Class-H Amp

257

02:48:12

The capacitor is to remove the "Cannot find solution".

The driving mechanism (the transistor with the transformer and resistor) may be very unrealistic, but it's simply what I found easiest to design. Below 45V, the THD (excluding noise) is at most a few uV because the oscilloscope just gives a flat line. If you remove the entire class-A section leaving just the class-AB section, its THD (excluding noise) is a 5-10mV third harmonic distortion at 40V and 10mV fifth harmonic distortion at 45V. If you short the two diodes the class-AB section will turn into pure unbiased class-B, but the distortion is still much lower than if it wasn't class-H (tested and proven when examining the modified version of this circuit very closely and at high frequencies so that it is visible on the oscilloscope).

published 8 years ago

ManuelPeh

8 years ago

What is the current source in your circuit? How can it be realized?

selman

8 years ago

😏

jason9

8 years ago

Ask someone else. @thebugger says that some kind of bootstrapped emitter-follower will work, but don't ask me.

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