1 / 42

Analog Fronted Circuit of a Micro-Stimulation Chip for Passive RFID Tag Immersed in Tissue Liquid

Analog Fronted Circuit of a Micro-Stimulation Chip for Passive RFID Tag Immersed in Tissue Liquid. 浸入仿體液被動式 RFID 標籤微電刺激晶片之類比前端電路. Student : Zi-Chiao Song Adviser : Dr. Hung-Chi Yang. Outline. Motivation -Implanted antennas for medical applications - S pecific A bsorption R ate

marci
Download Presentation

Analog Fronted Circuit of a Micro-Stimulation Chip for Passive RFID Tag Immersed in Tissue Liquid

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Analog Fronted Circuit of a Micro-Stimulation Chip for Passive RFID Tag Immersed in Tissue Liquid 浸入仿體液被動式RFID標籤微電刺激晶片之類比前端電路 Student : Zi-Chiao Song Adviser : Dr. Hung-Chi Yang STUT BEMC LAB A303

  2. Outline • Motivation -Implanted antennas for medical applications - Specific Absorption Rate • Literature Reviews • Method and Result • Future works • References STUT BEMC LAB A303

  3. Motivation • Implanted antennas for medical applications - Biomedical telemetry (Operating at 402–405 MHz (MICS band) - Implantable Baseband SOC(System On Chip) • Specific Absorption Rate (SAR) - 1-gram averaged SAR satisfying the limitation (1.6 W/kg) of ANSI for biotelemetry Pulse Rate antenna Blood Pressure Medical Professional antenna Biomedical telemetry Implanted antenna Receptionantenna * Medical Implant Communication Services band (MICS band: 402–405 MHz) *American National Standards Institute (ANSI)

  4. Literature Reviews(1)Title Iker Mayordomo, Roc Berenguer, Andrés García-Alonso, Iñaki Fernández, and Íñigo Gutiérrez, Member, IEEE “Design and Implementation of a Long-Range RFID Reader for Passive Transponders” IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 57, NO. 5, MAY 2009 • The performance of a passive RF identification (RFID) system - The maximum distance at which the power received is strong enough to work properly - The maximum distance at which the backscattered power received by the reader is strong enough to be detected and properly demodulated

  5. Literature Reviews(1) Title • Present Result • Tags achieving long read ranges have already appeared,11 m at 868 MHz [1], 10 m at 950 MHz [2], and 12 m at 2.45 GHz[3] • SYSTEM ARCHITECTURE si(t) = Acos(2πfot + θ) [1]G. De Vita and G. Iannaccone, “Design criteria for the RF section of UHF and microwave passive RFID transponders,” IEEE Trans. Microw. Theory Tech., vol. 53, no. 9, pp. 2978–2990, Sep. 2005. [2]T. Umeda, H.Yoshida, S. Sekine, Y. Fujita, T. Suzuki, and S. Otaka, “A 950 MHz rectifier circuit for sensor network tags with 10 m distance,” IEEE J. Solid-State Circuits, vol. 41, no. 1, pp. 35–41, Jan. 2006. [3] J.-P. Curty,N. Joehl, C. Dehollain, and M. J. Declercq, “Remotely powered addressable UHF RFID integrated system,” IEEE J. Solid-State Circuits, vol. 40, no. 11, pp. 2193–2202, Nov. 2005.

  6. Literature Reviews(1) • The electromagnetic field -Reader-to-tag communication: Amplitude-shift keying (ASK) modulated carrier Bandpass Filter Digital signal Balance Modulator ASK Signal Carrier Wave

  7. Literature Reviews(1) Input : Digital Signal Output :Ask signal

  8. Literature Reviews(1) • Tag-to-reader communication(Backscatter modulation) Phase-shift keying (PSK) modulated carrier -orthogonal • EX:BPSK(Binary Phase-Shift Keying, BPSK)

  9. Literature Reviews(1) • Phase Shift Keying Circuit Block Bandpass Filter Balance Modulator Digital signal Uni-polar to Bipolar Converter PSK Signal Carrier Wave Uni-polar to Bipolar Converter Digital signal PSK Signal

  10. Literature Reviews(1) • The block diagram of the designed reader LNA(low-noise amplifier) -The input 1-dB compression point (IP1 dB) -The input third-order intermodulation intercept point (IIP3) The power amplifier (PA) is able to transmit up to 2W(33 dBm)

  11. Literature Reviews(1) • Simulation and Measurement -Step1 :Measurements without antennas A. Simulation : Agilent Advance Design System 2009 ADS B. Measurement : The local oscillator in the reader has been implemented by means of a signal generator (Agilent E4421B) The baseband data coming from the reader front-end are digitalized by means of an oscilloscope (Agilent 54846B)

  12. Literature Reviews(1) • Simulation and Measurement C. Demodulation In order to work out the system bit error rate (BER), data must be demodulated. Baseband I (In-Phase)and Q(quadrature) signals are given by (1) and(2), respectively, as follows: (1) (2) It represent the phasenoise and the noise floor at the baseband processing input :It is the variable that represents the phase shift that depends on both the channel phase shift and the oscillator phase :That is DC offsets have been eliminated by the ac coupling stage

