{"id":12994,"date":"2018-06-28T08:06:41","date_gmt":"2018-06-28T15:06:41","guid":{"rendered":"https:\/\/rustybolt.info\/wordpress\/?p=12994"},"modified":"2018-06-28T08:07:02","modified_gmt":"2018-06-28T15:07:02","slug":"20%c2%b98-06-28-bootstrapped-for-high-z-input","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=12994","title":{"rendered":"2018-06-28 Bootstrapped For High Z Input"},"content":{"rendered":"<p>From FB group Building Transistor Radios<\/p>\n<p>For those who don&#8217;t want to or can&#8217;t use a JFET for high input impedance, you can use a regular transistor or two and bootstrapping to get a 10 Megohm high input impedance amplifier. This is from &#8220;Common Collector Amplifiers&#8221;, Electronics Now, Oct. 1993,<br \/>\nfound at americanradiohistory.com.<br \/>\nFor RFs, all capacitors can be 0.1 uF.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-12993 size-full\" src=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152.png\" width=\"1080\" height=\"1080\" data-temp-aztec-id=\"4868800b-c428-4b17-b9ee-86b916317e99\" srcset=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152.png 1080w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152-150x150.png 150w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152-300x300.png 300w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152-768x768.png 768w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152-1024x1024.png 1024w, https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/06\/Screenshot_2018-06-27-12-52-152-100x100.png 100w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>From FB group Building Transistor Radios For those who don&#8217;t want to or can&#8217;t use a JFET for high input impedance, you can use a regular transistor or two and bootstrapping to get a 10 Megohm high input impedance amplifier. This is from &#8220;Common Collector Amplifiers&#8221;, Electronics Now, Oct. 1993, found at americanradiohistory.com. For RFs,<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=12994\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[323,329,80],"tags":[],"class_list":["post-12994","post","type-post","status-publish","format-standard","hentry","category-electronic-design","category-functional-blocks","category-transistors"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12994","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12994"}],"version-history":[{"count":2,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12994\/revisions"}],"predecessor-version":[{"id":12996,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/12994\/revisions\/12996"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}