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Cycle by cycle envelope detection and ask demodulation

Razavi Haeri, A. A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/IranianCEE.2019.8786394
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. In modern wireless near-filed power and data telemetry systems such as Implantable Medical Devices (IMD), a data rate of several Mbps is required, while the power carrier frequency is limited to few MHz. Therefore, bit rate is comparable to carrier frequency, and the modulated power carrier signal has amplitude, frequency, or phase variation in every cycle. In this paper a very fast amplitude shift keying (ASK) demodulator circuit is presented. The proposed demodulator is able to demodulate a cycle by cycle ASK modulated signal, and a data-rate-to-carrier (DRC) ratio of 100% is achievable. The circuit extracts the clock by limiting the incoming ASK signal. Cycle by cycle demodulation is done by discharging the envelope detector capacitor in every cycle, after sampling its voltage. The circuit functionality was verified by simulation in 0.18 μm CMOS technology, for a 10 MHz cycle by cycle modulated ASK signal, carrying 10 Mbps data
  6. Keywords:
  7. ASK demodulator ; cycle by cycle modulation ; Data-rate-to-carrier ratio ; Power and data telemetry ; Demodulation ; Demodulators ; Optical variables measurement ; Telemetering equipment ; Amplitude-shift keying demodulators ; ASK demodulators ; Circuit functionality ; Data rates ; Data telemetry ; Envelope Detection ; Envelope detectors ; Implantable medical devices ; Amplitude shift keying
  8. Source: 27th Iranian Conference on Electrical Engineering, ICEE 2019, 30 April 2019 through 2 May 2019 ; 2019 , Pages 113-117 ; 9781728115085 (ISBN)
  9. URL: https://ieeexplore.ieee.org/abstract/document/8786394