A method is proposed for efficient placement of decoupling capacitor on a power transmission line based on calculating the critical distance between device power pin and the capacitor. The critical distance is measured from the power pin and refers to the spacing for which the capacitor's effectiveness is reduced by a predefined amount with respect to the power pin. The resulting transcendental equation is solved for the distance using an iterative approach. The proposed method is validated by comparing to full wave electromagnetic simulation results.

Additional Metadata
Keywords Capacitor effective radius, Decoupling capacitor, Power delivery network, Power integrity
Persistent URL dx.doi.org/10.1109/ISEMC.2018.8393757
Conference 60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018
Citation
Erdin, I. (Ihsan), & Achar, R. (2018). Placement of decoupling capacitors on power transmission lines. In 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018 (pp. 152–154). doi:10.1109/ISEMC.2018.8393757