Accuracy improvement of the output impedance model for capacitive down-converters

作者：Van Breussegem Tom^*; Steyaert Michiel

来源：Analog Integrated Circuits and Signal Processing, 2012, 72(1): 271-277.

DOI：10.1007/s10470-012-9858-z

• Capacitive DC-DC converter
• Output impedance model
• Output capacitor
• CMOS

Contemporary models fail to include the influence of the output buffer capacitor size on the performance of capacitive DC-DC converters. This letter examines the relevance of this dependency and shows how to adapt existing models in order to include it. The improved model is verified mathematically for down-converters, by means of Spice simulations and based on measurements of silicon integrated prototypes. Measurements demonstrate an accuracy improvement of up to 30 % compared with the conventional model.

• 出版日期2012-7