The micro controllers STM334 or XMC4xxx have high resolution timers equal to a frequency of up to a few gigz hertz.
On Tue, 25 Aug 2015 09:43:38 +0000 "Marius Liebenberg" <[email protected]> wrote: > Yes I though as much. I am running at 15us at the moment. I am thinking > to use a MCU or a small FPGA to read the low frequency PWM and then > translate that to a 40khz PWM signal. > > > >On 25 August 2015 at 10:16, Marius Liebenberg <[email protected]> > >wrote: > >> I am trying to generate a pwm signal to drive a laser power source > >>using > >> the spindle pwmgen. The minimum frequency must be 20khz. I read in > >>the > >> manual that pwmgen is not good on higher frequency. The question is > >>will > >> it reach 20khz or must I rather try using a stepgen? > > > >Stegen won't work either, that's a variable rate output, not a > >variable duty-cycle, > > > >The problem at high frequencies with pwmgen isn't with the component, > >it is with the base-thread frequency. > >What is your base-thread frequency? The output can turn on and off at > >that frequency for 50% duty cycle. > >As you drop the base frequency the number of possible duty-cycles > >increases. > > > >-- > >atp > >If you can't fix it, you don't own it. > >http://www.ifixit.com/Manifesto > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
