13-10-2016, 04:07 PM
(13-10-2016, 03:53 PM)Refugee Wrote: I was under the impression that the circle was made by a sine wave that was phase shifted to get another 180 degrees from the first.
Then there was comparitors to make it digital.
Not in the PM5544.
It is definitely digitally generated and early versions of the generator used a ferrite core memory, so it won't be very big!
Some more info here: http://forum.radios-tv.co.uk/viewtopic.php?f=5&t=7998#p83885
