As a rule more capacitance is more better, since it lowers Q, improves noise
filtering, etc. The bigger concern is higher value capacitors are rated at
lower voltage and so ferro resonance effects appear at lower voltages. Also
the ESR is typically lower and so it can Rais the Q of resonances beyond this
cap towards the chip side.
Regards,
Steve Sandler
________________________________
From: FreeLists Mailing List Manager <ecartis@xxxxxxxxxxxxx>
Sent: Sunday, September 13, 2020 10:09:59 PM
To: si-list digest users <ecartis@xxxxxxxxxxxxx>
Subject: si-list Digest V1 #74
si-list Digest Sun, 13 Sep 2020 Volume: 01 Issue: 074
In This Issue:
#1: From: srikanth chundi <srikanthchundi@xxxxxxxxx>
Subject: [SI-LIST] AC decoupling caps on Highspeed differential
signa
#2: From: Ryan Lott <ryan.lott.ee@xxxxxxxxx>
Subject: [SI-LIST] Re: AC decoupling caps on Highspeed
differential s
----------------------------------------------------------------------
Msg: #1 in digest
From: srikanth chundi <srikanthchundi@xxxxxxxxx>
Date: Sun, 13 Sep 2020 22:20:23 +0530
Subject: [SI-LIST] AC decoupling caps on Highspeed differential signals
Hi
I have a question on Decoupling Caps on high-speed differential signals.
Generally it is 0.1uF cap which we place or recommend but if we increase or
decrease the cap value what would be the effect?
Thanks
Srikanth
--
Srikanth Chundi
------------------------------
Msg: #2 in digest
From: Ryan Lott <ryan.lott.ee@xxxxxxxxx>
Date: Sun, 13 Sep 2020 12:14:01 -0500
Subject: [SI-LIST] Re: AC decoupling caps on Highspeed differential signals
It changes the cutoff frequency of the RC filter which can in turn affect
DC wander depending on the contents of the signal's frequency spectrum and
io topology. Also changes intialization time from turn-on to steady state.
On Sun, Sep 13, 2020, 11:51 AM srikanth chundi <srikanthchundi@xxxxxxxxx>
wrote:
Hi
I have a question on Decoupling Caps on high-speed differential signals.
Generally it is 0.1uF cap which we place or recommend but if we increase or
decrease the cap value what would be the effect?
Thanks
Srikanth
--
Srikanth Chundi
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