Apple inc. (20240429962). GATE-TO-CASCODE COUPLED INDUCTOR-BASED LNA FOR NOISE REDUCTION AND NEUTRALIZATION

GATE-TO-CASCODE COUPLED INDUCTOR-BASED LNA FOR NOISE REDUCTION AND NEUTRALIZATION

Organization Name

apple inc.

Inventor(s)

Hongrui Wang of San Jose CA (US)

Abbas Komijani of Mountain View CA (US)

Ali Parsa of Poway CA (US)

GATE-TO-CASCODE COUPLED INDUCTOR-BASED LNA FOR NOISE REDUCTION AND NEUTRALIZATION

This abstract first appeared for US patent application 20240429962 titled 'GATE-TO-CASCODE COUPLED INDUCTOR-BASED LNA FOR NOISE REDUCTION AND NEUTRALIZATION

Original Abstract Submitted

in some source degeneration-based cascode lnas, a cascode transistor may contribute a large portion of noise at mmwave frequencies due to lower output impedance from a bottom transistor (e.g., amplifying transistor or transconductance transistor) of the cascode. the cascode noise may negatively impact performance of the lna. a first inductor (e.g., cascode inductor) may be coupled to the source of the cascode transistor and a second inductor (e.g., notch inductor) may be coupled to the gate of the bottom transistor such that the cascode inductor and a notch inductor inductively couple to each other, introducing a reverse-transmission zero in-band to reduce or eliminate cascode noise contribution and neutralize gate-drain capacitance of the bottom transistor with minimal area consumption.