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Design of Ultra Low Power RF Front-End Based on Current Reuse for Bluetooth Low Energy Standard

Hamzeh, Ehsan | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51824 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Safarian, Aminghasem; Atarodi, Mojtaba
  7. Abstract:
  8. Bluetooth low energy, originally developed by Nokia as wibree, was formally introduced by SIG group in 2010. It is a promising technology for internet of things (IoT) which needs ultra low power consumption. Unlike digital circuits that the power consumption decreases with technology scaling and consequently decreasing the supply voltage, the scaling has not such effect in analog circuits for two reasons. First, the power consumption of an analog circuit is mainly determined by its noise and linearity specification which in almost all cases is determined by the standard. Second, due to noise consideration, analog designers prefer to not to use the latest technology for example because of lower flicker noise. In order to reduce the power consumption, BLE has a relaxed noise and linearity requirements that helps to decrease the power consumption. In addition, to further reduce the power consumption, some circuit techniques can be exploited. One of the most effective techniques of decreasing the power consumption of an RF-front end is “current-reuse” in which, from the DC point of view, different blocks of analog circuitry share the same DC current. So it is not necessary for different block to draw independent current from V_DD resulting in tremendous power consumption. From the signal point of view, instead of cascading blocks in voltage domain the same as all conventional designs, they are cascaded in current domain. The RF front end designed using 180 nm TSMC's PDK. The overall consumption of front end is only 645 μW and 21.7 dB and 18.8 dB gain and noise figure is achieved respectively. The IIp3 is -18 dBm
  9. Keywords:
  10. Bluetooth Low Energy ; Radio Frequency Front End ; Ultra Low Power Radio Ferequency ; Current Reuse

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