A 28 nm Bulk CMOS Fully Digital BPSK Demodulator for US-Powered IMDs Downlink Communications
| Autor: | Andrea Ballo, Alfio Dario Grasso, Marco Privitera |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
BPSK modulation
energy harvesting implanted medical devices ultra-low-power ultrasonic wireless link Energy harvesting Ultra-low-power Computer Networks and Communications Hardware and Architecture Control and Systems Engineering Signal Processing Implanted medical devices Electrical and Electronic Engineering Ultrasonic wireless link |
| Zdroj: | Electronics; Volume 11; Issue 5; Pages: 698 |
| ISSN: | 2079-9292 |
| Popis: | Low-invasive and battery-less implantable medical devices (IMDs) have been increasingly emerging in recent years. The developed solutions in the literature often concentrate on the Bidirectional Data-Link for long-term monitoring devices. Indeed, their ability to collect data and communicate them to the external world, namely Data Up-Link, has revealed a promising solution for bioelectronic medicine. Furthermore, the capacity to control organs such as the brain, nerves, heart-beat and gastrointestinal activities, made up through the manipulation of electrical transducers, could optimise therapeutic protocols and help patients’ pain relief. These kinds of stimulations come from the modulation of a powering signal generated from an externally placed unit coupled to the implanted receivers for power/data exchanging. The established communication is also defined as a Data Down-Link. In this framework, a new solution of the Binary Phase-Shift Keying (BPSK) demodulator is presented in this paper in order to design a robust, low-area, and low-power Down-Link for ultrasound (US)-powered IMDs. The implemented system is fully digital and PLL-free, thus reducing area occupation and making it fully synthesizable. Post-layout simulation results are reported using a 28 nm Bulk CMOS technology provided by TSMC. Using a 2 MHz carrier input signal and an implant depth of 1 cm, the data rate is up to 1.33 Mbit/s with a 50% duty cycle, while the minimum average power consumption is cut-down to 3.3 μW in the typical corner. |
| Databáze: | OpenAIRE |
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