n in input resistance of a current-input amplifier\" you will create a Multisim

Question

n in input resistance of a current-input amplifier" you will create a Multisim simulation that allows you to explore the effect. You will run the stimulations and extract data from them that allow you to demonstrate the effect. The simulation circuit may employ Multisim models of actual semiconductor devices or idealized models (such as ideal voltage-controlled current sources and summing blocks). Whatever model is chosen, however, must be capable of demonstrating the open-loop behavior in question. For example, demonstration of bandwidth extension requires that you be able to determine the open-loop bandwidth; reduction of nonlinear distortion requires that you be able to demonstrate nonlinear distortion in the open-loop case ou must quantify the effect. For example, if your subject is disturbance rejection, you must be able to measure the extent to which disturbances are reduced by the use of negative feedback. If your subject s reduction of nonlinear distortion, you must quantify the distortion under open- and closed-loop conditions through THD (total harmonic distortion)

Explanation / Answer

Current input amplifiers are of various types. First you have to design any of the model. Then you will be able to make a relation between the output I0 with the input resistance R0 for a constant value of input current i.

After that you can simulate the relation in MATLAB. In the Matlab coding you have to vary the resistance R0 from its fixed value to 0 value. You did not mention the equation. So I am taking that you already have the equation. Then all you have to do is to write the coding for simulation. here it is,

clear all;
clc;:
R=[max_value:interval:min_value];% put the values to make the set of input resistances in the array for simulation

for(k=1:1:max_value+1)
I(k)=f(R(k)); %here you have to put the equation and replace R with R(k)

% here for each iteration output current value will be stored corresponding to the R value
end

plot(R,I);

xlable('Resistance');

ylabel('Current');

title('input resistance vs current ');

Now the plotted figure is stored named "main.fig" Then after that use these code to collect the values at different set points.

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