New Buffer Design - A Few Prototypers Wanted. :)
Nov 26, 2008 at 2:44 AM Thread Starter Post #1 of 2

runeight

Member of the Trade: Cavalli Audio
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As part of desiging several new amps, I have come up with a new buffer concept that is a slight twist on an old idea. For now I'm calling it the Cavalli Buffer because I can't think of a creative name for it. It could also be that the design has already been tried and I just haven't seen it posted anywhere.

This buffer is designed to work with amps like the SOHA where a very high input impedance is required. Theoretically it has a much higher Zi than the jisbos buffer and maintains a much higher Zi beyond the audio band.

As an aside the buffer is not designed to work in amps where a discrete buffer is in an opamp feedback loop where the opamp is used to zero the DC offset (such as the PPA amp).

The buffer uses 8 BJTs, 8 resistors, two small capacitors (for frequency compensation), and one trimpot.

If there are two or three diyers who might like to test build some prototypes, please PM me and I'll provide the schematic.

If the buffer works, then we'll post schematics and results. If not, it will go quietly into buffer heaven.
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Nov 27, 2008 at 4:17 AM Post #2 of 2

dBel84

Cavalli Tinkerer at large
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How many more things are lurking in that overcoat.
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Good buffers are always useful and I may have a use for another one sometime soon. If there are no takers on this, I will be up for having a go but I will need a little time to get it done ..dB
 

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