An optimization routine is applied for the decoupling capacitor placement on Power Distribution Networks to identify the limit beyond which the placement of additional decaps is no longer effective, thus leading to wasting layout area and components, and to a cost increase. A specific test example from a real design is used together with the required target impedance and frequency band of interest for the PDN design. The effectiveness of the decap placement while selecting different layers of the stack-up, and while moving the upper limit of the PDN design band is analyzed. Such analysis leads to helpful insights based on the progression of the input impedance during the optimization process, and to develop useful guidelines for avoiding over-design of the PDN.
F. De Paulis and Y. Ding and M. Cocchini and C. Hwang and S. Connor and M. Doyle and S. Scearce and W. D. Becker and A. E. Ruehli and J. L. Drewniak, "A Methodical Approach for Pcb Pdn Decoupling Minimizing overdesign with Genetic Algorithm Optimization," 2022 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2022, pp. 238 - 243, Institute of Electrical and Electronics Engineers, Jan 2022.
The definitive version is available at https://doi.org/10.1109/EMCSI39492.2022.9889490
Electrical and Computer Engineering
Keywords and Phrases
decoupling capacitors; genetic algorithm; optimization; PDN; physical limitation; power integrity
International Standard Book Number (ISBN)
Article - Conference proceedings
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01 Jan 2022