Ultra-low energy systems: Analog to information

Ultra-low power systems and circuits are increasingly pivotal for many fast growing segments of semiconductor industry. A confluence of multiple technologies has brought the promising opportunity for pervasive connectivity of people and things closer than ever. Innovative system partitioning, advances in analog and digital circuit design, modern embedded sensing technologies and intelligent power management are critical to achieve the ambitious ultra-low power targets of the modern sensor nodes. In this review, we address some of the challenges and opportunities of ultra-low power system and circuit design.