[sdiy] Which opamp pins wiring is best for CV out ?? A or B ??

[Jean-Pierre Desrochers]

What about using "B" but with a 10k resistor in series in the path
going back to inverting pin to protect from any incoming voltage spikes from 
the output connector..? 
Very low output impedance but protected inverting input..
Best of both world ?
JP

 On Mon 08/11/10 14:39 , Harry Bissell harrybissell at wowway.com sent:
> I think this was discussed in a recent thread but I forget what the title
> might have been...
> I like "a" because it puts the resistor between the opamp
> inverting inputand the real world, but it will have an error based on the value of the
> outputresistor and the input impedance of whatever you are driving...
> 
> Others did not agree...
> 
> H^) harry
> 
> 
> ----- Original Message -----
> From: Jean-Pierre Desrochers  ricom.ca>To: s
> ynth-diy at dropmix.xs4all.nlSent: Mon, 08 Nov 2010 14:32:32 -0500 (EST)
> Subject: [sdiy] Which opamp pins wiring is best for CV out ?? A or B ??
> 
> 
> 
> Which opamp pins wiring is best for CV out ?? A or B ??
> Sorry for the bad drawing... no HTML so.
> I'm in the CV out design of my sequencer and
> I need so much your thoughts on that.
> 
> A:
> 
> |\
> | \ 
> |  \ 
> |   \ 
> |    \ 
> |     \ 
> incoming CV  |  |   \ 
> --------------| ---   \ 
> |  |     \_____/\/\/\____ CV OUT
> |        / | 
> |       /  | 
> |      /   | 
> ----| --- /    | 
> |   |    /     | 
> |   |   /      | 
> |   |  /       | 
> |   | /        | 
> |   |/         | 
> |   |          |
> |              | 
> |--------------| 
> 
> B:
> 
> |\
> | \ 
> |  \ 
> |   \ 
> |    \ 
> |     \ 
> incoming CV  |  |   \ 
> --------------| ---   \ 
> |  |     \_____/\/\/\__ __ CV OUT
> |        /             |  
> |       /              |  
> |      /               |  
> ----| --- /                |  
> |   |    /                 |  
> |   |   /                  |  
> |   |  /                   |  
> |   | /                    |  
> |   |/                     |  
> |   |                      |  
> |                          |  
> |--------------------------|
> 
> Thanks
> J-P
> _______________________________________________
> Synth-diy mailing list
> S
> ynth-diy at dropmix.xs4all.nlhttp://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> -- 
> Harry Bissell & Nora Abdullah 4eva
> 
> 
>