{"title":"A Low Noise TIA with Continuous Time-Gain Compensation for Ultrasound Transducers","authors":"Xinwei Yu, Fan Ye, Junyan Ren","doi":"10.1109/APCCAS55924.2022.10090351","DOIUrl":null,"url":null,"abstract":"This paper presents a low noise power-efficient TIA for capacitive-micromachined-ultrasonic transducers (CMUT) to ensure the high-quality ocular ultrasound images. Implemented in CMOS technology, the TIA adopts a source input structure to achieve broadband impedance matching. The use of noise cancellation and capacitive feedback optimizes the noise performance of the amplifier. A continuous time-gain compensation circuit is built in the TIA by adjusting the positive and negative resistance loads, which are composed of the voltage -controlled MOS array. Simulation results show that the TIA achieves a $\\boldsymbol{1.9}\\mathbf{pA}/\\sqrt{}$ Hz input referred noise at 18MHz center frequency of the echoes while consuming only 0.18mW.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APCCAS55924.2022.10090351","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
This paper presents a low noise power-efficient TIA for capacitive-micromachined-ultrasonic transducers (CMUT) to ensure the high-quality ocular ultrasound images. Implemented in CMOS technology, the TIA adopts a source input structure to achieve broadband impedance matching. The use of noise cancellation and capacitive feedback optimizes the noise performance of the amplifier. A continuous time-gain compensation circuit is built in the TIA by adjusting the positive and negative resistance loads, which are composed of the voltage -controlled MOS array. Simulation results show that the TIA achieves a $\boldsymbol{1.9}\mathbf{pA}/\sqrt{}$ Hz input referred noise at 18MHz center frequency of the echoes while consuming only 0.18mW.
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