Method for calculating weighted average ground bounce noise...

Details Method for calculating weighted average ground bounce noise... Method for calculating weighted average ground bounce noise...

2006-11-21

2006-11-21

Paladini, Albert W. (Department: 2125)

Data processing: structural design, modeling, simulation, and em

Simulating electronic device or electrical system

Timing

C326S082000

Reexamination Certificate

active

07139691

ABSTRACT:
Ground bounce noise in a digital system is evaluated using a weighted average simultaneous switching output (“WASSO”) on an I/O bank of a digital switching device, such as a field programmable gate array (“FPGA”). The WASSO allows a designer to normalize output drivers having different characteristics on a single I/O bank. In a further embodiment, a simultaneous switching output allowance (“SSO allowance”) is calculated using scaling factors derived from values assumed in the creation of published SSO information and predicted actual values of the device in a digital system that are not represented in tables of published SSO guidelines. The SSO allowance is used in conjunction with WASSO values of adjacent I/O banks to evaluate ground bounce for adjacent I/O banks.

REFERENCES:
patent: 5160922 (1992-11-01), DeRosa et al.
patent: 5477460 (1995-12-01), Vakirtzis et al.
patent: 5838204 (1998-11-01), Yao
patent: 6864644 (2005-03-01), Kernahan
patent: 7043670 (2006-05-01), Alani et al.

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