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2.1.2 GS3490 Cable Equalizer Transmitter IBIS-AMI Model
The GS3490 cable equalizer transmitter IBIS-AMI model consists of three parts: (1) the
Analog Driver IBIS model, (2) the Transmitter AMI model, and (3) the QFN package
model. The block diagram in
individual parts of the model.
Analog
AMI
Term
IBIS-AMI Model
Figure 2-4: GS3490 Cable Equalizer Transmitter IBIS-AMI Model
The Analog Driver IBIS model receives processed signal information from the
Transmitter AMI model and applies the analog characteristics of the GS3490 cable
equalizer transmit driver. The model is based on a single-ended non-inverting
characterization of the GS3490 cable equalizer transmitter and the EDA platform
develops a differential model from complimentary copies of the single-ended model.
The GS3490 cable equalizer Transmitter AMI model consists of OP_CTL parameter to
control the output driver swing and de-emphasis settings. The possible values for
OP_CTL parameter are listed in
Table 2-1: OP_CTL Parameter in Transmitter AMI Model
OP_CTL
0
1
2
3
4
5
6
7
8
As stated in
Section
2.2.1, a differential model is developed for the GS3490 cable
equalizer transmitter. Therefore, the GS3490 cable equalizer transmitter QFN package
model is provided as a 4-Port S-parameter file (GS3490_DDO.s4p) in standard
touchstone format from 0GHz to 15GHz with 1501 data points.
GS3490
User Guide
Rev.0
PDS-060922
January 2015
Figure 2-4
shows the sequence of the signal flow and the
QFN Package
(S-parameters)
Table
2-1.
Swing
De-emphasis
850mV
Off
ppd
850mV
2dB
ppd
850mV
4dB
ppd
850mV
6dB
ppd
425mV
Off
ppd
425mV
2dB
ppd
425mV
4dB
ppd
425mV
6dB
ppd
425mV
N/A
ppd
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Mute
N
N
N
N
N
N
N
N
Y
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Propietary & Confidential
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