On Fri, Jun 15, 2018 at 7:58 PM Gene Heskett <ghesk...@shentel.net> wrote:
> On Friday 15 June 2018 20:20:20 jeremy youngs wrote: > > Aerotech mentions > using 741's (op-amps) but the gain of a 741 above 10 hz falls like a > rock, and that leaves the nyquist phase v stability angles in doubt. If the paper suggests using a 741, then the paper is very old. Today you can of course buy better op amps. And of course today a micro controller can precisely measure an qucoder at any speed from zero up to some MHz. If you can, the simplest way is to connect the digital encoder to the mesa card, let it keep the position count then use that any way you wish, possible to create the analog output you want I would not build an analog, op amp based digital rate the analog output converter even with modern op amps. That is not the best solution in 2018. A digital counter is the way to do. It is easy to make and as exact as you want. But I think the existing FPGA based hardware should be able to count and you'd not need to actually build anything. -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
