Interference noise signal e.g. mobile telephone signal, suppressing circuit for e.g. digital video broadcast-handheld reception device, has selection filter transmitting telephone signal and phase shifter executing phase inversion on signal

摘要

The circuit (300) has a signal coupler (310) for separating a part of a reception signal, and a telephone signal selection filter (320) transmitting a telephone signal among signals from the signal coupler. A phase shifter executes a phase inversion on the telephone signal. A multiplexer (350) combines the signal from the phase shifter and the reception signal and suppresses the telephone signal comprised in the reception signal.