Voltage amp mixed with current amp?

kubeek · 27th June 2006, 07:00 PM

Today I got this brand new idea (or I hope it is).
Normal power amps creates output voltage according to input voltage.

Would it be possible to "bridge" usual voltage-amp with a current-producing amp (similar to current source - feedback after some resistor and before load) to create an amplifier that produces output power based on input voltage?

Could this improve the output signal quality, because it wouldn´t change output power with the load impedance changing?

MikeB · 27th June 2006, 07:28 PM

Hmmm, the result would be a pure current producing amp, as it will dominate the voltage amp. The current producing amp will produce the voltage necessary to have the current it wants, completely overriding what the voltage amp does.
It might sound interesting, but colorized by the impedance curve of the speaker.

Mike

kubeek · 27th June 2006, 07:32 PM

Yeah, that seems quite right.
Again, I missed those little details..

MikeB · 27th June 2006, 07:36 PM

No problem, it's good to see that there are still some people searching for new concepts !

Mike

27th June 2006, 07:00 PM	#1
kubeek diyAudio Member Join Date: Dec 2005 Location: Prague, Czech Rep	Voltage amp mixed with current amp? Today I got this brand new idea (or I hope it is). Normal power amps creates output voltage according to input voltage. Would it be possible to "bridge" usual voltage-amp with a current-producing amp (similar to current source - feedback after some resistor and before load) to create an amplifier that produces output power based on input voltage? Could this improve the output signal quality, because it wouldn´t change output power with the load impedance changing?

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27th June 2006, 07:28 PM	#2
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	Hmmm, the result would be a pure current producing amp, as it will dominate the voltage amp. The current producing amp will produce the voltage necessary to have the current it wants, completely overriding what the voltage amp does. It might sound interesting, but colorized by the impedance curve of the speaker. Mike

27th June 2006, 07:32 PM	#3
kubeek diyAudio Member Join Date: Dec 2005 Location: Prague, Czech Rep	Yeah, that seems quite right. Again, I missed those little details..

27th June 2006, 07:36 PM	#4
MikeB diyAudio Member Join Date: Apr 2004 Location: Gütersloh	No problem, it's good to see that there are still some people searching for new concepts ! Mike

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