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Design of low-power temperature sensor architecture for passive UHF RFID tags

Karkani, M. R. G ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. Publisher: Society for Microelectronics, Electric Components and Materials , 2015
  3. Abstract:
  4. A low-power wide-range CMOS temperature sensor architecture is proposed based on temperature-to-frequency conversion using supply voltage controlled sub-threshold ring oscillator. The principles of operation are investigated and proved via analytic and simulation results. Most errors are canceled out by this ratio-metric design. An inaccuracy of -0.84°C to +0.34°C occurs over a range of -40°C to 80°C after using a novel in-field digital two-point calibration. The entire sensor consumes less than 93nW to 305nW over the temperature range and can be digitally reconfigured for setting sample rate and resolution in a tradeoff
  5. Keywords:
  6. CMOS temperature sensor ; Low-cost calibration ; RFID tags ; Temperature-to-frequency ; Wireless sensing
  7. Source: Informacije MIDEM ; Volume 45, Issue 4 , 2015 , Pages 249-259 ; 03529045 (ISSN)
  8. URL: http://www.dlib.si/stream/URN:NBN:SI:DOC-U2NSDW4U/9aeb6b13-807d-49b5-bbf6-9ff55e146fe4/PDF