2026-03-13T11:05:58Z https://kitami-it.repo.nii.ac.jp/oai

oai:kitami-it.repo.nii.ac.jp:00008567 2026-03-03T05:58:46Z 10

ギルバートミキサ回路におけるスイッチから発生する雑音の解析 AnalysIs Of Noise from Switching Pair in Gilbert Mixer 伊藤, 龍太 Tanimoto, Hiroshi 谷本, 洋 Tanimoto 谷本 Hiroshi 洋 open access c2005IEEJapan ギルバートミキサ 雑音解析 周期定常雑音 矩形波 局部発振器 A noise analysis of Gilbert mixer using Bipolar Junction Transistors (BJT) for usewith direct conversion receiver mixers is presented. Noises are treated as amplitude modulated white noises, which are characterized as cyclostationary noises, and all the folding effects are taken into account. This analysts considers thermal noise from base resistance and shot noise from collector current. First, output noise power spectrum densities are calculated for static local oscillator (LO) drive for collector shot noises and base resistance thermal noises. Next, we calculate the output power spectrum densities for sinusoidaJ and rectangular wave LO drive. We found that rectangular wave case produces much less noise for LO drive amplitude of larger than 0.1[V]. Finally, effects of parastic capacitances on the output noise are analyzed, and we found that the effects are almost negligible up to a few GHz for 10[GHz] fr device with typical operation conditions. These results theoretically support the insights which have been known to experienced circuit designers. 一般社団法人 電気学会 2005 jpn conference paper https://kitami-it.repo.nii.ac.jp/records/8567 電気学会研究会資料. ECT, 電子回路研究会 ECT-05 4 17 22 https://kitami-it.repo.nii.ac.jp/record/8567/files/ECT-05-4.pdf application/pdf 1.3 MB 2018-02-01