A friend of mine designed just such a circuit, for an expensive hi-fi
turntable, it had very low 'wow and flutter' performance i.e.
stability...I'll try and get him to reveal some detail...


>
>Hello,
> I want to design a pic based DC. motor speed control. The speed should
>be variable and fairly accurate so I want to lock the motor speed to a
>crystal. Does anyone have any ideas or suggestions on where to look for
>info. on this type of application.
>                                                     Thanks
>                                                      Jim