Evaluation of Capacitor Ratios in Automated Accurate Common-Centroid Capacitor Arrays

Diaaeldin Khalil , Mohamed Dessouky , Vincent Bourguet (1) , Marie-Minerve Rosset-Louërat (1) , Andreia Cathelin , Hani Ragai

1 CIAN - Circuits Intégrés Numériques et Analogiques

In this paper, design and measurement results of a test chip that intends to evaluate differences between layout techniques for rectangular unit-capacitor arrays are introduced. Precision capacitor ratios are compared using a switched-capacitor biquad and a pseudo-floating gate configuration. The test chip is used to evaluate the effectiveness of an automatic common-centroid capacitor array generation tool with arbitrary capacitor ratios. Results indicate significant improvements in ratio accuracy, which have a direct impact on a wide range of applications such as filters for wireless communications, hard drives, and high precision baseband processing.

Domaines: Informatique [cs]

Diaaeldin Khalil, Mohamed Dessouky, Vincent Bourguet, Marie-Minerve Rosset-Louërat, Andreia Cathelin, et al.. Evaluation of Capacitor Ratios in Automated Accurate Common-Centroid Capacitor Arrays. ISQED 2005 - 6th International Symposium on Quality of Electronic Design, Mar 2005, San Jose, California, United States. pp.143-147, ⟨10.1109/ISQED.2005.54⟩. ⟨hal-01418263⟩