[AMPS] regulators

[Rich Measures]

>
>hi group,
>
>peter wrote,
>
>> You'll find the resistor values in very small type ( and I mean small! -
>> too small for comfort for a 50 year old like me) on the diagrams and the
>> footnotes, where they equal up the resistors for minimum drift, and
>> specify drifts with resistors <10k.
>
>as i recall from my years in the semiconductor device biz, 
>specifications like this are written for conditions where the device 
>is giving near "optimal" performance.  it doesn't mean other values 
>won't work, but it's sure a good place to start.  if your idea of  "optimal" 
>performance (e.g. rfi immunity) is different from the mfgrs' idea of 
>"optimal" performance (e.g. low drift) then the circuit 
>configurations can be different.  but everybody knows that already.

Apparently, not quite everybody, George.   After the RFI-mod being 
questioned, the drift, as well as the voltage change in the presence of 
RF was not observable on a 3 1/2 digit DMM--so it seems to me that more 
discussion is much adoo about nothin'.  . 
 - Rich -  

R. L. Measures, 805-386-3734, AG6K   


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