Design and Analysis of Ultra-Low Power Glitch-Free Programmable Voltage Detector Based on Multiple Voltage Copier

Teruki SOMEYA  Hiroshi FUKETA  Kenichi MATSUNAGA  Hiroki MORIMURA  Takayasu SAKURAI  Makoto TAKAMIYA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E100-C   No.4   pp.349-358
Publication Date: 2017/04/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E100.C.349
Type of Manuscript: Special Section PAPER (Special Section on Solid-State Circuit Design — Architecture, Circuit, Device and Design Methodology)
Category: 
Keyword: 
voltage detector,  voltage reference,  low power,  low voltage,  multiple voltage copier,  

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Summary: 
This paper presents an ultra-low power and temperature-independent voltage detector with a post-fabrication programming method, and presents a theoretical analysis and measurement results. The voltage detector is composed of a programmable voltage detector and a glitch-free voltage detector to realize both programmable and glitch-free operation. The programmable voltage detector enables the programmable detection voltages in the range from 0.52V to 0.85V in steps of less than 49mV. The glitch-free voltage detector enables glitch-free operation when the supply voltage is near 0V. A multiple voltage copier (MVC) in the programmable voltage detector is newly proposed to eliminate the tradeoff between the temperature dependence and power consumption. The design consideration and a theoretical analysis of the MVC are introduced to clarify the relationship between the current in the MVC and the accuracy of the duplication. From the analysis, the tradeoff between the duplication error and the current of MVC is introduced. The proposed voltage detector is fabricated in a 250nm CMOS process. The measurement results show that the power consumption is 248pW and the temperature coefficient is 0.11mV/°C.