Common Emitter Amplifier - Class B

[bertus]

Hello,

The following page will tell you more about the amplifier classes and the related conducting angle:
https://www.electronics-tutorials.ws/amplifier/amplifier-classes.html

Bertus

 

[Ylli]

Hello,

The following page will tell you more about the amplifier classes and the related conducting angle:
https://www.electronics-tutorials.ws/amplifier/amplifier-classes.html

Bertus

Bertus, I am a bit surprised at your answer.
99% of this article is about audio applications. The only quick mention of RF is under the Class C heading. Once again, I am not disputing the fact that for audio applications, class B requires two devices. My posted circuit is not an audio amplifier, but an RF amplifier, and in that application a class B amplifier works just fine. And yes it is biased properly for class B.

 

[bertus]

Hello,

Have a look at this page for class B for RF and push pull audio:
https://learnabout-electronics.org/Amplifiers/amplifiers53.php

For RF circuits Class C is more common used:
https://www.circuitstoday.com/class-c-power-amplifier

Bertus

 

[Ylli]

I do believe this is what I have been saying all along. In the appropriate application, a singled ended class B stage works just fine. (it can be argued that the image posted here, with zero bias, is actually class C since conduction angle is <180°)

 

[bertus]

Hello,

Indeed the shown amplifier is not a real class B amplifier.
The class C has no bias:
https://www.elcircuit.com/2011/04/class-c-power-amplifier.html

Bertus

 

[BobK]

Apples and oranges. The amplifier classes are defined with sine wave inputs.

When you quoted the definition, you said nothing about sine waves.

What other secret rules do you have?

Bob