17 Jul
2007
17 Jul
'07
3:54 p.m.
On 17/07/07, Michael B. Brutman <mbbrutman-cctalk at brutman.com> wrote:
Ok, looks like that was too easy. The 35 threw me ..
The caps are connected from a power rail (+5) to ground. Is there a
good tutorial somewhere that explains how capacitors are used for
decoupling and smoothing? (I've checked some obvious sources, but I
need more detail, like if you connect a cap to a +5 source and ground,
why doesn't it just discharge completely ...)
Mike
Get the cap as close to the chip as you can: think of the trace as a
(really low resistance) resistor: the resistance PS-to-cap is is much
larger than resistance cap-to-chip and bingo! low-pass filter.
Joe.