{"title":"设计具有低噪声和高 PSRR 的 LDO 电路","authors":"Xiao Li, Shengming Huang, Yingying Yao","doi":"10.1117/12.3030321","DOIUrl":null,"url":null,"abstract":"Power supply rejection ratio (PSRR) and noise are important parameters of low voltage difference linear regulators (LDO), which are widely used in audio circuits. In order to achieve high PSRR and low noise, PSRR enhancement circuit and filter circuit are introduced in the LDO circuit designed in this paper. The LDO circuit designed in this paper is realized by MGN 0.35um process. The simulation analysis of the circuit by Cadence tool shows that the PSRR of the LDO circuit is -79dB at low frequency, which is better than -60dB at high frequency. The output noise is 0.395 uv/ √Hz at 1KHz, and the noise in the frequency range of 10Hz~100 KHz is as low as 32.5uVRMS.","PeriodicalId":198425,"journal":{"name":"Other Conferences","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Design of LDO circuit with low noise and high PSRR\",\"authors\":\"Xiao Li, Shengming Huang, Yingying Yao\",\"doi\":\"10.1117/12.3030321\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Power supply rejection ratio (PSRR) and noise are important parameters of low voltage difference linear regulators (LDO), which are widely used in audio circuits. In order to achieve high PSRR and low noise, PSRR enhancement circuit and filter circuit are introduced in the LDO circuit designed in this paper. The LDO circuit designed in this paper is realized by MGN 0.35um process. The simulation analysis of the circuit by Cadence tool shows that the PSRR of the LDO circuit is -79dB at low frequency, which is better than -60dB at high frequency. The output noise is 0.395 uv/ √Hz at 1KHz, and the noise in the frequency range of 10Hz~100 KHz is as low as 32.5uVRMS.\",\"PeriodicalId\":198425,\"journal\":{\"name\":\"Other Conferences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-06-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Other Conferences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1117/12.3030321\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Other Conferences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.3030321","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Design of LDO circuit with low noise and high PSRR
Power supply rejection ratio (PSRR) and noise are important parameters of low voltage difference linear regulators (LDO), which are widely used in audio circuits. In order to achieve high PSRR and low noise, PSRR enhancement circuit and filter circuit are introduced in the LDO circuit designed in this paper. The LDO circuit designed in this paper is realized by MGN 0.35um process. The simulation analysis of the circuit by Cadence tool shows that the PSRR of the LDO circuit is -79dB at low frequency, which is better than -60dB at high frequency. The output noise is 0.395 uv/ √Hz at 1KHz, and the noise in the frequency range of 10Hz~100 KHz is as low as 32.5uVRMS.
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