<>/Metadata 4474 0 R/ViewerPreferences 4475 0 R>> We develop algo-rithms to compute the set of top-k aggressors … Cross talk delay depends on the switching direction of the aggressor and victim nets .
26 Aggressor Victim Delay net 1
The aggressor and the victim nets are overlapped completely along the length of the victim. <>/XObject<>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/Annots[ 17 0 R] /MediaBox[ 0 0 960 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The positive crosstalk impacts the driving cell, as well as the net, interconnect - the delay for both gets increased because charge required for the coupling capacitance Cc is more. ?��&. It is found that for segmented aggressor overlaps, this restriction gives pessimistic results. stream %���� Aggressor and victim nets switching in the same direction. Thereby we are guarding Victim net with VSS from the High Switching activity of Aggressor Net. We also propose a heuristic approach to compute the worst-case aggressor alignment that maximizes the victim receiver-output arrival time with current-source driver models. The conditions for victim and aggressor to from a crosstalk target fault are: (1) the victims should lie in the longest path; (2) the relationship between transition time at the victim line be and transition time at the aggressor line should satisfy the inequality, where can be 1- …
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Cross-talk in data path: If aggressor and victim both switch in same direction, victim transition becomes fast resulting data to arrive early, which may cause hold violation. This is known as crosstalk. The disturbance at 'A' can potentially cause a disturbance at 'V', because of the mutual coupling capacitance, and if the disturbance at 'V' crosses noise thresholdof the receiving gate 'R', then it may change the logic at the output of 'R' i.e., output of 'R', which is supposed to be at logic '1', might switch to logic '0', as it senses a logic '1' at its input, due to the noise induced on its input by the disturbance at 'A'. 4 0 obj x���Ko#E�����A�N�B�@A�$�Êì3I���ߞ��d��L�f���q�RU��G���jw˫z���|-�<>RBI��6FE���)�6�G�~&��G'ߝ{q�=>���ÛU����w_}v|����>���5��_)�a�~�d�X.
endobj VLSI-1 Class Notes Driven Victims §Usually victim is driven by a gate that fights noise –Noise depends on relative resistances –Victim driver is in linear region, aggressor in saturation –If sizes are same, Raggressor = 2-4 x Rvictim 1 1 adj victim aggressor gndv adj C VV C Ck-D = D ++ ( ) ( ) aggressor aggressor gnda adj victim victim gndv adj R CC k RC C t t--+ == + C adj C {-�����Jo��� ���F,V t���� N7�q=q��⋓7_�� endobj Digital VLSI Design Lecture 9: Routing Semester A, 2018-19 Lecturer: Dr. Adam Teman ©Adam Teman, 2018 ... • When the aggressor and victim switch in opposite directions. In this case, we can see the bump at the victim net … There are three nets running in parallel to each other.
Hi “All that glitters is not gold”…. This will affect the smooth transition of the victim node from high to low and will have a bump after half of the transition and this will result in an increase in the transition time of the victim net. There is a coupling capacitance between A and V so aggressor node will try to fast pull up the victim node. Definition.
Shielding is a process of Separating Aggressor and Victim Nets with VSS (In general gnd net) net placing in between two crosstalk nets.
During the transition on adjacent signal (aggressor net) causes a noise bump/glitch on constant signal (victim …
the aggressor-victim alignment problem signi cantly. Figure-9 shows the transition of nets. ����i��u�jg���{�����o�0N*�������6Y��VI��� <>
Due to the influence of cross coupling capacitance, switching of the signal from one net (aggressor) to the neighboring net (victim).
Refer to diagram below to understand noise-induced bump characteristics at different noise margin lev…
The disturbance at ‘A’ can potentially cause a disturbance at ‘V’, because of the mutual coupling capacitance, and if the disturbance at ‘V’ crosses noise thresholdof the receiving gate ‘R’, then it may change the logic at the output of ‘R’ i.e., output of ‘R’, which is supposed to be at logic ‘1’, might switch to logic ‘0’, as it senses a logic ‘1’ at its input, due to the noise induced on its input by the disturbance at ‘A’.
There are several tools in existence which extract resis- ... for each victim and aggressor node. presented at the 1999 International Conference on VLSI Design [17].
Here, upper and lower nets are considered as aggressor nets and the middle net is considered as the victim net. The conditions for victim and aggressor to from a crosstalk target fault are: (1) the victims should lie in the longest path; (2) the relationship between transition time at the victim line be and transition time at the aggressor line should satisfy the inequality , where can be 1- or 2-unit delay. Similarly, “All that bumps is not noise”…. This will affect the smooth transition of the victim node from low to high and will have a bump after half of the transition and this will result in a decrease in the transition time of the victim net.