[Mr.T]

"Mark Zacharias" wrote in message
...
Hi, Isaac. Thanks for your response. I'm shocked it has a commutator.
How
is constant speed maintained?

Timing data is recovered from the cd itself and frame sync is maintained
by
the decoder IC and motor drive circuit.

And CD motors don't spin at a constant speed (RPM) in any case, the speed
varies with track diameter.

MrT.