A 460 MHz at 397 mV 26 GHz at 13 V 32 bits VLIW DSP Embedding F MAX Tracking E

Abstract

Wide voltage range operation for DSPs brings more versatility to achieve high energy ef ficiency in mobile applications. This paper describes a 32 bits DSP fabricated in 28 nm Ultra Thin Body and Box FDSOI technology. Body Biasing Voltage ( V B B )s c a l i n gf r o m0Vu pt o± 2Vd e c r e a s e st h ec o r eV D D M I N to 397 mV and increases clock frequency by +400%@500 mV and +114%@1.3 V. The DSP frequency measurements show 2.6 GHz@1.3 V(VDD)@2 V(VBB) and 460 MHz@397 mV(VDD)@2 V(VBB). The lowes