{"id":36792,"date":"2002-07-01T20:50:26","date_gmt":"2002-07-01T20:50:26","guid":{"rendered":"https:\/\/silvaco.com\/%e6%9c%aa%e5%88%86%e7%b1%bb\/measure-low-current-ft-in-bipolar-devices\/"},"modified":"2026-10-15T14:31:52","modified_gmt":"2026-10-15T21:31:52","slug":"measure-low-current-ft-in-bipolar-devices","status":"publish","type":"post","link":"https:\/\/silvaco.com\/zh-hans\/simulation-standard-zh-hans\/measure-low-current-ft-in-bipolar-devices\/","title":{"rendered":"Measure Low Current FT in Bipolar devices"},"content":{"rendered":"<h1>Measure Low Current FT in Bipolar devices<\/h1>\n<h3>Introduction<\/h3>\n<p>The input impedence of most network analyzers are around 1 MOhm, which is relatively small. Due to this low impedence the leakage current on the Base port (Typically Port1) becames high and makes it impossible to find the correct collector current bias when &#8220;Linear IC&#8221; or &#8220;Log IC&#8221; measurement modes are selected in FT_CE routine.<\/p>\n<p><img loading=\"lazy\" width=\"614\" height=\"800\" src=\"https:\/\/silvaco.com\/wp-content\/uploads\/simulationstandard\/simstd_jul_2002_hints-e1611194811472.jpg\" class=\"cleaned-enfold-image\" alt=\"\" decoding=\"async\" loading=\"lazy\" \/><\/p>\n<p><a href=\"https:\/\/silvaco.com\/dynamicweb\/jsp\/downloads\/DownloadDocStepsAction.do?req=download&#038;nm=simstd_jul_2002_hints.pdf\" class=\"BGT-btn\" target=\"_blank\" rel=\"noopener noreferrer\">Download Simulation Standard<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The input impedence of most network analyzers are around 1 MOhm, which is relatively small. Due to this low impedence the leakage current on the Base port (Typically Port1) becames high and makes it impossible to find the correct collector current bias when &#8220;Linear IC&#8221; or &#8220;Log IC&#8221; measurement modes are selected in FT_CE routine.<\/p>\n","protected":false},"author":12,"featured_media":21931,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[7723],"tags":[],"class_list":["post-36792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-simulation-standard-zh-hans","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Measure Low Current FT in Bipolar devices - Silvaco<\/title>\n<meta name=\"description\" content=\"Measure Low Current FT in Bipolar devices\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/silvaco.com\/zh-hans\/simulation-standard-zh-hans\/measure-low-current-ft-in-bipolar-devices\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Measure Low Current FT in Bipolar devices\" \/>\n<meta property=\"og:description\" content=\"Measure Low Current FT in Bipolar devices\" \/>\n<meta property=\"og:url\" content=\"https:\/\/silvaco.com\/zh-hans\/simulation-standard-zh-hans\/measure-low-current-ft-in-bipolar-devices\/\" \/>\n<meta property=\"og:site_name\" content=\"Silvaco\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SilvacoSoftware\/\" \/>\n<meta property=\"article:published_time\" content=\"2002-07-01T20:50:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-15T21:31:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/silvaco.com\/wp-content\/uploads\/simulationstandard\/simstd_jul_2002_hints-e1611194811472.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"614\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Casey Molver\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SilvacoSoftware\" \/>\n<meta name=\"twitter:site\" content=\"@SilvacoSoftware\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Casey Molver\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/\"},\"author\":{\"name\":\"Casey Molver\",\"@id\":\"https:\\\/\\\/silvaco.com\\\/ja\\\/#\\\/schema\\\/person\\\/2763eb741ca5ac04477fdff50ed84c80\"},\"headline\":\"Measure Low Current FT in Bipolar devices\",\"datePublished\":\"2002-07-01T20:50:26+00:00\",\"dateModified\":\"2026-10-15T21:31:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/\"},\"wordCount\":73,\"image\":{\"@id\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/silvaco.com\\\/wp-content\\\/uploads\\\/simulationstandard\\\/simstd_jul_2002_hints-e1611194811472.jpg\",\"articleSection\":[\"Simulation Standard\"],\"inLanguage\":\"zh-CN\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/\",\"url\":\"https:\\\/\\\/silvaco.com\\\/zh-hans\\\/simulation-standard-zh-hans\\\/measure-low-current-ft-in-bipolar-devices\\\/\",\"name\":\"Measure Low Current FT in Bipolar devices - 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