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robb robb is offline
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Default critique SMT pcb ? (PCB rev 1)


"Joerg" wrote in message
. ..
[trim]

Still no bypass cap close by. This is not a super-fast opamp

but it is
isn't slow enough to go sans cap. C1/C2 are a bit far away.

Also,
driving the center of C1/C2 directly can cause some grief. Most

opamps
do not like to have a large capacitive load and may oscillate.

Hint: To make your circuits more understandable draw them with

the
individual opamp sections separated, not all in one big block.

Else
you'll sit there a few years later "What on earth does this

part here do?"

Pins 1 and 2 are connected in the layout but not on the

schematic ...
--
Regards, Joerg
http://www.analogconsultants.com/


Thanks for help,

I made some changes to accomodate the helpful advice. will this
addition cause any problems to the circuit ?

Also i do not know how one would fix the capacitive load to
preven oscillation ? The only solution i recall for these
oscillation prolems is adding a capacitor ? hopefully my addition
of small cap across opamp will solve both problems ?

thanks agian for the help.
i do appreciate the advice here in a.b.s.e and other news
groups,

robb


Attached Thumbnails
critique SMT pcb ?-esr_proj_pcb_final_2-jpg