Accepted paper in SOCC’15


NISC Center would like to congratulate Eng. Ahmed Ammar and Dr. Rafik Guindi for their accepted papers in the IEEE International System-on-Chip Conference (SOCC), in Beijing, China.

[1] A. M. Ammar, R. Guindi, E. Shih, C. Tokunaga, J. Tschanz, and M. Khellah, “A Fully Integrated Charge Sharing Active Decap Scheme for Power Supply Noise Suppression”, IEEE International System-on-Chip Conference (SOCC), Sep. 2015.

Power supply noise has become a major challenge for proper operation of circuits with continuous scaling of CMOS technology along with supply voltage scaling. Conventional passive decoupling capacitors exhibit significant die area penalty resulting in a limited regulation effect. This paper presents a fully integrated charge-sharing-based active decap scheme for power supply noise suppression. The proposed idea is based on allocating a portion of the available passive decap to be used as an active decap that is charged up to a higher voltage and shares its boosted charge with the noisy rail upon droop detection. The proposed scheme uses a charge pump for providing the higher voltage node, as well as a detector circuit for droop detection. The system is implemented in 32 nm CMOS process, and achieves up to ~47% worst-case droop reduction with reduced ringing and settling time, at minimal area and power penalties.
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