soundcheck;645238 Wrote: > Thx Caad. Looks great. > > My Touch looks pretty similar to yours, since quite some time. Just a > little less modified on the HW side. I put already some OsCons in. > When reading about your mods I figured that I might be able to gain > more with the local decoupling mods. > Don't worry about loosing warranty. Everybody sticking a heated iron on > the board is well aware of it I'd guess. ;) > > Thx again. > > Cheers
Hi again. Oscon caps will do a great job, but Be aware of the importance of the 100nf is a SMD. Because the leaded cap has to much induction in the leads. This induction Will make a to big xL to the leaded cap. It would Be a good idea to replace the U14 hex inverter with single inverter Gates (no buffered must Be used as the U14 already is. When a Using single gate inverter instead of a hex inverter have adwandage of very short bonding wires and you Will Be able to place the 100nf very close between the supply pin and gnd pin. A good adwise is to keep the leads as short as possible to the oscon to. Best is to use SMD oscons. Why ? Make a simple calculation by measure the lenght of tha caps leads and measure the distance of the supply pin / gnd pin to middle of U14. ADD these lenghts together and notice that 1mm lenghts of lead Will introduce approx 1nH.. Then calculate xL for the given clock frq. In other words, keep leads as short for keeping the supply ripple to minimum..= lower jitter!! ;-) Regards Caad -- Caad ------------------------------------------------------------------------ Caad's Profile: http://forums.slimdevices.com/member.php?userid=9350 View this thread: http://forums.slimdevices.com/showthread.php?t=84742 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
