"Jim Thompson" wrote in
message ...
On Wed, 14 Mar 2007 17:38:02 GMT, "Genome"
wrote:


"Eeyore" wrote in message
...
In response to various posts please find attached a mic amp which has
seen
volume production in commercial equipment.

Feel free to ask any questions / criticise whatever.

Graham


Here you go...... Listening to the criticism that others are giving you
I'd
do something like this. As to wether I've got it right is another matter.

I'd also claim that U1 and U2 also cascode the input stage improving
bandwidth.

DNA


Oooooey, patoooey! What's the gain ?:-)

...Jim Thompson

Sigh, bearing in mind that I am not Gods gift to my own arsehole, before I
waste my head figuring out the wrong answer....... was I close about the
reduction in re (hre?) by the compound connection of the transistors? Am I
even close about gm being 1/re.

You did have a larf at my analysis in the other place didn't you.

I could get worried about coming up with a 'complicated' equation like Fred.

I don't know (remember/didn't pay attention to) this stuff so I've got to do
it from my own concept of first principles and it'll still end up half
arsed.

DNA