{"title":"A Design Method of Active High-Pass Butter-worth Filter","authors":"Sun Ruofei","doi":"10.1109/iwem53379.2021.9790408","DOIUrl":null,"url":null,"abstract":"This paper presented a design method of active Butterworth high-pass filter (HPF) with flat pass-band gain. This method, based on the transformation of domain surfaces, used correspondence in Butterworth filter’s denominator polynomials and the response function of Sallen-Key circuit to derive the formulas of Sallen Key HPF expressed by Butterworth filter’s quality factor Qi, it was verified by LTspice software simulation. The paper gave a 6th active high-pass filter whose corner frequency was 100Hz, gain of 4.5dB in pass-band and stop-band attenuation -30db @50Hz. The simulation result was agreed with requirements well, the method and formulas of Butterworth active HPF are reasonable.","PeriodicalId":141204,"journal":{"name":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/iwem53379.2021.9790408","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
This paper presented a design method of active Butterworth high-pass filter (HPF) with flat pass-band gain. This method, based on the transformation of domain surfaces, used correspondence in Butterworth filter’s denominator polynomials and the response function of Sallen-Key circuit to derive the formulas of Sallen Key HPF expressed by Butterworth filter’s quality factor Qi, it was verified by LTspice software simulation. The paper gave a 6th active high-pass filter whose corner frequency was 100Hz, gain of 4.5dB in pass-band and stop-band attenuation -30db @50Hz. The simulation result was agreed with requirements well, the method and formulas of Butterworth active HPF are reasonable.
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