{"title":"单级ota实现双积分器Gm-C双回路的频率补偿","authors":"I. Uzunov, Boncho Nikov, S. Ouzounov, M. Hristov","doi":"10.1109/ET.2017.8124399","DOIUrl":null,"url":null,"abstract":"The paper considers the design of a two-integrator loop Gm-C second order filter, realized by single stage operational transconductance amplifiers (OTA). Two major problems are discussed: equalizing the maxima of OTA input voltages and unfavorable effect of OTA input capacitances. It is shown OTA input capacitances cause increasing of pole Q-factor and may turn the circuit to unstable. A method for avoiding of this problem is proposed, which could be applied for the other circuits of this class.","PeriodicalId":127983,"journal":{"name":"2017 XXVI International Scientific Conference Electronics (ET)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Frequency compensation in a two-integrator loop Gm-C biquad when realized with single stage OTAs\",\"authors\":\"I. Uzunov, Boncho Nikov, S. Ouzounov, M. Hristov\",\"doi\":\"10.1109/ET.2017.8124399\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The paper considers the design of a two-integrator loop Gm-C second order filter, realized by single stage operational transconductance amplifiers (OTA). Two major problems are discussed: equalizing the maxima of OTA input voltages and unfavorable effect of OTA input capacitances. It is shown OTA input capacitances cause increasing of pole Q-factor and may turn the circuit to unstable. A method for avoiding of this problem is proposed, which could be applied for the other circuits of this class.\",\"PeriodicalId\":127983,\"journal\":{\"name\":\"2017 XXVI International Scientific Conference Electronics (ET)\",\"volume\":\"40 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2017 XXVI International Scientific Conference Electronics (ET)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ET.2017.8124399\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 XXVI International Scientific Conference Electronics (ET)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ET.2017.8124399","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Frequency compensation in a two-integrator loop Gm-C biquad when realized with single stage OTAs
The paper considers the design of a two-integrator loop Gm-C second order filter, realized by single stage operational transconductance amplifiers (OTA). Two major problems are discussed: equalizing the maxima of OTA input voltages and unfavorable effect of OTA input capacitances. It is shown OTA input capacitances cause increasing of pole Q-factor and may turn the circuit to unstable. A method for avoiding of this problem is proposed, which could be applied for the other circuits of this class.
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