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Dr. Edith Beigne, CEA LETI, France


Wide Voltage Range Operation Using FDSOI Technology and Maximum Frequency Tracking Techniques


Wide voltage range operation DSPs brings more versatility to achieve high energy efficiency in mobile applications handling increasing signal processing complexity and a large range of performance specifications. This talk will describe UTBB FDSOI capabilities to increase energy efficiency in a 0.4V-1.3V voltage supply range while achieving very high performances. Body Biasing Voltage (VBB) scaling from 0V up to +/-2V (Pwell/Nwell) decreases the DSP core VDDMIN to 397mV and increases clock frequency by +400%@500mV and +114%@1.3V. In addition to technology gain, dedicated design features are included to increase frequency over the full VDD range in case of parameter variations. Those different techniques are dealing with maximum frequency traking tcehniques to compensate for PVT variations during operation. A data path cloning technique is proposed and timing slack monitors insertion is also proposed fitting more a wide range of operating supply voltages.


Edith Beigné joined CEA-LETI MINATEC in 1998 first working on RFID systems for biomedical applications. She focused then on asynchronous systems and circuits specifically for ultra low power mixed-signal systems and cryptographic circuits.. Since 2005, she is in charge of the low power design team within the digital laboratory developing fine-grain power control and local voltage and frequency scaling innovative features. Since 2009, her main focus is to manage power and variability issues in advanced technology nodes for high energy efficiency. She was leading complex innovative SoC design in 65nm, 32nm bulk and now in 28nm and 14nm FDSOI technologies for adaptive voltage and frequency scaling architecture based on GALS structures. Her main focus is today automatic performance regulations for ultra low power circuits.

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