MC3470

[Pete Turnbull]

On 02/02/2008 22:22, Tony Duell wrote:
>>>  > Also, does anyone have a proper data sheet for the MC3470 (disk read
>>>  > amplifier etc).

> However, I still have one unaswered question : There's a DC balance 
> preset in the differntiator stage. What's the proceue for adjusting it?

It's to adjust the data symmetry, and for Sony and Apple drives that use 
a 3470, you adjust it so that the data signal has a 50% mark/space ratio 
when the input is a constant frequency (125kHz or 250kHz).

-- 
Pete						Peter Turnbull
						Network Manager
						University of York