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- Title
A HIGH-PRECISION ULTRA-LOW-POWER HYSTERETIC VOLTAGE DETECTOR USING CURRENT-BASED COMPARISON.
- Authors
WEN-XIAO GU; MENG-LIAN ZHAO; XIAO-BO WU; MINGYANG CHEN; QING LIU
- Abstract
This paper presented a high-precision, ultra-low-power hysteretic voltage detector (HVD) using current comparison to detect voltage default crossing moments for energy-harvesting systems (EHS) in wireless sensor network (WSN) applications. The HVD mainly consists of four parts: a specially designed voltage-to-current converter (VCC) with thermal stability improvement, a comparison core to make current-based comparison, a current pre-amplifier to improve its transient performance and a Schmitt inverter to provide the hysteresis characteristic. The prototype of this HVD has been implemented in SMIC 0.18/μm CMOS process and occupies 0.036 mm² area without pads. The hysteresis window is about 120 mV wide. The temperature coefficient (TC) is about --170.2 ppm°C. The average variation to different process corners can be reduced to 1.4% by MOSFET and resistor trimming. The total power consumption is only 701.5 nW when VDD is around 1.8 V.
- Subjects
LOW voltage systems; HYSTERESIS; ELECTRIC currents; ENERGY harvesting; WIRELESS sensor networks; CASCADE converters
- Publication
Journal of Circuits, Systems & Computers, 2013, Vol 22, Issue 9, p1
- ISSN
0218-1266
- Publication type
Article
- DOI
10.1142/S0218126613400057