Multi-band low noise amplifier with a shared degeneration inductor

An apparatus comprising:

• means for amplifying first signal components within a first frequency band of a radio frequency signal;
• means for amplifying second signal components within a second frequency band of the radio frequency signal;
• means for amplifying third signal components within a third frequency band of the radio frequency signal;
• and
• means for generating an inductance having a first tapping point, a second tapping point, and a third tapping point, the first tapping point coupled to the means for amplifying the first signal components, the second tapping point coupled to the means for amplifying the second signal components, and the third tapping point coupled to the means for amplifying the third signal components.

A method comprising:

• selecting at least one of a plurality of paths, the plurality of paths including:
• a first path including a first transistor that is configured to amplify first signal components within a first frequency band of a radio frequency signal, the first transistor coupled to a first tapping point of a degeneration inductor;
• a second path including a second transistor that is configured to amplify second signal components within a second frequency band of the radio frequency signal, the second transistor coupled to a second tapping point of the degeneration inductor;
• and
• a third path including a third transistor that is configured to amplify third signal components within a third frequency band of the radio frequency signal, the third transistor coupled to a third tapping point of the degeneration inductor;
• and
• amplifying corresponding signal components of the radio frequency signal at a corresponding transistor of the selected path.