tony sayer wrote:

Eeyore scribeth thus
tony sayer wrote:
Eeyore scribeth thus

Did you check the spec of the LME49720 ?
http://www.national.com/pf/LM/LME49720.html

They had to devise a special method to measure the THD without the noise
dominating.
They're not even that shockingly expensive.

Shockingly enough in small quantities;!...

From the likes of Farnell maybe £4 seems a lot but compare that to a $400 wooden
volume control knob !
http://uk.farnell.com/1367613/semico...roduct.us0?sku
=national-semiconductor-lme49720ma-nopb&_requestid=131459

That's only £2 per divine op-amp !

What were those $150 ones for then?..

Evaluation boards I think ?


Wonder what Doc Martin would have to say;?...

You lost me

Him of Neve descent, didn't you work together once?..

DOC ? Martin ? I knew a Martin forget his surname who was in R&D.

Not Martin (M.H) (Hartley) Jones PhD you mean ? He'd left by the time I arrived. I
later did some work for him at Kelvin Hughes radar. Lovely chap. I still talk to him
very occasionally. In fact I was just on the point of asking if he'd be happy to be a
reference on my CV !
http://www.ibd-uk.com/members/jones-martin.htm

Graham