Re: Sine Wave Single Ended Encoder to Differential Interpolator Input

http://groups.yahoo.com/group/Electronics_101/

these guys would have more techno-savy on chips than most groups.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "bazer_20002000" <Fredwick@...> wrote:
>
> Sorry I noted the wrong chip number the differential signal feeds into an op amp (OPA4340). I guess this is wired in differential mode so grounding the negative input would change it into a non-inverting mode in which the output is in phase with the input? And then on to the ADC.
> Fred
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "bazer_20002000" <Fredwick@> wrote:
> >
> > Hi I have a high resolution encoder that produces two 1V p-p sine waves 90 degrees out of phase and an interpolator box whoes input is 1V p-p but differential.
> >
> > Could anyone comment on the best way to connect these in a low noise environment? I am using the system to provide closed loop feedback to a separate gearbox/servo/sncoder system.
> >
> > Most of the previous topics discuss single ended TTL to Differential TTL
> >
> > I have heard from some just to ground the - terminal on the differential side. I guess would cause a difference in the line reciever (26LS32) stage of the inverter and the signal would not be rejected. It would then proceed via amplification to the ADC.
> >
> > Thanks for any help
> >
> > Fred
> >
>
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