{"title":"一种能检测输入尖峰速率变化的自适应CMOS抑制突触","authors":"Yilda Irizarry-Valle, A. C. Parker, N. Grzywacz","doi":"10.1109/LASCAS.2014.6820322","DOIUrl":null,"url":null,"abstract":"Sensory pathways in the brain attain large dynamic ranges and novelty detection through adaptive mechanisms. We present a CMOS neuromorphic circuit emulating the adaptation dynamics of short-term depressing synapses for both transient and steady state. The circuit detects abrupt changes in the input firing rate following the Weber-Fechner relation, where the transient response is proportional to the fractional change of the input firing rate. In the steady state, the input-output relationship follows the one over frequency law in the excitatory postsynaptic potential (EPSP) amplitude. The circuit also detects novel change after a long interval of inactivity. The design comprises a small number of transistors, while capturing the desired input-output relationship. The amplitude of both transient and steady state EPSP are tunable. To our knowledge this is the first CMOS design to approach the Weber-Fechner relation.","PeriodicalId":235336,"journal":{"name":"2014 IEEE 5th Latin American Symposium on Circuits and Systems","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"An adaptable CMOS depressing synapse with detection of changes in input spike rate\",\"authors\":\"Yilda Irizarry-Valle, A. C. Parker, N. Grzywacz\",\"doi\":\"10.1109/LASCAS.2014.6820322\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Sensory pathways in the brain attain large dynamic ranges and novelty detection through adaptive mechanisms. We present a CMOS neuromorphic circuit emulating the adaptation dynamics of short-term depressing synapses for both transient and steady state. The circuit detects abrupt changes in the input firing rate following the Weber-Fechner relation, where the transient response is proportional to the fractional change of the input firing rate. In the steady state, the input-output relationship follows the one over frequency law in the excitatory postsynaptic potential (EPSP) amplitude. The circuit also detects novel change after a long interval of inactivity. The design comprises a small number of transistors, while capturing the desired input-output relationship. The amplitude of both transient and steady state EPSP are tunable. To our knowledge this is the first CMOS design to approach the Weber-Fechner relation.\",\"PeriodicalId\":235336,\"journal\":{\"name\":\"2014 IEEE 5th Latin American Symposium on Circuits and Systems\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-05-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2014 IEEE 5th Latin American Symposium on Circuits and Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/LASCAS.2014.6820322\",\"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 IEEE 5th Latin American Symposium on Circuits and Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/LASCAS.2014.6820322","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An adaptable CMOS depressing synapse with detection of changes in input spike rate
Sensory pathways in the brain attain large dynamic ranges and novelty detection through adaptive mechanisms. We present a CMOS neuromorphic circuit emulating the adaptation dynamics of short-term depressing synapses for both transient and steady state. The circuit detects abrupt changes in the input firing rate following the Weber-Fechner relation, where the transient response is proportional to the fractional change of the input firing rate. In the steady state, the input-output relationship follows the one over frequency law in the excitatory postsynaptic potential (EPSP) amplitude. The circuit also detects novel change after a long interval of inactivity. The design comprises a small number of transistors, while capturing the desired input-output relationship. The amplitude of both transient and steady state EPSP are tunable. To our knowledge this is the first CMOS design to approach the Weber-Fechner relation.