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Tactile displays have a wide range of applications in assistive technology, prosthetics, and rehabilitation. Vibrotactile stimulation shows potential to be integrated into wearable devices because of its small size, low power consumption, and relative fast responding speed. In this paper, experiments investigating vibrotactile minimal detectable level, just noticeable difference, and two point discrimination...
A low power 2.4-GHz receiver exploiting the intrinsic high quality factor (Q) of Bulk Acoustic Wave (BAW) resonators is presented. A novel way of performing simple integer division of the BAW digitally controlled oscillator (DCO) signal to address multi-channels and thus making the receiver become PLL-free is proposed in this paper. To the best of our knowledge, this work is the first one to report...
A sub-sampling RF front end which exploits the intrinsically high quality factor of MEMS devices for performing channel filtering directly at RF is proposed in this work. This narrow band filtering at RF also acts as a good anti-aliasing filter to support down-conversion by sub-sampling. The RF front end employs current reuse for amplification, mixing and filtering. A low phase noise BAW based DCO...
In this work, a sub sampling receiver front end at 2.4 GHz with high Q filtering to perform channel selection at RF is presented. A low power solution for channel selection directly at RF is proposed in this work using “pseudo-self-biased” inverter amplifier with a BAW resonator lattice as a load to realize high selectivity. This work focusses on the Bluetooth LE standard, however the front-end can...
This paper explores the use of MEMS devices such as bulk acoustic wave (BAW) and low frequency silicon resonators, in combination with digital circuits and techniques, to reach miniaturization and low power dissipation in a 2.4 GHz transceiver targeting wireless body area networks (WBAN) and wireless sensor networks (WSN) applications. Precise phase locking of the BAW digitally controlled oscillator...
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