[sdiy] rectification/min/max question

[Derek Holzer]

Hi Ian and Dave,

yes it sounds easy. I know how to set up an op-amp as an amplifier 
(non-inverting), and maybe also for offset (inverting?), but I don't 
know how to set it up to do both at once. Can you show me a simple 
example of this? I'll also try the diode-drop option for comparison.

best,
d

Ian Fritz wrote:
> At 10:25 AM 11/19/2007, Derek Holzer wrote:
> 
>> I could if you could show me an example circuit ;-) I'm not sure how 
>> to set it up to handle offset and amplification at the same time.
> 
> It's easy to do that.  But then you still have to do your 
> rectification.  You could make a single opamp circuit that shifts and 
> amplifies, with a diode at the output to clip the negative signal.  
> That's a bit more involved than my previous suggestion, but would be 
> easier to adjust the offset level.
> 
>   Ian
> 

-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 108:
"Look closely at the most embarrassing details and amplify them"