{"title":"基于逆变器的TIAs中使用局部正反馈的无电感带宽扩展","authors":"Weihao Ni, Marc-Alexandre Chan, G. Cowan","doi":"10.1109/MWSCAS.2015.7282179","DOIUrl":null,"url":null,"abstract":"This paper investigates an inductorless technique for bandwidth extension which uses local positive feedback in an optical receiver front-end based on an inverter-based transimpedance amplifier and Cherry-Hooper post-amplifiers. Small feedback inverters create negative resistance that boosts the output resistance of inverter-based amplifiers. Compared to a reference design having a TIA and a three-stage post-amplifier, the addition of equal local positive feedback, while keeping the gain unchanged at 85.8 dB, increased the bandwidth from 12.4 GHz to 18.3 GHz and the vertical eye opening by 8% at 26 Gb/s. The noise performance degraded from 9.67 pA/√Hz to 10.66 pA/√Hz, while power consumption increases minimally. Unequal positive feedback on each post-amplifier, while keeping gain and bandwidth unchanged, further improved performance. Guidelines for sizing the feedback inverters are given.","PeriodicalId":216613,"journal":{"name":"2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":"{\"title\":\"Inductorless bandwidth extension using local positive feedback in inverter-based TIAs\",\"authors\":\"Weihao Ni, Marc-Alexandre Chan, G. Cowan\",\"doi\":\"10.1109/MWSCAS.2015.7282179\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper investigates an inductorless technique for bandwidth extension which uses local positive feedback in an optical receiver front-end based on an inverter-based transimpedance amplifier and Cherry-Hooper post-amplifiers. Small feedback inverters create negative resistance that boosts the output resistance of inverter-based amplifiers. Compared to a reference design having a TIA and a three-stage post-amplifier, the addition of equal local positive feedback, while keeping the gain unchanged at 85.8 dB, increased the bandwidth from 12.4 GHz to 18.3 GHz and the vertical eye opening by 8% at 26 Gb/s. The noise performance degraded from 9.67 pA/√Hz to 10.66 pA/√Hz, while power consumption increases minimally. Unequal positive feedback on each post-amplifier, while keeping gain and bandwidth unchanged, further improved performance. Guidelines for sizing the feedback inverters are given.\",\"PeriodicalId\":216613,\"journal\":{\"name\":\"2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)\",\"volume\":\"18 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"9\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSCAS.2015.7282179\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSCAS.2015.7282179","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Inductorless bandwidth extension using local positive feedback in inverter-based TIAs
This paper investigates an inductorless technique for bandwidth extension which uses local positive feedback in an optical receiver front-end based on an inverter-based transimpedance amplifier and Cherry-Hooper post-amplifiers. Small feedback inverters create negative resistance that boosts the output resistance of inverter-based amplifiers. Compared to a reference design having a TIA and a three-stage post-amplifier, the addition of equal local positive feedback, while keeping the gain unchanged at 85.8 dB, increased the bandwidth from 12.4 GHz to 18.3 GHz and the vertical eye opening by 8% at 26 Gb/s. The noise performance degraded from 9.67 pA/√Hz to 10.66 pA/√Hz, while power consumption increases minimally. Unequal positive feedback on each post-amplifier, while keeping gain and bandwidth unchanged, further improved performance. Guidelines for sizing the feedback inverters are given.
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