PROJECT TITLE :

Digitally Controlled Leakage-Based Oscillator and Fast Relocking MDLL for Ultra Low Power Sensor Platform

ABSTRACT:

This paper presents an all-digital multiplying delay-locked loop (MDLL) with a leakage-primarily based oscillator for ultra-low-power sensor platforms. The proposed digital control of channel leakage current achieved ultra-low-power consumption in frequency generation with a fine resolution. The leakage based oscillator was modeled as an RC-primarily based oscillator, analyzed, and the analyses were verified by simulation. The proposed oscillator was applied to the MDLL with a fast frequency relocking scheme which adaptively performs an optimal lock process consistent with the amount of frequency drift during the sleep state. The MDLL was implemented in sixty five nm CMOS and consumed 423 nW for three.two MHz generation, and had an energy efficiency FoM of 0.132 W/MHz.