{"id":156202,"date":"2023-08-29T14:48:59","date_gmt":"2023-08-29T09:18:59","guid":{"rendered":"https:\/\/www.gkseries.com\/blog\/?p=156202"},"modified":"2023-08-29T14:49:02","modified_gmt":"2023-08-29T09:19:02","slug":"voltage-amplifier-is-constructed-using-enhancement-mode-mosfets-labeled-m1-m2-m3-and-m4-in-the-figure-below-m1-m2-and-m4-are-n-channel-mosfets","status":"publish","type":"post","link":"https:\/\/www.gkseries.com\/blog\/voltage-amplifier-is-constructed-using-enhancement-mode-mosfets-labeled-m1-m2-m3-and-m4-in-the-figure-below-m1-m2-and-m4-are-n-channel-mosfets\/","title":{"rendered":"voltage amplifier is constructed using enhancement mode MOSFETs labeled M1, M2, M3 and M4 in the figure below. M1, M2 and M4 are n-channel MOSFETs"},"content":{"rendered":"\n<p>Q. A voltage amplifier is constructed using enhancement mode MOSFETs labeled M1, M2, M3 and M4 in the figure below. M1, M2 and M4 are n-channel MOSFETs and M3 is a p-channel MOSFET. All MOSFETs operate in saturation mode and channel length modulation can be ignored. The low frequency, small signal input and output voltages are \ud835\udc63<sub>\ud835\udc56\ud835\udc5b<\/sub> and \ud835\udc63<sub>\ud835\udc5c\ud835\udc62\ud835\udc61<\/sub>respectively and the dc power supply voltage is VDD . All n-channel MOSFETs have identical transconductance \ud835\udc54<sub>\ud835\udc5a\ud835\udc5b<\/sub> while the p-channel MOSFET has transconductance \ud835\udc54<sub>\ud835\udc5a\ud835\udc5d<\/sub>. The expressions for the low frequency small signal voltage gain \ud835\udc63<sub>\ud835\udc5c\ud835\udc62\ud835\udc61<\/sub>\/\ud835\udc63<sub>\ud835\udc56\ud835\udc5b<\/sub> is<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.gkseries.com\/blog\/wp-content\/uploads\/2023\/08\/image-42.png\" alt=\"\" class=\"wp-image-156203\" style=\"width:297px;height:208px\" width=\"297\" height=\"208\" srcset=\"https:\/\/www.gkseries.com\/blog\/wp-content\/uploads\/2023\/08\/image-42.png 519w, https:\/\/www.gkseries.com\/blog\/wp-content\/uploads\/2023\/08\/image-42-300x210.png 300w\" sizes=\"(max-width: 297px) 100vw, 297px\" \/><\/figure>\n\n\n\n<p>Ans: +gmn\/gmp<\/p>\n\n\n\n<p>Sol:<\/p>\n\n\n\n<p>M1, M2, M3, M4 are in saturation mode <\/p>\n\n\n\n<p>M1, M2, M4 \u2192 NMOS <\/p>\n\n\n\n<p>M3 \u2192 PMOS <\/p>\n\n\n\n<p>By using small signal analysis <\/p>\n\n\n\n<p>We can replace M1 and M3 by the internal impedance because drain and source terminal are short circuited<\/p>\n\n\n\n<p>Now replace MOSFET to small signal model<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.gkseries.com\/blog\/wp-content\/uploads\/2023\/08\/image-43.png\" alt=\"\" class=\"wp-image-156204\" style=\"width:171px;height:159px\" width=\"171\" height=\"159\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Q. A voltage amplifier is constructed using enhancement mode MOSFETs labeled M1, M2, M3 and M4 in the figure below. M1, M2 and M4 are n-channel MOSFETs and M3 is a p-channel MOSFET. All MOSFETs operate in saturation mode and channel length modulation can be ignored. The low frequency, small signal input and output voltages [&hellip;]<\/p>\n","protected":false},"author":419,"featured_media":156206,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[5141],"tags":[5140],"class_list":["post-156202","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gate","tag-gate-questions"],"_links":{"self":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/156202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/users\/419"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/comments?post=156202"}],"version-history":[{"count":1,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/156202\/revisions"}],"predecessor-version":[{"id":156207,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/posts\/156202\/revisions\/156207"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media\/156206"}],"wp:attachment":[{"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/media?parent=156202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/categories?post=156202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gkseries.com\/blog\/wp-json\/wp\/v2\/tags?post=156202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}