[sdiy] books on analog MOS IC design ?

[Shiloh Sison]

Hi There,

You'll have to blame National for the quad pinout -
the lm324 set the stage for everyone else. I can't
think of any reason why the layout couldn't have been
rotated to have V+ on the same side as the dual -
neither can anyone else I've talked to...I'll let you
know if I find out. The dual standard is from the 741
of course. 

-Shiloh

--- Grant Richter <grichter at asapnet.net> wrote:
> Here is a question I have ALWAYS wanted to ask.
> 
> Why, in a quad op-amp package, is pin 4 positive and
> pin 11 negative?
> 
> Of course in a dual op-amp, pin 8 is positive and
> pin 4 is negative.
> 
> Standard board layout procedure is to have all pin 1
> in same orientation.
> 
> This means that when routing quad and dual op-amps
> in a row, you need to
> flip traces and it screws up your bypass cap layout.
> 
> There must be a good reason for all the troubles
> it's caused. Please ask the
> old guys for me.
> 
> Thank you!
> 
> 
> > I'm at ADI in the precision op-amp product line
> > (basically PMI). We're still doing a lot of
> bipolar
> > but also a lot of CMOS. The 'older' guys (Derek
> > Bowers/Peter Ohlon/Paul Henneuse) tend to do most
> of
> > the bipolar amps and us younger ones get the CMOS.
> > 
> 


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