This amplifier produces an output voltage, Vo, that is proportional to the input voltage, Vs. The output voltage is measured using a voltmeter. The input voltage is the voltage of the voltage source. The constant of proportionality is called the gain of the amplifier. The value of the gain, g, of the amplifier depends on the gain, Av, of the dependent source and by the values of the resistances, Rin and Rout.
The gain, g, of the amplifier is given by
Notice that that amplifier gain is increased by choosing larger values of Rin and smaller values of Rout. After choosing values of Rin and Rout, a specified amplifier gain g is obtained by selecting the dependents source gain as