Adding TF plot. Started add op amp. General bug fix

Author: 28raining

filterAnalyzer/images/opAmp.js

@@ -0,0 +1,19 @@
+
+
+var shapeOpamp = draw2d.SVGFigure.extend({
+
+    init : function(attr)
+    {
+        this._super(extend({width:64, height:80},attr));
+        this.ressvgs = `
+        <svg xmlns="http://www.w3.org/2000/svg" viewBox="-1 -1 139 170">
+        <path stroke-linecap="round" stroke="#000" stroke-miterlimit="10" stroke-width="10" d="m34,16l80,80l-80,80z"/>
+        <path stroke-linecap="round" stroke="#000" stroke-miterlimit="10" stroke-width="5" d="M58,76v-24m-12,12h24m-24,64h24"/>
+        <path stroke-linecap="round" stroke="#000" stroke-miterlimit="10" stroke-width="10" d="M2,128h28m-28,-64h28m80,32h20"/>
+      </svg>
+        `;
+    },
+    getSVG: function(){
+      return this.ressvgs;
+    }
+});

filterAnalyzer/index.html

@@ -31,6 +31,7 @@
   <script src="images/shapeVin.js"></script>
   <script src="images/shapeVout.js"></script>
   <script src="images/shapeInductor.js"></script>
+  <script src="images/opAmp.js"></script>
   <link href="style.css" rel="stylesheet">
 
   <!-- <script type="module" src="./modules/ciruitToLaplace.mjs"></script> -->