Current Dumping, Another Design

[jxdking]

If you don't know what is current dumping, you really need to search on the forum and learn it. In short, it combines a small current Class-A output with the final output stage. You can get Class-A performance even with zero biased final output stage.

Here is the design for my future reference.
THD 0.001% at +-23Vpp into 4 Ohm.

 

[jan.didden]

In short, it combines a small current Class-A output with the final output stage

That's part of it, but that in itself is not what Quad called current dumping.
Where are the bridge components in your circuit? Is L1 part of the bridge?

Jan

 

[stef1777]

Hello,

Look at the Q17 project if you want to get ideas for a complete current dumping circuit. You can do the same with bipolars instead of MOSFETs. It wouldn't be bad to compare. 😉

Stef.

 

[jxdking]

That's part of it, but that in itself is not what Quad called current dumping.
Where are the bridge components in your circuit? Is L1 part of the bridge?

The bridge: L1, R3, R4, C1

 

[jxdking]

Hello,

Look at the Q17 project if you want to get ideas for a complete current dumping circuit. You can do the same with bipolars instead of MOSFETs. It wouldn't be bad to compare. 😉

Stef.

Thanks for sharing Q17. Last time I saw Q17 schematic was years ago. It may make sense to use mosfet in the input and vas stage for high voltage gain and simplicity.