K. Sivakumari, Avireni Srinivasulu, V. Venkata Reddy
{"title":"一种高摆率、低电压的CMOS ab类放大器","authors":"K. Sivakumari, Avireni Srinivasulu, V. Venkata Reddy","doi":"10.1109/AE.2014.7011717","DOIUrl":null,"url":null,"abstract":"A simple low voltage operational amplifier is introduced with an efficient class-AB output stage. Two biasing transistors are present in between common source stage. This amplifier is simulated in 0.18 μm CMOS technology. The proposed class-AB amplifier is designed to operate from ±500 mV supplies. The simulated phase margin of proposed class-AB amplifier is 87° at the load of 10 kΩ∥1 pF. The class-AB amplifier's total compensation capacitance is 5 pF, which is less than 50% of conventional amplifiers. The unity gain frequency of proposed class-AB amplifier is 21.17 MHz, when driving a resistive load from 10 kΩ to 500 kΩ and capacitive loads from 1 pF to 5 pF. The slew rates of modified amplifier are 7.5 V/μs and 8.57 V/μs. This modified amplifier greatly increases the slew rate compared to the conventional circuits.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"A high slew rate, low voltage CMOS class-AB amplifier\",\"authors\":\"K. Sivakumari, Avireni Srinivasulu, V. Venkata Reddy\",\"doi\":\"10.1109/AE.2014.7011717\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A simple low voltage operational amplifier is introduced with an efficient class-AB output stage. Two biasing transistors are present in between common source stage. This amplifier is simulated in 0.18 μm CMOS technology. The proposed class-AB amplifier is designed to operate from ±500 mV supplies. The simulated phase margin of proposed class-AB amplifier is 87° at the load of 10 kΩ∥1 pF. The class-AB amplifier's total compensation capacitance is 5 pF, which is less than 50% of conventional amplifiers. The unity gain frequency of proposed class-AB amplifier is 21.17 MHz, when driving a resistive load from 10 kΩ to 500 kΩ and capacitive loads from 1 pF to 5 pF. The slew rates of modified amplifier are 7.5 V/μs and 8.57 V/μs. This modified amplifier greatly increases the slew rate compared to the conventional circuits.\",\"PeriodicalId\":149779,\"journal\":{\"name\":\"2014 International Conference on Applied Electronics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2014 International Conference on Applied Electronics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/AE.2014.7011717\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 International Conference on Applied Electronics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/AE.2014.7011717","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A high slew rate, low voltage CMOS class-AB amplifier
A simple low voltage operational amplifier is introduced with an efficient class-AB output stage. Two biasing transistors are present in between common source stage. This amplifier is simulated in 0.18 μm CMOS technology. The proposed class-AB amplifier is designed to operate from ±500 mV supplies. The simulated phase margin of proposed class-AB amplifier is 87° at the load of 10 kΩ∥1 pF. The class-AB amplifier's total compensation capacitance is 5 pF, which is less than 50% of conventional amplifiers. The unity gain frequency of proposed class-AB amplifier is 21.17 MHz, when driving a resistive load from 10 kΩ to 500 kΩ and capacitive loads from 1 pF to 5 pF. The slew rates of modified amplifier are 7.5 V/μs and 8.57 V/μs. This modified amplifier greatly increases the slew rate compared to the conventional circuits.
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