RCポリフェーズフィルタの区間内ばらつきによる信号誤差と残余イメージの解析

抄録

Signal error and residual image due to resistance and capacitance variation of an RC polyphase filter section are analyzed. It is clarified that input components other than quadrature ones of signal generate error on signal and image of signal appears on opposite sign of frequency when element values are not matched. Based on consideration of sensitivity formulation results, a scheme of placement of resistors and capacitors for suppressing image is proposed.