{"title":"基于改进望远镜- cascode OTA的低功耗低噪声神经记录放大器","authors":"Mohammad-Amin Mohtasham-Nia, M. Yavari","doi":"10.1109/IICM55040.2021.9730196","DOIUrl":null,"url":null,"abstract":"In this paper, a fully-differential low-power low-noise neural recording amplifier with a novel recycling telescopic-cascode (RTC) operational transconductance amplifier (OTA) is presented. In the proposed RTC-OTA, the current recycling and positive feedback cross-coupled transistors are utilized to significantly improve the OTA's parameters such as DC gain and unity gain bandwidth. The gain enhancement also improves the linearity in the closed-loop structure. Extensive analytical calculations and simulation results using the $\\boldsymbol{0.18-\\mu \\mathrm{m}}$ TSMC CMOS process are provided to evaluate the usefulness of the proposed OTA. The simulated neural recording amplifier achieves 4.46 $\\boldsymbol{\\mu \\mathrm{V}_{\\text{rms}}}$ input-referred noise over 1 Hz-10 kHz bandwidth, 1.82 noise efficiency factor, -46 dB total harmonic distortion (THD) for an 18 $\\boldsymbol{\\text{mV}_{\\text{pp}}}$, 1kHz sinusoidal input. The power consumption is 2.25 $\\boldsymbol{\\mu \\mathrm{W}}$ from a 1.8-V voltage supply.","PeriodicalId":299499,"journal":{"name":"2021 Iranian International Conference on Microelectronics (IICM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Low-Power Low-Noise Neural Recording Amplifier With Improved Telescopic-Cascode OTA\",\"authors\":\"Mohammad-Amin Mohtasham-Nia, M. Yavari\",\"doi\":\"10.1109/IICM55040.2021.9730196\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, a fully-differential low-power low-noise neural recording amplifier with a novel recycling telescopic-cascode (RTC) operational transconductance amplifier (OTA) is presented. In the proposed RTC-OTA, the current recycling and positive feedback cross-coupled transistors are utilized to significantly improve the OTA's parameters such as DC gain and unity gain bandwidth. The gain enhancement also improves the linearity in the closed-loop structure. Extensive analytical calculations and simulation results using the $\\\\boldsymbol{0.18-\\\\mu \\\\mathrm{m}}$ TSMC CMOS process are provided to evaluate the usefulness of the proposed OTA. The simulated neural recording amplifier achieves 4.46 $\\\\boldsymbol{\\\\mu \\\\mathrm{V}_{\\\\text{rms}}}$ input-referred noise over 1 Hz-10 kHz bandwidth, 1.82 noise efficiency factor, -46 dB total harmonic distortion (THD) for an 18 $\\\\boldsymbol{\\\\text{mV}_{\\\\text{pp}}}$, 1kHz sinusoidal input. The power consumption is 2.25 $\\\\boldsymbol{\\\\mu \\\\mathrm{W}}$ from a 1.8-V voltage supply.\",\"PeriodicalId\":299499,\"journal\":{\"name\":\"2021 Iranian International Conference on Microelectronics (IICM)\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-12-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2021 Iranian International Conference on Microelectronics (IICM)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IICM55040.2021.9730196\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 Iranian International Conference on Microelectronics (IICM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IICM55040.2021.9730196","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A Low-Power Low-Noise Neural Recording Amplifier With Improved Telescopic-Cascode OTA
In this paper, a fully-differential low-power low-noise neural recording amplifier with a novel recycling telescopic-cascode (RTC) operational transconductance amplifier (OTA) is presented. In the proposed RTC-OTA, the current recycling and positive feedback cross-coupled transistors are utilized to significantly improve the OTA's parameters such as DC gain and unity gain bandwidth. The gain enhancement also improves the linearity in the closed-loop structure. Extensive analytical calculations and simulation results using the $\boldsymbol{0.18-\mu \mathrm{m}}$ TSMC CMOS process are provided to evaluate the usefulness of the proposed OTA. The simulated neural recording amplifier achieves 4.46 $\boldsymbol{\mu \mathrm{V}_{\text{rms}}}$ input-referred noise over 1 Hz-10 kHz bandwidth, 1.82 noise efficiency factor, -46 dB total harmonic distortion (THD) for an 18 $\boldsymbol{\text{mV}_{\text{pp}}}$, 1kHz sinusoidal input. The power consumption is 2.25 $\boldsymbol{\mu \mathrm{W}}$ from a 1.8-V voltage supply.
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