[sdiy] Decoupling caps?

[harrybissell]

Most of these sockets (that I've seen) have the decoupling cap from
pin 7 to 14, or 8 to 16... like a standard logic chip pinout.

Most analog chips will not match this pinout....

My votes are of course... with Jim (Patchell) and Theo... the decoupling caps
are top priority and more 'bad sh!t' happens in designs that neglect them.

I use three traces underneath the ICs... positive, ground, and negative.

H^) harry

Marvin.Jones at nokia.com wrote:

> No one has mentioned the sockets which have an integral decoupling cap built right into the socket.  Mouser carries the Mill-Max versions.  I'm sure Amp and others do them as well.  They are a bit more expensive, but a great way to save the space of the decoupling caps on a tight layout.
>
> mj
>
> > -----Original Message-----
> > From: ext charlie lamm [mailto:charlie at www2.charlielamm.com]
> > Sent: 10 January, 2003 09:36 AM
> > To: synth-diy at dropmix.xs4all.nl
> > Subject: [sdiy] Decoupling caps?
> >
> >
> > I have read often that when setting up PCB's one
> > should always use decoupling caps (.1uF or so) for
> > IC power pins.
> >
> > I am designing a PCB for the ASM-1 VCO.  I am limited
> > in board space and want to make a single sided board so
> > I can press-n-peel.
> >
> > Now, I know this may be too general a question, maybe too
> > general, but,
> > how important are the decoupling caps in a circuit like this?
> >
> > I assume decoupling would be extremely important in OTA's,
> > since they seem to react badly to poorly regulated supplies....
> > but with TL082's etc?  Can I get away with not using them
> > and still have the VCO sound decent (in tune/not too badly
> > distorted or
> > noisy).
> >
> > Maybe I can put some decoupling caps away (bigger? 10uF?)
> > from the IC's
> > where there is a bit more room on the board?
> >
> > Or should I just tweak the design to figure a way to fit these in?
> >
> >
> >