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直交位相発振器を必要としない全差動複素フィルタの周波数特性測定法 Measurement of Frequency Response for Fully Differential Polyphase Filters without Using Quadrature Oscillator 小野寺, 淳 川部, 謙二 Tanimoto, Hiroshi 谷本, 洋 Tanimoto 谷本 Hiroshi 洋 open access c2010IEEJapan 複素フィルタ 直交位相発振器 ベクトル・ネットワークアナライザ Polyphase Filter Quadrature Oscillator Vector Network Analyzer Amplitude error and phase error in the quadrature measuring signals introduce large measurement error for high frequency polyphase filters. A method without using quadrature signal has been proposed, which is based on the "Superposition Principle" for linear circuits; however, this method aims at single-ended measurements. So that differential measurement in high-frequency range, like RC-polyphase filters, is not well covered with the method. We have extended the method to accorrmodate with high frequency differential measurements by using vector network analyzer(VNA) and differential probes. The proposed method yields much better results compared with conventional methods with a quadrature oscillator. 一般社団法人 電気学会 2010-01-21 jpn conference paper https://kitami-it.repo.nii.ac.jp/records/8582 10026223124 AN10441815 電気学会研究会資料. ECT, 電子回路研究会 ECT-10 29 79 84 https://kitami-it.repo.nii.ac.jp/record/8582/files/ECT-10-29.pdf application/pdf 1.5 MB 2018-02-07