With almost no cross over distortions and a linear response, the sound output from these amplifiers are distinct and most pleasing to hear.Ī simple circuit design of a class A amplifier presented here can be easily built and its above behavioral patterns may be studied, let’s see how we can do it. When it comes to designing an amplifier, class A topology may be considered as the most fundamental.īut all the above mentioned drawbacks of the amplifier are to some extent compensated by a few of its remarkable qualities which are as follows:Īs far as the sound output quality goes, class A amplifiers are considered to be one of the best. Thus its quiescent current drain is very high almost equal to the maximum power it is normally supposed to deliver. during both the negative and the positive half cycles.

This happens because the transistors here operate through the entire 360 degrees of the input periods i.e. Class A type of amplifiers may conduct at full swing, round the clock as long as the supply power is ON, irrespective of the applied input signal, making the output transistors sizzling hot, unnecessarily dissipating a lot of power in the form of heat. class A amplifier and also learn how to build a simple DIY class A amplifier.Īmplifiers are generally specified as highly efficient due to the fact that these amplifiers conduct only during the presence of an input signal and thus only the input signals are actually boosted.Ĭontrary to this, class A amplifiers are quite badly reputed as far as their efficiency is concerned. Here we will discuss regarding the technical specifications of the first type of amplifier i.e. These amplifiers are basically classified into class A, class B, class AB, class C and class D. The input is mostly in the form of an audio or a music signal. An audio amplifier is generally referred to as a device which is able to multiply an applied input signal amplitude to a level that may be much higher than the applied one.

Power amplifier diy