From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

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 401/CH9/EX9.8/Example9_8.sce | 40 ++++++++++++++++++++++++++++++++++++++++
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 create mode 100755 401/CH9/EX9.8/Example9_8.sce

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diff --git a/401/CH9/EX9.8/Example9_8.sce b/401/CH9/EX9.8/Example9_8.sce
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+//Example 9.8
+//Program to determine:
+//(a)Maximum bandwidth without equilization
+//(b)Mean square thermal noise current per unit bandwidth
+//(c)(Compare (a) and (b) for transimpedance amplifier
+
+clear;
+clc ;
+close ;
+
+//Given data
+Ra=4*10^6;                     //Ohms - INPUT RESISTANCE
+Rb=4*10^6;                     //Ohms - DETECTOR BIAS RESISTANCE
+Ct=6*10^(-12);                 //Farad - TOTAL CAPACITANCE
+k=1.381*10^(-23);              //m^2 kg/s - BOLTZMANN's CONSTANT
+T=300;                         //Kelvin - TEMPERATURE
+Rf=100*10^3;                   //Ohms - LOAD RESISTANCE
+G=400;                         //OPEN LOOP GAIN OF TRANSIMPEDANCE AMP.
+
+//Total effective load resistance
+Rtl=Rb*Ra/(Rb+Ra);
+
+//(a)Maximum bandwidth without equilization
+B=1/(2*%pi*Rtl*Ct)
+
+//(b)Mean square thermal noise current per unit bandwidth
+it_sq_bar=4*k*T/Rtl;
+
+//(c)(Compare (a) and (b) for transimpedance amplifier
+B1=G/(2*%pi*Rf*Ct)
+it_sq_bar1=4*k*T/Rf;
+
+//Displaying the Results in Command Window
+printf("For High Gain Transimpedance Amplifier:")
+printf("\n\n (a)Maximum bandwidth without equilization, B = %0.2f X 10^4 Hz.",B/10^4);
+printf("\n\n (b)Mean square thermal noise current per unit bandwidth, it_sq_bar = %0.2f X 10^(-27) A^2/Hz.",it_sq_bar/10^(-27));
+printf("\n\n (c)For High Gain Transimpedance Amplifier:")
+printf("\n\n    Maximum bandwidth without equilization, B = %0.2f X 10^8 Hz.",B1/10^8);
+printf("\n\n    Mean square thermal noise current per unit bandwidth, it_sq_bar = %0.2f X 10^(-25) A^2/Hz.",it_sq_bar1/10^(-25));
+printf("\n\n Mean square thermal noise current for transimpedance amplifier is %1.0f times or %1.0f dB greater.",it_sq_bar1/it_sq_bar,10*log10(it_sq_bar1/it_sq_bar));
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-- 
cgit