{"id":412,"date":"2018-04-06T10:47:59","date_gmt":"2018-04-06T10:47:59","guid":{"rendered":"https:\/\/www.tina.com\/resources\/?page_id=412"},"modified":"2018-07-04T16:44:10","modified_gmt":"2018-07-04T16:44:10","slug":"5-combined-inverting-and-non-inverting-inputs","status":"publish","type":"page","link":"https:\/\/www.tina.com\/resources\/home\/ideal-operational-amplifiers-2\/5-combined-inverting-and-non-inverting-inputs\/","title":{"rendered":"5. Combined Inverting and non-Inverting Inputs"},"content":{"rendered":"<div class=\"top-navigation\">\n<div class=\"current-page\"><img decoding=\"async\" src=\"https:\/\/www.tina.com\/images\/resource\/people-location-30.png\" \/>CURRENT &#8211; 5. Combined Inverting and non-Inverting Inputs<\/div>\n<div class=\"previous-page\"><a href=\"https:\/\/www.tina.com\/resources\/home\/4-input-resistance-of-op-amp-circuits\/\"><img decoding=\"async\" src=\"https:\/\/www.tina.com\/images\/resource\/leftarrow5.png\" \/>PREVIOUS- 4. Input resistance of op-amp circuits<\/a><\/div>\n<div class=\"next-page\"><a href=\"https:\/\/www.tina.com\/resources\/home\/6-design-of-op-amp-circuits\/\">NEXT- 6. Design of op-amp circuits<img decoding=\"async\" src=\"https:\/\/www.tina.com\/images\/resource\/rightarrow5.png\" \/><\/a><\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<p><script>\nfunction setStyle(){ \nheight = document.getElementsByClassName('entry-header')[0].clientHeight;\ndocument.getElementsByClassName('entry-header')[0].style.marginTop = height +\"px\";\ndocument.getElementsByClassName('top-navigation')[0].style.top = Math.round(-(height-20)*2) +\"px\";\n}\nsetStyle();\nwindow.onresize = function(event) {\nsetStyle();\n};\n<\/script><\/p>\n<p align=\"justify\"><strong><em><span style=\"font-size: 22px;\">Combined Inverting and Non-inverting Inputs<\/span><\/em><\/strong><\/p>\n<p align=\"justify\"><span style=\"font-family: Bodoni MT, serif;\"><span style=\"font-size: large;\">The general case of input configuration is a combination of the previous two cases. That is, we allow for both inverting and non-inverting inputs. The general configuration is shown in Figure (13).<\/span><\/span><\/p>\n<div id=\"attachment_217\" style=\"width: 456px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-217\" class=\"wp-image-217 size-full\" src=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-13.png\" alt=\"Ideal Operational Amplifier, Combined inverting and non-inverting inputs\" width=\"446\" height=\"205\" srcset=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-13.png 446w, https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-13-300x138.png 300w\" sizes=\"auto, (max-width: 446px) 100vw, 446px\" \/><p id=\"caption-attachment-217\" class=\"wp-caption-text\">Figure 13- Inverting and non-inverting inputs<\/p><\/div>\n<p align=\"justify\"><span style=\"font-family: Bodoni MT, serif;\"><span style=\"font-size: large;\">The previous circuits can be considered as special cases of this general problem. The output relationship is found by applying superposition as follows. Equation (29)<\/span><\/span><\/p>\n<div id=\"attachment_219\" style=\"width: 354px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-219\" class=\"wp-image-219 size-full\" src=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-29.png\" alt=\"\" width=\"344\" height=\"101\" srcset=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-29.png 344w, https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opamp2-29-300x88.png 300w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><p id=\"caption-attachment-219\" class=\"wp-caption-text\">(29)<\/p><\/div>\n<p align=\"justify\"><span style=\"font-family: Bodoni MT, serif;\"><span style=\"font-size: large;\">is derived by combining Equation (17)<\/span><\/span><\/p>\n<div id=\"attachment_147\" style=\"width: 258px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-147\" class=\"wp-image-147 size-full\" src=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opampcircuit2-17.png\" alt=\"\" width=\"248\" height=\"48\" \/><p id=\"caption-attachment-147\" class=\"wp-caption-text\">(17)<\/p><\/div>\n<p align=\"justify\"><span style=\"font-family: Bodoni MT, serif;\"><span style=\"font-size: large;\">with Equation (25)<\/span><\/span><\/p>\n<div id=\"attachment_192\" style=\"width: 211px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-192\" class=\"wp-image-192 size-full\" src=\"https:\/\/www.tina.com\/resources\/wp-content\/uploads\/2018\/03\/Opampcircuit2-25.png\" alt=\"\" width=\"201\" height=\"48\" \/><p id=\"caption-attachment-192\" class=\"wp-caption-text\">(25)<\/p><\/div>\n<p align=\"justify\"><span style=\"font-family: Bodoni MT, serif;\"><span style=\"font-size: large;\">Equation (29) represents a general result which will prove useful in analyzing a wide variety of circuits. With equations this complex, it is always a good idea to verify that the units on each side of the equality match. Indeed, the units on both sides of the equality are &#8220;volts&#8221;.