Bypass caps (was:Re: [sdiy] Silly question about dual vs. quad op amps

[James Patchell]

Probably, in reality, bypass caps can be reduced on my boards to 
practically none.  I consider them just cheap insurance.  One bypass cap 
per power supply pin is just a good rule of thumb I like to live by.  Now, 
if the requirements for a circuit specify a certain production cost...well, 
I would seriously look into it.  But for DIY quantities, the time 
investigating how many bypass caps are really necessary exceeds the benefits.

At 05:14 PM 12/5/2005 +0100, you wrote:
>I get much cleaner layouts using duals
> > and singles.  And two duals just don't take up that much more 
> room.  (Well,
> > they do take up a bit more on my boards because they require 4 bypass caps
> > rather than 2... :-)
>
>Which raises a question how many bypass caps you really need.
>If the circuit works with a 074 and 2 caps, it should also
>work with two 072's in close proximity, and 2 caps, shouldn't it?
>
>JH.
>
>-------------------------------------------------
>debitel.net Webmail

         -Jim
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