[sdiy] Patchell's Boggling 13700 Expo Converter Thing???

[Magnus Danielson]

From: Cynthia Webster <cynthia.webster at gte.net>
Subject: [sdiy] Patchell's Boggling 13700 Expo Converter Thing???
Date: Sat, 21 Jun 2003 16:24:36 -0700

> Hi!

Hi Cynthia,

> Jim, while we're talking about 13700s...
> could you shed some more light on your mystical
> 13700 exponential converter circuit?
> 
> It's really boggling!  I look at it
> and just don't *get* it...
> 
> Please enlighten us on just what is actually
> going on in there?
> 
> Thanks a bunch, I feel that this is of
> *major* usefulness, but here I am trying to apply it
> to a discrete oscillator design and I keep
> scratching my head over it?
> 
> (please help?)

If you dig back you will find a thread where we dig into it. The main point is
to do an all-transistor compensation in order to do a "correct" tempco instead
of those tempco-resistor approximations. Ian has been at it too and they both
been quite succsessful I might add.

> LOL!
> 
> Hey, it's a Sunday!
> (hope no school busses are trying to mow you down today!)

Eh... no... and they usually don't either... at least not here.

> Best Wishes 
> 
> oh, did I mention...
> 
> < HELP! >

Um, I *think* we heard it.

> LOL!
> 
> Thanks 
> 
> Cynthia

You certainly seems to have woken up on the right side of the bed this morning
Cynthia ;O)

Cheers,
Magnus - been at the expo-formulas... too!