Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:22Q3
Session:
Number:22Q3-2
LECCS-Core Model Including Inter-Block Coupling for an LSI with Multiple Power-Supply Pins
Y. Saito, M. Yasuhara,
pp.417-420
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
An EMC macro model of an LSI called LECCS-core model is under development for simulating power supply currents. An LSI usually consists of core blocks and I/O blocks. Because large DC resistance exits between core block and I/O block, each block is modeled separately in conventional modeling method. In this study, it is shown that a micro controller's I/O block has AC coupling to the core block in high frequency and it affects the impedance characteristics of the core circuit. And we improve conventional LECCS-core model to new LECCS-core model with AC coupling to I/O blocks. By using new model, transfer impedance between two core supply terminals is simulated with different external conditions on the I/O block, and the simulation result has a good agreement with measurement result.