Class Ab Amplifier Schematic Diagram. Class ab amplifiers can be biased by choosing an operating point along this blue line excluding the class a and class b biasing points. By adding the diode transistors are biased in slightly conducting state even when no signal is present at base terminal thus removing the crossover distortion problem.
An alternate approach to overcome the cross over distortion is to use the ab amplifier. This modified amplifier is now given a different name it is called class ab amplifier. Class a the circuit will behave more such.
The modified circuit now is known as class ab.
The choice of its location depends on the desired levels of efficiency and linearity. The transistors must be mounted on heatsink to prevent the overheating maintain the transistors work in maximum performance. The modified circuit now is known as class ab. Class ab amplifiers can be biased by choosing an operating point along this blue line excluding the class a and class b biasing points.
