The class of an amplifier has nothing to do with the fidelity or quality of the amplifier. Rather, the class indicates the fundamental operational principle of the circuit. The definition of class A i...The class of an amplifier has nothing to do with the fidelity or quality of the amplifier. Rather, the class indicates the fundamental operational principle of the circuit. The definition of class A is that signal current in the collector flows 360^{\circ} out of the cycle. All of the amplifiers that were presented in the prior chapter are class A designs. In class B, i_C flows for just 180^{\circ}, and for class D, i_C is discontinuous; the transistor is used as a switch.