  13. Literature Reviews(1) • Result(1):The reader performance 45.9dB 44.3dB

  14. Literature Reviews(1) Step2:Measurements with antennas Fig : Real scenario where the final measurements have taken place For the tag, a dipole antenna tuned in the 865–868MHz UHF band has been designed and fabricated

  15. Literature Reviews(1) • Result(2) -Measurements with antennas

  16. Literature Reviews(2) Implantable Functional Electrical Micro-Stimulation System 植入式功能性微電刺激系統 學生：蕭又滋 指導教授：王朝欽 國立中山大學電機工程所碩士論文 June 16,2004 • The Motivation of Thesis -The Bio-technology of electrical stimulation -VLSI (Very large scale integration) -An implantable system : The protocol of communication, and the implementation of a FES(Functional Electrical Stimulation ) SOC (System-On-chip). *FES(Functional Electrical Stimulation )功能性微電刺激 * SOC (System-On-chip). 系統晶片

  17. Literature Reviews(2) • System Function Block The circuit of electromagnetic field transform to power

  18. Literature Reviews(2) • Communication Protocol -Synchronous Pocket -Initial Pocket -Feature of Micro Electrical Stimulation: 1.It can complete the Multi-Functional applications 2.It avoid the electric charge in the initial condition

  19. Literature Reviews(2) • Data Protocol

  20. Literature Reviews(2) • Data Protocol -Manchester encoding • The transitions which signify 0 or 1 occur at the midpoint of a period • A 0 is expressed by a low-to-high transition, a 1 by high-to-low transition

  21. Literature Reviews(2) • The pocket specification of Manchester encoding • The pocket specification of RS232 Data rate:10Khz

  22. Literature Reviews(2) • Communication Protocol of NRZ encoding • Synchronization Pocket 1&2 :Synchronization Pocket3:Initial Pocket4~6:Sending the data of electrical stimulation Pocket7~9: debug

  23. Literature Reviews(2) • The state diagram S1:Idle State S2:Synchronization state S3.:Data reading state

  24. Literature Reviews(2) • The block of digital control circuit

  25. Literature Reviews(2) • The Sequential ThesequentialofErrorpocket

  26. Literature Reviews(2) • Bi-Phase Current Stimulation Circuit -D :direction -b0~b4: It control the level of Current Stimulation

  27. Method and Result • Tools software

  28. Method and Result • The analog Fronted Circuit A. Class E amplifier Mn202:Switch Cshunt: Modulate the frequency Lchoke: Steady the Current Fig:The architecture of class E amplifier

  29. Method and Result

  30. Method and Result B. Voltage rectifier and Step-down circuit Step-down Circuit Rectifier 4.5v 3v The coil distance is 1 cm. The voltage is -23.4v~23.4v

  31. Method and Result Fig1.The voltage of the coil receiver Fig2.The voltage of the Step-down circuit

  32. Method and Result C. Low Dropout-out Voltage Regulator(LDO) Fig1: The basic frame of LDO Dropout-out Voltage is 3.7mv-3.2mv=0.5mv Fig2: The power distribution of chip

  33. Method and Result

  34. Method and Result

  35. Method and Result D.ASK Modulator

  36. Method and Result

  37. Method and Result

  38. Method and Result Cascaded Inverters: Increase the Load Driver Hysteresis: define the level of high and low voltage

  39. Method and Result E.ASK modulation verification

  40. Future works • Fabricate the Tag antenna into the Tag Chip • Integrate the digital and Analog signal • Improve the performance of RFID reader • Small size

  41. REFERENCES • [1] K. V. S. Rao, P. V. Nikitin, and S. F. Lam, “Antenna design for UHF RFID tags: A review and a practical application,” IEEE Trans. Antennas Propag., vol. 53, no. 12, pp. 3870–3876, Dec. 2005. • [2] J.-P. Curty,N. Joehl, C. Dehollain, and M. J. Declercq, “Remotely powered addressable UHF RFID integrated system,” IEEE J. Solid-State Circuits, vol. 40, no. 11, pp. 2193–2202, Nov. 2005. • [3] U. Karthaus and M. Fischer, “Fully integrated passive UHF RFID transponder IC with 16.7 􀀀W minimum RF input power,” IEEE J. Solid-State Circuits, vol. 38, no. 10, pp. 1602–1608, Oct. 2003. • [4] G. De Vita and G. Iannaccone, “Design criteria for the RF section of UHF and microwave passive RFID transponders,” IEEE Trans. Microw. Theory Tech., vol. 53, no. 9, pp. 2978–2990, Sep. 2005. • [5] T. Umeda, H.Yoshida, S. Sekine, Y. Fujita, T. Suzuki, and S. Otaka, “A 950 MHz rectifier circuit for sensor network tags with 10 m distance,” IEEE J. Solid-State Circuits, vol. 41, no. 1, pp. 35–41, Jan. 2006. • [6] B.-S. Fu, Design of Bi-directional Wireless Communication for Implantable Biomicrosystem. Ms. D. Thesis, Institute of Biomedical Engineering of National Cheng Kung University in Taiwan, 2003. • [7] 陳清芳(2000年，4月)，神經義肢---癱瘓手部動起來，中央通訊社，台北市，中華民國。可連接以讀取資料之網址︰http://news.yam.com/healthy/200004/13/13785400.html • [8] B. Razavi, Design of Analog CMOS Integrated Circuits. New York: McGraw-Hill, 2001.

  42. so much!!!!

More Related