Hi Sravan,
I understand from your query that you are interested in connecting an NPN bipolar transistor in MATLAB.
You can achieve this by using "NPN Bipolar Transistor" block in Simulink. You can run the following command in MATLAB command window to open the example that shows the generation of the Ic versus Vce curve for an NPN bipolar transistor:
openExample('simscapeelectrical/NPNCharacteristicsExample')
You may refer to the following documentation to learn more about the NPN Bipolar Transistor:
Hope this helps.
