We've put everything you need to know about output impedance measurement on one
web page here
https://www.picotest.com/measurements/2-port.html
Also look for my upcoming Signal Integrity Journal webinar about measuring and
interpreting impedance data.
steve
Steven M. Sandler
Managing Director
www.picotest.com
(480) 375-0075
On Mon, Jul 1, 2019 at 10:08 PM -0700, "FreeLists Mailing List Manager"
<ecartis@xxxxxxxxxxxxx> wrote:
si-list Digest Mon, 01 Jul 2019 Volume: 19 Issue: 145
In This Issue:
#1: From: "Madhu KR (ERS-ESG), HCLTech"
Subject: [SI-LIST] LPDDR4 _CE inclusion in simulation
#2: From: agathon
Subject: [SI-LIST] VRM (smps) Zout vs. frequency measurement:
How To?
#3: From: Binayak Shrestha
Subject: [SI-LIST] Re: VRM (smps) Zout vs. frequency
measurement: How
#4: From: "Istvan Novak" (Redacted sender
Subject: [SI-LIST] Re: VRM (smps) Zout vs. frequency
measurement: How
----------------------------------------------------------------------
Msg: #1 in digest
From: "Madhu KR (ERS-ESG), HCLTech"
Subject: [SI-LIST] LPDDR4 _CE inclusion in simulation
Date: Mon, 1 Jul 2019 10:38:26 +0000
Hi All
With the LPDDR4
Is CE the signal used for any ACC Training?
(I read through the JEDEC spec where that there is only mention of using CE
when writing trained values into Mode registers )
Since the CE is always high, should it be a part of Simulation while
simulating in Hyperlynx
Or can that be left out from ACC bunch
If you include the VREF level is pushed up and I am seeing violation in ACC.
With the same setup if it is omitted no violations observed In Eye Mask.
Thanks
Madhu
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------------------------------
Msg: #2 in digest
From: agathon
Date: Mon, 1 Jul 2019 13:53:53 -0400
Subject: [SI-LIST] VRM (smps) Zout vs. frequency measurement: How To?
Small-signal Zout measurement...
This is the primary f-domain characterization of a SMPS.
What is the actual lab setup for this?
(I don't need brand/model instrument recommendations, but separately ok).
I assume the answer is something like ...
the feedback pin node has freq.-swept noise coupled into it and output V,I
are measured (with some nominal dc load). No?
Regards and Thanks.
----------------------------
------------------------------
Msg: #3 in digest
From: Binayak Shrestha
Date: Tue, 2 Jul 2019 01:31:53 +0530
Subject: [SI-LIST] Re: VRM (smps) Zout vs. frequency measurement: How To?
Agathon,
You can find numerous articles from steve sandler on this topic.
They will help you to accurately measure the output impedance.
Binayak.
Warm Regards,
Binayak Shrestha
Senior Research Engineer,
C-DOT Centre for Development of Telematics
On Mon, Jul 1, 2019 at 11:24 PM agathon wrote:
Small-signal Zout measurement...
This is the primary f-domain characterization of a SMPS.
What is the actual lab setup for this?
(I don't need brand/model instrument recommendations, but separately ok).
I assume the answer is something like ...
the feedback pin node has freq.-swept noise coupled into it and output V,I
are measured (with some nominal dc load). No?
Regards and Thanks.
----------------------------
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Small-signal Zout measurement...
This is the primary f-domain characterization of a SMPS.
What is the actual lab setup for this?
(I don't need brand/model instrument recommendations, but separately ok).
I assume the answer is something like ...
the feedback pin node has freq.-swept noise coupled into it and output V,I
are measured (with some nominal dc load). No?
Regards and Thanks.
----------------------------
