[SOLVED] What is Deep class AB?

H

hunas2127

Newbie level 6
Newbie level 6
Joined
Feb 20, 2025
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
100
1742985663487.png
While reading a paper on GaN power amplifiers, I often come across the term "deep class AB" instead of the usual class AB.
I'm curious about the difference between a typical class AB and deep class AB.
 

Solution
A
Sort by date Sort by votes
I have seen that term referencing a bias point closer to Class B biasing vs the standard "midpoint" type biasing between A and B, without going into Class B operation.
 
Upvote 0 Downvote
Probably just a slang term for using a conduction angle close to 180 degrees. Not very useful slang IMO.
 
Upvote 0 Downvote
Upvote 0 Downvote
Solution
Class B is high distortion and A is more linear but low efficiency so deep AB means more like Class A with a higher minimum current to improve linearity.
But the method employed seems to also match the impedance of harmonics to improve stability factor and PAE while reducing input levels with a deep AB front-end with 2 other stages to increase Pout > , PAE and lower distortion with > 10 dB gain. Bravo Iranian students.
 
Upvote 0 Downvote
You must log in or register to reply here.

Similar threads