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Threshold voltage-level change in ASK demodulator related to RF input signal amplitude for the ultra-high frequency RFID passive tag

Published online by Cambridge University Press:  23 November 2015

Rezvan Dastanian ,
Ebrahim Abiri  and
Khadije Taherinia
Rezvan Dastanian
Affiliation:
Imam Hussein Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran. Phone: +989166728851
Ebrahim Abiri*
Affiliation:
Department of Electrical and Electronics Engineering, Shiraz University of Technology, Modarres Boulevard, Shiraz, Iran
Khadije Taherinia
Affiliation:
Department of Electrical and Electronics Engineering, Shiraz University of Technology, Modarres Boulevard, Shiraz, Iran
*
Corresponding author: E. Abiri Email: abiri@sutech.ac.ir
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Abstract

In this paper, an amplitude shift keying (ASK) demodulator with 100% modulation depth is proposed. In order to achieve the higher power and wider reading range the designed ASK demodulator works in the ultra-high frequency. In this design, the average detector and voltage divider are used in order to define the appropriate threshold voltage level for the radio frequency input signal which leads to the accurate data detecting even at long distances between the tag and reader. In addition, for diminishing the power dissipation of the proposed demodulator, an enable input is used in the buffer and comparator. This circuit is simulated in 0.18 μm complementary metal–oxide–semiconductor (CMOS) technology with Cadence software. Its power dissipation and chip area are 3.9 nW and 0.0025 mm2, respectively.

Keywords

RFID and sensorsCircuit design and applications
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 1 , February 2017 , pp. 9 - 16
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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