Remakes of thebuggers Simple class-H amp example

164

01:36:46

These amps behave exactly the same as @thebugger's "Simple class H amp example" circuit, in most if not all ways, including efficiency!

Edit: I added a second one (orange) that's more like his amp. The 113ohm resistor is his "constant current source", because he had a constant voltage across it, effectively making it a resistor. The 10mA constant current source here is equivalent to the part of his circuit that was an OP-amp driving a transistor to keep the voltage across his "constant current source" always the same.

Edit2: I added two more amps and reassigned the colors so that they would go in order of how close they are to the @thebugger's amp, with the top on the oscilloscope/rightmost circuit (blue) being closest to his amp, and the bottom on the oscilloscope/leftmost circuit (red) being the most simplified version.

published 8 years ago

hurz

8 years ago

Right!!!!!! He put a discret current source with transistors on top and changed its job to be a simple resistor by his modulated powersupply voltage tracking to keep the voltage also constant! Constant voltage across a resistor gives a perfect current source again. So better put directly a discret current source with enough headroom constant supply or do this feedback modulation against a simple resistor. But what buggzy demostrante was pointless.

hurz

8 years ago

I liked your first circuit much more. Now it looks to messy 😉 Anyway, have you seen one of my latest circuits "Redundant sources"?

jason9

8 years ago

I know, it looks messy, but the original circuit is still there. Also, I did see your circuit about redundant sources, but the voltage sources are in series with the current sources as if their there to power the current sources. Because a current source shouldn't be able to supply current to a higher voltage wire than the one behind the current source, unless it has its own power supply, but @thebugger's circuit did not feature a power supply in his current source, but instead, outside of his current source.

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