[sdiy] PCB layout question

[ASSI]

On Samstag 01 November 2008, Derek Holzer wrote:
> I've got a question about decoupling caps. I'm making my first
> attempts at a layout in Eagle, starting with a very simple circuit
> from Thomas Henry to add PWM to his XR-VCO. The layout is here:
>
> http://www.soundtransit.nl/temp/pwm_test.png
>
> My question: do decoupling caps need to be directly in line with
> the rest of the circuit? Note the position of C3, for example. Will
> the power to pin 8 of the IC be properly decoupled in this layout?
> Of course, any other suggestions are welcome too!

If you want to bypass the IC, then put the cap as close as possible to 
the pin drawing the current and certainly not at the end of a long 
trace.  If you want some decoupling from upstream PS noise, put the 
caps right at the power inlet.  Depending on how fast your switching 
transients are and where your power supply is you may want to do 
none, either or both of these.


Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk]>+

SD adaptation for Waldorf rackAttack V1.04R1:
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