{"title":"具有品质因子可调性的开关电容双滤波器的设计","authors":"Khalid A. Al-Badawy, E. Soliman, S. Mahmoud","doi":"10.1109/ICM.2009.5418621","DOIUrl":null,"url":null,"abstract":"A high selectivity switched capacitor bandpass filter is introduced in this paper which is derived from Fleischer and Laker switched capacitor biquad [1]. High quality factors are obtained by means of a proposed Q-factor tuning technique that is applied by changing the effective sampling frequency of the clock signals of a positive feedback switched capacitor branch. The center frequency is 17.4 KHz and Q-factor ranges from 0.53–27.04. Spice simulations are provided for the filters. Active blocks are used to realize switched capacitor filters where an Operational Amplifier is used for simulation, The op-amp used in the design stage is a two-stage compensated op-amp where a 0.25µm transistor model is used with a supply voltage Vdd and Vss of ±2.5V respectively","PeriodicalId":391668,"journal":{"name":"2009 International Conference on Microelectronics - ICM","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Design of switched capacitor biquad filter with quality factor tunability\",\"authors\":\"Khalid A. Al-Badawy, E. Soliman, S. Mahmoud\",\"doi\":\"10.1109/ICM.2009.5418621\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A high selectivity switched capacitor bandpass filter is introduced in this paper which is derived from Fleischer and Laker switched capacitor biquad [1]. High quality factors are obtained by means of a proposed Q-factor tuning technique that is applied by changing the effective sampling frequency of the clock signals of a positive feedback switched capacitor branch. The center frequency is 17.4 KHz and Q-factor ranges from 0.53–27.04. Spice simulations are provided for the filters. Active blocks are used to realize switched capacitor filters where an Operational Amplifier is used for simulation, The op-amp used in the design stage is a two-stage compensated op-amp where a 0.25µm transistor model is used with a supply voltage Vdd and Vss of ±2.5V respectively\",\"PeriodicalId\":391668,\"journal\":{\"name\":\"2009 International Conference on Microelectronics - ICM\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 International Conference on Microelectronics - ICM\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICM.2009.5418621\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 International Conference on Microelectronics - ICM","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICM.2009.5418621","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design of switched capacitor biquad filter with quality factor tunability
A high selectivity switched capacitor bandpass filter is introduced in this paper which is derived from Fleischer and Laker switched capacitor biquad [1]. High quality factors are obtained by means of a proposed Q-factor tuning technique that is applied by changing the effective sampling frequency of the clock signals of a positive feedback switched capacitor branch. The center frequency is 17.4 KHz and Q-factor ranges from 0.53–27.04. Spice simulations are provided for the filters. Active blocks are used to realize switched capacitor filters where an Operational Amplifier is used for simulation, The op-amp used in the design stage is a two-stage compensated op-amp where a 0.25µm transistor model is used with a supply voltage Vdd and Vss of ±2.5V respectively
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