VARIABLE FILTER CIRCUIT, HIGH-FREQUENCY MODULE CIRCUIT, AND COMMUNICATION DEVICE

摘要

Provided is a variable filter circuit with which it is possible to control the passband bandwidth and the center frequency and to minimize the total number of variable reactance parts. A variable filter circuit (10) provided with a serial arm (11) in which a plurality of circuit elements are serially connected relative to a signal path, and a parallel arm (12) in which a plurality of circuit elements are connected in parallel relative to the signal path, the serial arm (11) and the parallel arm (12) each including a variable reactance element, a resonating serial reactance element serially connected to the variable reactance element, and a resonating parallel reactance element connected in parallel to the variable reactance element.