High-linearity low noise amplifier
AssigneeIntel Corporation
InventorsJon S. Duster, Stewart S. Taylor
Life of this patent
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Abstract
Embodiments of a high-linearity low-noise amplifier (LNA) are generally described herein. Other embodiments may be described and claimed. In some embodiments, an RF input signal may be amplified with a cascode amplifier. The cascode amplifier may include integrated notch filters to attenuate undesired signals. The cascode amplifier may operate from a large power supply when blockers are present to avoid voltage swing compression at its output. The cascode amplifier may be biased and designed to operate in a class AB mode to produce linear output current to avoid current compression or excessive current expansion.
Claims20
A low-noise amplifier (LNA) comprising:
- a cascode amplifier;
- an integrated notch filter to attenuate undesired signals;
- and
- a power supply that operates at a high voltage when undesired signals are present.
A low-noise amplifier (LNA) comprising:
- a CMOS cascode amplifier, wherein the CMOS cascode amplifier comprises a common-source transistor coupled with a common-gate transistor, wherein the common-source transistor is biased and designed to operate in a class AB mode to produce a linear output current;
- an integrated notch filter to attenuate undesired signals;
- a power supply that operates at a high voltage when undesired signals are present, the power supply to operate at a lower voltage when undesired signals are not present;
- and
- circuitry to detect undesired signals and adjust the power supply voltage.
A receiver comprising a low-noise amplifier (LNA) to amplify an RF signal received through an antenna, wherein the LNA comprises a CMOS cascode amplifier, the CMOS cascode amplifier integrating a notch filter to attenuate undesired signals, the CMOS cascode amplifier operating from a large power supply, the CMOS cascode amplifier biased and designed to operate in a class AB mode to produce linear output current, and wherein the LNA is coupled with the antenna without a pre-select filter between the LNA and the antenna.
Dependencies are inferred from the claim text.