Krill - The little amp that might...

[Bigun]

Yes.

 

[Steve Dunlap]

Not without a redesign of the output stage.

 

[bear]

Hey!

Steve!

Did we ever determine if the output stage switches or not? 😀
Enjoyed the thread back in 2009...

signed,

still curious

 

[Bigun]

Bear you are a bad boy raising that old nugget !

I read the threads in a fair bit of detail. It does not switch at high frequencies, it can switch at low frequencies. It depends on the lifetime of minority carriers in the base region of the output devices. So those who say it does switch are correct, and those who say it doesn't switch are correct. Peace to all.

 

[Bigun]

Not without a redesign of the output stage.

You can use them as-is, just don't connect up the on-chip diodes.

 

[jarkaa]

Hi,

Search for posts of boraomega in one of the krill threads. He presented OPS design with thermal tracks. I´ve been using his desing for four years now.

Works like a charm!

Jarno

 

[Steve Dunlap]

I'm not really interested in reopening that argument.
It does switch at DC but I don't listen to a lot of DC.

 

[meanman1964]

Hi,

Search for posts of boraomega in one of the krill threads. He presented OPS design with thermal tracks. I´ve been using his desing for four years now.

Works like a charm!

Jarno

http://www.diyaudio.com/forums/solid-state/134619-krill-little-amp-might-157.html#post1800898

 

[UltimateX86]

Thanks

I work on a zero feedback buffer like the krill

I found THD 20k 0.004% 1W and 0.005% 100W

 

[bear]

Ahhh... yes, I read back a bit.

I see what is up... no problem.

Cap at the input = no DC. Of course. 😀

Anyhow, "if it sounds good, it is good" - Count Basie

Just wanted closure, got it now. No probs... enjoyed the discussion, happy to see there are satisfied users too. 😀

 

[Bigun]

Thanks

I work on a zero feedback buffer like the krill

I found THD 20k 0.004% 1W and 0.005% 100W

Your circuit has impressive results from your simulations.

However, the Krill has two key features - in my opinion - that your circuit is missing:
a) Steve's unique biasing
b) Restricted charge suck-out of minority charge carriers which I believe is responsible for the great treble this amplifier is reported to produce.