what is this distortion?
This is the circuit where it is derived
As you can see, it looks like there is a problem in the negative half cycle, its not really a straight clip. The waveform is taken at the 8 ohm resistor
Electronic – what is this distortion
amplifierdistortion
Related Solutions
It isn't fundamentally different. Both IM signals also produce their own harmonic distortions, as well as the IM distortion. When there is only one signal, there is nothing to intermodulate with, so no IM. In a feedback circuit of course the harmonics themselves will produce IM distortion.
Cross over distortion of a class B amplifier: -
The top half of the waveform comes from TR1 conducting and the bottom half from TR2 conducting. At some point a class B amplifier changes from using the top transistor to the bottom transistor. When this happens there is insufficient voltage across base/emitter to activate either transistor hence there is a dead zone: -
The diodes turn a class B design into a class AB. Now, neither transistor is fully off therefore the dead zone is no more.
The capacitors are incidental - they allow the input signal to couple to both bases without the new biasing arrangement being affected.
Related Topic
- Electronic – Strange Distortion from Second Order Active Low Pass Filter
- Electrical – Actual reason why I have distortion in lower part of this square wave amplifier (level translator application)
- Electronic – op-amp oscillators weird output
- Electronic – Crossover distortion returns when load is applied
- Electronic – How to get rid of this distortion
Best Answer
A couple of observations:
(1) In your schematic, you show Q4 as an n-channel though the part number is for a p-channel.
(2) Also, in your schematic, Q4 appears to be "upside down", i.e., the drain is connected to the output rather than the source.