According to the inputs of two signals, a mixer 3 performs frequency conversion and a BPF 4 attenuates their spurious output, phase units 14 and 16 and attenuators 15 and 17 which invert the phases of the two input signals and attenuate them are provided as a spurious suppressing circuit A, and the resulting phase-inverted and attenuated signals are given to the output signal of the BPF 4 so as to cancel the spurious outputs.例文帳に追加

二つの信号の入力に基づきミキサー３により周波数変換し、ＢＰＦ４でそのスプリアスを減衰させる構成で、スプリアス抑制回路Ａとして、二つの入力信号を逆位相変換しかつ減衰する位相器１４，１６及び減衰器１５，１７を設け、これにより得られた逆位相減衰信号を上記ＢＰＦ４の出力信号に与えてスプリアスを打ち消すようにする。 - 特許庁