When we get amplifier output current for 180 degrees of input. then it's called B class amplifier.
In a push pull class B amplifier one of the two power transistors or other amplifying elements handles the positive half of the waveform and the other element handles the negative half of the waveform.
In practice, push pull audio amplifiers are usually class AB; each power transistor handles slightly more than 180 degrees of input. This minimizes distortion (crossover distortion) when one of the two transistors ceases output and the other takes over.
Class B operated amplifier is used extensively for audio amplifiers that require high power outputs. Its also used as the driver and power amplifier stages of transmitters.
No, a push-pull amplifier can be built class A, class AB, class B, or class C depending on application.class A push-pull is used for low power audio usuallyclass AB push-pull is used for high power audio usuallyclass B and class C push-pull is used for very high power radio usually (B is typical for AM and C is typical for FM)
Class C amplifier.. A class D amplifier is more efficient than class B, and is more efficient than class C as well.
The Class B amplifier is a push pull amplifier with 78.5% efficiency. The high efficiency is due to the absence of power consumption during idle time which simultaneously increases the efficiency.
class b amplifiers as for class b amplifier the 'Q' point is near to cut of region.
class b amplifier is in between of a and c.so dont warry abt ds
the approximate efficiency of a class b linear RF AM amplifier is 35%
A class "A" amplifier amplifies the entire waveform, a class "B" amplifier only amplifies the first 1/2 of the wave form. See the images in the related link.
Because the output device in a class B amplifier are biased at cutoff, they only amplify one half of the input waveform, so a complementary stage, biased at class B, is needed to output the other half. There are several circuit layouts to do this.
based on i/p:a) small signal amplifier b) large signal amplifierbased on o/p:a) voltage amplifier b) power amplifier c) current ampbased on bandwidth:a)untuned amp(wideband) b)tuned amp(narrowband)based on biasing condition:a)class A amp b) class B amp ......e)class D amp f) class s ampbased on no. of stages:a)multistage amp b) single stage amp
The main advantage is lower power dissipation as the amplifier is not conducting half the time, however the resulting disadvantage is that it is nonlinear unless the more complex push-pull amplifier design is used (requiring about twice as many components).
When we get amplifier output current for 180 degrees of input. then it's called B class amplifier. In a push pull class B amplifier one of the two power transistors or other amplifying elements handles the positive half of the waveform and the other element handles the negative half of the waveform. In practice, push pull audio amplifiers are usually class AB; each power transistor handles slightly more than 180 degrees of input. This minimizes distortion (crossover distortion) when one of the two transistors ceases output and the other takes over.