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A cycle by cycle FSK demodulator with high sensitivity of 1% frequency modulation index for implantable medical devices

Razavi Haeri, A. A ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1109/TCSI.2022.3195306
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2022
  4. Abstract:
  5. This paper presents a cycle by cycle Frequency Shift Keying (FSK) demodulator, able to demodulate a FSK signal with 1% frequency modulation index (MI), in a single cycle. Based on the proposed demodulation scheme, a high rate data transmission link can be established through a high-Q inductive coupling link, breaking the basic tradeoff between the power transfer efficiency (PTE) and data rate in single carrier wireless power and data transfer systems. Designed and simulated with 0.18μ m CMOS process, the proposed FSK demodulator, detects successfully a 5Mbps data with a carrier frequency of 5MHz. A test chip is fabricated in 180nm CMOS technology. Measurement results shows that the demodulator is able to demodulate the cycle-by-cycle modulated FSK signals with low modulation index of 2.5%, with a BER of 1.24×10-5. © 2004-2012 IEEE
  6. Keywords:
  7. Data-rate-to-carrier ratio ; FSK demodulator ; Inductive coupling ; Modulation index ; Wireless power and data transfer ; CMOS integrated circuits ; Data transfer ; Demodulation ; Demodulators ; Electromagnetic induction ; Energy transfer ; Frequency shift keying ; Inductive sensors ; Optical variables measurement ; Data-rate ; Frequency shift keying demodulator ; Frequency-shift-keying ; Index ; Inductive couplings ; Modulation indexes ; Wireless communications ; Wireless data ; Wireless sensor networks
  8. Source: IEEE Transactions on Circuits and Systems I: Regular Papers ; Volume 69, Issue 11 , 2022 , Pages 4682-4690 ; 15498328 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/9852151