Example Current Noise Calculation
{"Image DocumentName": "Example Current Noise Calculation", "Image ImageDescription": "Broadband Current Noise Component: BWn \u2248 (fH)(Kn) BWn \u2248 (158kHz)(1.57) =248kHz. inBB = (iBB)(\u221aBWn) inBB = (2.5fA/\u221aHz)(\u221a248kHz) = 1.244pA rms. Req = Rf || R1 = 100k || 1k = 0.99k. eni = (In)( Req) = (1.244pA)(0.99k) = 1.23nV rms. Since the Total Voltage noise is envt = 2496nV rms the current noise can be neglected. neglect. Here are the numbers. For this example the noise current is very small (fA/rt-Hz). The equivalent input resistance is also small (aprox = 1k). The result is an extremely small noise voltage is developed. For all practical purposes we could neglect this number, but we will included it for completeness. Later we will see an example where current noise dominates.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}