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Designing a Low Power Receiver for Medical Implant Communications Service

Beigi, Amin | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50189 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Safarian, Amin Ghasem
  7. Abstract:
  8. One of the most important parameters of implanted chip in body is its ability to work for a long time without the need for battery change. Hence designing radio frequency transceivers used in these chips should be done with the lowest possible power consumption. Of course it should be noticed that for correct communication, standard specifications must be meeted. In this thesis, a receiver in medical implant communication service standard with the goal of minimal power consumption is designed. In circuit design different challenges such as low inductor quality factor, threshold voltage of transistors and usual trade-offs between receiver parameters are faced. Therefore, previous used structures are evaluated and finally a proper structure for design is proposed. In the chosen structure, low noise amplifier and mixer circuits are combined in one block. Also N-path filters are utilized for improving filtering. Active transconductance block is reused. By doing this, attempts for lowering power consumption while maintaining standards specifications meeted have been done. Then complete circuits of a low power receiver in TSMC 0.18µm CMOS technology including merged N-path low noise amplifier and mixer, oscillator, divider, baseband filter and demodulator are designed and simulated. The power consumption of whole receiver and supply voltage are respectively 1.12mW and 0.8 V
  9. Keywords:
  10. Low Noise Amplifier (LNA) ; Mixer ; Power Consumption ; N-Path Filter ; Medical Implant Communication Services (MICS)Standard ; Transconductor ; Transconductance Reuse

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