A 0.4 V 21.6 nW Duty Cycle Generator Based on Compact Pulsed Modulator for MEMs Sensing Interface

This paper presents a 0.4 V duty cycle generator based on compact pulsed modulator architecture for Micro-Electromechanical Systems (MEMS) sensing interface. It compares favorably against literature in power performance (21.6 nW) through adopting of current re-used amplifiers and Schmitt trigger based pulsed generator with self-biasing architecture in subthreshold operations. Further simulations confirm the circuit functionality which shows varying duty cycles with sensing frequencies below 1 kHz. The design only occupies active area of 0.031 mm2 and is fabricated on 0.18 µm Complementary Metal Oxide Semiconductor (CMOS) technology.