1 Jul
2012
1 Jul
'12
3:57 p.m.
On 1 Jul 2012 at 18:13, Dave McGuire wrote:
Good heavens. That's got to be the most
overdesigned Z80 clock
circuit I've ever seen.
Yup--you'd think that a 74S04 would have done the trick. But the
Zilog manual cited shows pretty much the same thing--the input
feeding a resistive divider to drive a PNP-NPN "totem pole"
combination. The only really significant difference is that Zilog
uses a 10K pullup on the output.
So I'm guessing that the blue lump is very much like that.
--Chuck