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US 2024/0146272 A1Published application
Optimized Multi Gain LNA Enabling Low Current and High Linearity Including Highly Linear Active Bypass
AssigneepSemi Corporation
InventorsEmre Ayranci, Miles Sanner
Life of this patent
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Abstract
An LNA having a plurality of paths, each of which can be controlled independently to achieve a gain mode. Each path includes at least an input FET and an output FET coupled in series. A gate of the output FET is controlled to set the gain of the LNA. Signals to be amplified are applied to the gate of the input FET. Additional stacked FETs are provided in series between the input FET and the output FET.
Claims20
A low noise amplifier (LNA) comprising:
- an input port;
- an output port;
- an amplifier circuit coupled to the input port and the output port, wherein the amplifier circuit comprises a plurality of transistors configured to selectively provide an output signal to the output port based on an input signal received at the input port;
- a bypass path coupled to the input port and the output port and configured to selectively provide the input signal from the input port to the output port;
- and
- a capacitor circuit and/or an inductor circuit:
- wherein the capacitor circuit is coupled to a first transistor of the plurality of transistors and has a first terminal and a second terminal, wherein the capacitor circuit comprises:
- a capacitive element between the first terminal and the second terminal;
- and
- a capacitor switch between the first terminal and the second terminal and connected in series with the capacitive element and wherein the inductor circuit comprises:
- a first inductive element coupled between ground and the first transistor;
- and
- an inductor switch coupled in parallel with at least a portion of the first inductive element.
10 more elements
A method of adjusting a gain mode of a low noise amplifier (LNA), the method comprising:
- selectively coupling a capacitive element of the LNA between a gate and a source of a first transistor of a plurality of transistors of the LNA to adjust the gain mode of the LNA;
- selectively shorting at least a portion of an inductive element of the LNA to ground to adjust the gain mode of the LNA, wherein the inductive element is coupled between ground and the first transistor;
- selectively providing, by the plurality of transistors, an output signal to an output port of the LNA based on an input signal received at an input port of the LNA, the selectively coupling, and the selectively shorting;
- and
- selectively providing, via a bypass path coupled to the input port and the output port, the input signal from the input port to the output port.
2 more elements
A low noise amplifier (LNA) comprising:
- means for selectively coupling a capacitive element of the LNA between a gate and a source of a first transistor of the LNA to adjust a gain mode of the LNA;
- means for selectively shorting at least a portion of a first inductive element of the LNA to ground to adjust the gain mode of the LNA, wherein the first inductive element is coupled between ground and the first transistor;
- means for selectively providing an output signal to an output port of the LNA based on an input signal received at an input port of the LNA, the means for selectively coupling, and the means for selectively shorting;
- and
- means for selectively providing the input signal from the input port to the output port.
2 more elements
Dependencies are inferred from the claim text.