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DAC
2000
ACM

On switch factor based analysis of coupled RC interconnects

11 years 11 months ago
On switch factor based analysis of coupled RC interconnects
We revisit a basic element of modern signal integrity analysis, the modeling of worst-case coupling capacitance effects within a switch factor (SF) based methodology. We show that the exact SF is a function of the ratio of slew times of both aggressor and victim interconnect voltages. Our main result is that 2Cc (or, SF = 2), where Cc is the static coupling capacitance, is not a correct upper bound when calculating interconnect delay in presence of crosstalk: we show that for signals modeled as finite ramps the worst case is SF = 3. This has implications for almost all signal integrity methodologies, e.g., window-based approaches that iteratively determine worst-case coupling effects. We have tested our result in a worstcase delay analysis methodology by transforming the coupled RC network to an RC network where each coupling capacitance C is replaced by a capacitance 3C to ground. SPICE simulation confirms the accuracy of worst-case delay estimates produced using SF = 3. Delay with S...
Andrew B. Kahng, Sudhakar Muddu, Egino Sarto
Added 13 Nov 2009
Updated 13 Nov 2009
Type Conference
Year 2000
Where DAC
Authors Andrew B. Kahng, Sudhakar Muddu, Egino Sarto
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