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Development of Long-Range UHF-band RFID Tag chip Using Schottky Diodes in Standard CMOS Technology

I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION. Outline. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION.

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Development of Long-Range UHF-band RFID Tag chip Using Schottky Diodes in Standard CMOS Technology

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    1. Development of Long-Range UHF-band RFID Tag chip Using Schottky Diodes in Standard CMOS Technology Nhan Tran, Bomson Lee, and Jong-Wook Lee School of Electronics and Information, Kyung Hee University, 446-701, Korea

    2. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    3. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    4. Introduction In this paper, we present the characteristics of the Schottky diodes fabricated using Titanium (Ti/Al/Ta/Al)-Silicon (ntype) junction in 0.35 µm CMOS process, and the effect of the size of Schottky diode on the turn-on voltage and the input impedance of the voltage multiplier was investigated. Based on the measured results of the Schottky diodes, we have designed and tested two key building blocks for UHF-band RFID tag, high efficiency voltage multiplier, and ASK demodulator. propose architecture for the tag clock generator with digital calibration that allows the transfer of the precise RFID reader timing information to the tag. Finally, an analysis for long-range RFID tag design considering the limitation caused by the turn-on voltage of tag chip is presented.

    5. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    6. RFID Reading Range Analysis

    7. RFID Reading Range Analysis

    8. RFID Reading Range Analysis

    9. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    10. Voltage Multiplier Using Schottky Diodes

    11. Voltage Multiplier Using Schottky Diodes

    12. Voltage Multiplier Using Schottky Diodes

    13. Voltage Multiplier Using Schottky Diodes

    14. Voltage Multiplier Using Schottky Diodes

    15. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    16. ASK Demodulator

    17. ASK Demodulator

    18. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    19. Oscillator With Digital Calibration

    20. I. INTRODUCTION II. RFID READING RANGE ANALYSIS III. VOLTAGE MULTIPLIER USING SCHOTTKY DIODES IV. ASK DEMODULATOR V. OSCILLATOR WITH DIGITAL CALIBRATION VI. CONCLUSION

    21. Conclusion An analysis and fabricated Schottky diode in standard 0.35 µm CMOS process were presented for implementing the voltage multiplier for long-range 900 MHz RFID system. In addition to the detection range analysis, we presented the design of voltage multiplier, ASK demodulator, and architecture for oscillator with digital calibration.

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