High-frequency circuit and communication device

A high-frequency circuit comprising:

• a differential amplifier circuit;
• and
• a mount substrate, wherein:
• the differential amplifier circuit comprises:
• a first amplifying circuit element comprising a first input terminal and a first output terminal,
• a second amplifying circuit element comprising a second input terminal and a second output terminal,
• first wiring connected to the first output terminal,
• second wiring connected to the second output terminal,
• a series circuit connected between the first wiring and the second wiring, the series circuit comprising a first inductor, a second inductor, and a capacitor
• a differential amplifier comprising the first amplifying circuit element and the second amplifying circuit element, and
• an output matching circuit connected to the first output terminal and the second output terminal,
• the differential amplifier, the output matching circuit, and the capacitor included in the series circuit are placed on the mount substrate, and
• in a view from a second direction orthogonal to both of a thickness direction of the mount substrate and a first direction that is an arrangement direction of the output matching circuit and the differential amplifier, the capacitor included in the series circuit is placed on the mount substrate and between a first outer edge, farther from the differential amplifier, of two outer edges of the output matching circuit along the second direction and second outer edge, farther from the output matching circuit, of two outer edges of the differential amplifier along the second direction.