From: Jay Marano ([email protected])
Date: Mon Jun 05 2000 - 11:59:45 PDT
I'm looking for any feedback from those who have
read the white paper on the Ultracad web site
regarding ESR and Bypass self resonant behavior.
One of the things it demonstrates is that for a
given number of capacitors, better system impedance
results are obtained from using more cap values,
with moderate but not super low ESR, spread over a
range than with a smaller set of cap values, with
very low ESR, at well chosen self-resonant frequecies.
I understand the theory behind his analysis, but it
raises an interesting question: In the frequency range
between the bulk capacitors and the knee frequency of your
system, is it better to purposely use wider tolerance caps
and use a smaller number of values, or buy more tighter tolerence
values and rely on the nominal values to smooth out the system
impedance? Any feedback on this analysis would be appreciated.
Sr. Hardware Design Engineer
Maitland, FL 32751
[email protected] <mailto:[email protected]>
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected] In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:31 PST