<\/span><\/span><\/p>\n<div>\n<p><em><strong><u>APPLICATIONS<\/u><\/strong><\/em><\/p>\n<p>Analyze the following circuits using\u00a0 the TINACloud online circuit simulator software to determine\u00a0V<em><sub>out<\/sub><\/em>\u00a0in terms of the input voltages by clicking the links below.<\/p>\n<p><a href=\"https:\/\/www.tinacloud.com\/tinademo\/tina.php?c=5afd36f71be2f:405129&amp;amp;act;act=&amp;amp;noad&amp;amp;inframe=https%3A%2F%2Fwww.tina.com\" target=\"_blank\" rel=\"noopener\"><em><strong><span style=\"color: #466ce0;\"><em><strong>1 &#8211; Positive and negative gain Circuit Simulation <\/strong><\/em><\/span><\/strong><\/em><\/a><\/p>\n<p><a href=\"https:\/\/www.tinacloud.com\/tinademo\/tina.php?c=5afd3cd031c4b:380806&amp;amp;act;act=&amp;amp;noad&amp;amp;inframe=https%3A%2F%2Fwww.tina.com\" target=\"_blank\" rel=\"noopener\"><em><strong><span style=\"color: #466ce0;\"><em><strong>2 &#8211; Differencing amplifier configuration Circuit Simulation<\/strong><\/em><\/span><\/strong><\/em><\/a><\/p>\n<p><a href=\"https:\/\/www.tinacloud.com\/tinademo\/tina.php?c=5afd47ef55dd3:603390&amp;amp;act;act=&amp;amp;noad&amp;amp;inframe=https%3A%2F%2Fwww.tina.com\" target=\"_blank\" rel=\"noopener\"><em><strong><span style=\"color: #466ce0;\"><em><strong>3 &#8211; Weighted differencing amplifier Circuit Simulation<\/strong><\/em><\/span><\/strong><\/em><\/a><\/p>\n<p><a href=\"https:\/\/www.tinacloud.com\/tinademo\/tina.php?c=5afd4e831e465:910402&amp;amp;act;act=&amp;amp;noad&amp;amp;inframe=https%3A%2F%2Fwww.tina.com\" target=\"_blank\" rel=\"noopener\"><em><strong><span style=\"color: #466ce0;\"><em><strong>4 &#8211; Differencing amplifier with gain Circuit Simulation <\/strong><\/em><\/span><\/strong><\/em><\/a><\/p>\n<p><a href=\"https:\/\/www.tinacloud.com\/tinademo\/tina.php?c=5afd6c031bd22:331594&amp;amp;act;act=&amp;amp;noad&amp;amp;inframe=https%3A%2F%2Fwww.tina.com\" target=\"_blank\" rel=\"noopener\"><em><strong><span style=\"color: #466ce0;\"><em><strong>5 &#8211; Sign switcher Circuit Simulation <\/strong><\/em><\/span><\/strong><\/em><\/a><\/p>\n<p>&nbsp;<\/p>\n<div class=\"previous-page\"><a href=\"https:\/\/www.tina.com\/resources\/home\/4-input-resistance-of-op-amp-circuits\/#\"><img decoding=\"async\" src=\"https:\/\/www.tina.com\/images\/resource\/leftarrow5.png\" \/>PREVIOUS- 4. Input resistance of op-amp circuits<\/a><\/div>\n<div class=\"next-page\"><a href=\"https:\/\/www.tina.com\/resources\/home\/6-design-of-op-amp-circuits\/\/\">NEXT- 6. Design of op-amp circuits<img decoding=\"async\" src=\"https:\/\/www.tina.com\/images\/resource\/rightarrow5.png\" \/><\/a><\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>CURRENT &#8211; 5. Combined Inverting and non-Inverting Inputs PREVIOUS- 4. Input resistance of op-amp circuits NEXT- 6. Design of op-amp circuits Combined Inverting and Non-inverting Inputs The general case of input configuration is a combination of the previous two cases. That is, we allow for both inverting and non-inverting inputs. The general configuration is shown [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1357,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"yst_prominent_words":[253,308,282,278,293,289,291,294,295,276,266,168,265,263,290,281,292,275,269,264],"class_list":["post-412","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/pages\/412","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/comments?post=412"}],"version-history":[{"count":53,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/pages\/412\/revisions"}],"predecessor-version":[{"id":3920,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/pages\/412\/revisions\/3920"}],"up":[{"embeddable":true,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/pages\/1357"}],"wp:attachment":[{"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/media?parent=412"}],"wp:term":[{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/www.tina.com\/resources\/wp-json\/wp\/v2\/yst_prominent_words?post=412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}