Amplifier circuit and transmitting device

Abstract

According to one embodiment, an amplifier circuit includes N (N>=3) transistors, two first branches and N−2 second branches. The N (N>=3) transistors are connected in parallel. The two first branches each include the transistor and a first transmission line which is connected to an output terminal of the transistor. The N−2 second branches each include the transistor and a second transmission line which is connected to the output terminal of the transistor. For each of the first branches, a sum between an electrical length of a parasitic component of the transistor and the electrical length of the first transmission line are odd multiples of approximately 90 degrees. For each of the second branches, the sum between the electrical length of the parasitic component of the transistor and the electrical length of the second transmission line are multiples of approximately 180 degrees.

Dependencies are inferred from the claim text.