1.0UGPCBhttps://www.ugpcb.comrich600338<blockquote class="wp-embedded-content" data-secret="szTkNH1e3m"><a href="https://www.ugpcb.com/news/pcb-tech/electronic-design/operational-amplifier-principle/">What is the amplification principle of operational amplifier?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.ugpcb.com/news/pcb-tech/electronic-design/operational-amplifier-principle/embed/#?secret=szTkNH1e3m" width="600" height="338" title="“What is the amplification principle of operational amplifier?” — UGPCB" data-secret="szTkNH1e3m" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.ugpcb.com/wp-includes/js/wp-embed.min.js </script> https://www.ugpcb.com/wp-content/uploads/2024/10/d374ca00-869e-4ace-9ad6-7266188650cc-scaled.webp25602560The operational amplifier has two input terminals and one output terminal. The input terminal marked with "" is "in-phase input terminal" rather than positive terminal), and the other input terminal marked with "1" is "inverse input terminal", which can also not be called negative terminal. If the same signals are input from these two input terminals successively, Then the output signal with the same voltage but opposite polarity will be obtained at the output end: the signal output at the output end is in phase with the signal at the in-phase input end and in phase with the signal at the inverting input end.