent
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Issued Date -
Jan 4, 2024
app pub date -
Jun 30, 2022
filing date -
Jun 30, 2022
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Abstract
Circuits and methods for an LNA that enable selection of a first mode providing high gain with wide output impedance matching, and a second mode providing wideband output impedance matching with improved NF and linearity at moderate gain. Some embodiments allow multiple intermediate modes to enable selection of gain versus linearity and NF. One embodiment includes a matching network having an input terminal configured to be coupled to an amplified-signal terminal of an amplification core, and an output terminal, the matching network including a first inductor coupled between the input terminal and a first node; a second inductor coupled to the first node; a boosted amplification branch coupled between the input terminal and the output terminal; and a non-amplification branch coupled between the first node and the output terminal; wherein the boosted amplification branch is enabled in a first mode, and the non-amplification branch is enabled in a second mode.
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