High-frequency amplifier circuitry

Abstract

A high-frequency amplifier circuitry includes a capacitor, a first transistor, a second transistor, and an ESD. The capacitor has one end connected to an input node. The first transistor has a gate connected to another end of the capacitor, and has a source grounded via an inductor. The second transistor is cascode-connected with the first transistor, has a gate grounded in a high-frequency manner, and outputs from a drain thereof a signal made by amplifying a signal output from a drain of the first transistor. The ESD protection circuitry includes a plurality of PN junction diodes, has a first terminal connected to the input node, has a second terminal grounded, and has a third terminal connected to the source of the first transistor.

Dependencies are inferred from the claim text.