Generic Implant Architecture and Organization

  • Vinod Kumar Khanna


An archetypal implantable microsystem comprises two separate structural units: an external controlling module and a component placed inside the human body (the implant). The internal unit can be partitioned into several sections. These sections include the analog front end, memory, microprocessor (CPU), communication, and power management sections. The analog front end takes care of sensing and stimulation functions. The sensing function decides the magnitude, time, and extent of therapy to be given. It also monitors the therapy of the patient. The stimulation function looks after the output voltage or current pulse delivered by the device to the relevant part of the body. The memory unit stores the computer program and data. The microprocessor is the brain of the implanted device. Communication is established between the implanted device and the external controller for initially setting the device and for its subsequent control. The subsequent control is done to fine-tune the therapeutic parameters. Apart from data telemetry, communication is used for power delivery in rechargeable battery implants. Power management is essential to make best use of the battery life or to minimize the time duration between two consecutive charging steps, if a rechargeable battery is used.


Induction charger Resonant coupling Nonresonant coupling Voltage regulator SMPS Bandgap voltage reference MICS MEDS CPU RAM ROM OP-AMP 


  1. 1.
    Paradiso J, Borriello G, Bonato P (2008) Guest Editor's Introduction. IEEE Perv Comput 7(1):11–13Google Scholar
  2. 2.
    McDonald J, Dean S, Niewolny D et al (2011) Integrated circuits for implantable medical devices © 2011 Freescale Semiconductor. Doc. No. ICIMDOVWP REV0, pp 1–8. Accessed 30 July 2015
  3. 3.
    Yakovlev A, Kim S, Poon A (2012) Implantable biomedical devices: wireless powering and communication. IEEE Commun Mag 50: 152–159Google Scholar
  4. 4.
    Van der Velde ET, Atsma DE, Foeken H (2013) Remote monitoring of patients with implanted devices: data exchange and integration. Eur J Prev Cardiol 20(S2):8–24CrossRefGoogle Scholar
  5. 5.
    Zhang HJ (2013) Linear technology, Application Note 140: Basic concepts of linear regulator and switching mode power supplies. Accessed 27 July 2014
  6. 6.
    SMPS and linear power supply comparison Copyright © 2014 Sinrace Power Supply Technology (Shenzhen). Accessed 27 September 2014
  7. 7.
    Widlar RJ (1971) New developments in IC voltage regulators. IEEE J Solid State Circuits SC-6 (1): 2–7.Google Scholar
  8. 8.
    Fernández A, Lamar DG, Rodríguez M et al (2009) Self-driven synchronous rectification system with input voltage tracking for converters with a symmetrically driven transformer. IEEE Trans Indust Electron 56(5):1440–1445CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Vinod Kumar Khanna
    • 1
  1. 1.CSIR-Central Electronics Engineering Research InstitutePilaniIndia

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