[IBIS-Users] RE: Query on Ccomp parameter for IBIS model

Girija/Amitava,

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forums, because they would overload the servers too much...

From within the voltage range of your signal swing, pick the
smallest value of those capacitances for C_comp-min and the
highest value for C_comp-max and put the average of those
two in C_comp-typ.

I hope this helps,

Arpad
===============================================================

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Girija V Chougala
Sent: Wednesday, July 03, 2013 5:39 AM
To: ibis-users@eda.org
Cc: Amitava Banerjee
Subject: [IBIS-Users] RE: Query on Ccomp parameter for IBIS model

Hi All,
As attachment is huge, sending data again which I have simulated for bias voltage versus capacitance.
param_dcbias    C_comp            temperature

    0.                        2.880e-12             85.0000
    0.2000               2.937e-12            85.0000
    0.4000               2.880e-12            85.0000
    0.6000               2.837e-12            85.0000
    0.8000               2.768e-12            85.0000
    1.0000               2.600e-12            85.0000
    1.2000               2.343e-12            85.0000
    1.4000               1.902e-12            85.0000
    1.6000               1.922e-12            85.0000
    1.8000               1.960e-12            85.0000
Please let me know which value I should use in my IBIS model.

Regards,
Girija/Amitava
From: Girija V Chougala
Sent: Wednesday, June 26, 2013 2:15 PM
To: ibis-users@eda.org<mailto:ibis-users@eda.org>
Cc: Amitava Banerjee
Subject: Query on Ccomp parameter for IBIS model

Hi,

I have worked on deriving C_comp value for an I/O buffer (used the same technique given in IBIS cookbook - http://www.vhdl.org/ibis/cookbook/cookbook-v4.pdf ). The Vcc of the device is 1.8V.

I have simulated C_comp for different bias voltages (VDC) - 0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8.

The different C_comp values obtained are given in the attached bmp file. Please let me know which value should I use in my IBIS model.

Thanks & Regards,
Amitava
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