[sdiy] Saw core JFET mystery

Neil Johnson neil.johnson97 at ntlworld.com
Tue Mar 2 21:07:48 CET 2010


David,

On 2 Mar 2010, at 03:35, David G. Dixon wrote:
> Also,
> the comparator output never gets higher than about -4V during the  
> reset
> even, and of course rides at -15V at all other times.

So, during reset, 1.8mA is going *somewhere*.  If the comparator  
output is truly off then it must be going through the FET, or there's  
something else afoot.

Silly question, but are you sure about the pinout of the FET?

Neil
--
http://www.njohnson.co.uk






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