A Sub-100-μW 0.1-to-27-Mb/s Pulse-Based Digital Transmitter for the Human Intranet in 28-nm FD-SOI CMOS

Abstract

Human body communications require energyefficient transceivers to connect diverse devices on the human body for wellness and medical applications. This paper presents a fully digital pulse-based transmitter (TX) for capacitive bodycoupled communications (c-BCC) in 28 nm FD-SOI CMOS. The transmitter is operating at 450 MHz where surface wave (SW) propagation is the dominant mechanism of capacitive body coupled communication (c-BCC), offering a larger bandwidth with a more stable channel. The heavily duty-cycled transmitter uses a 90 MHz free-running oscillator and edge combiners to generate OOK Gaussian-shaped pulses through a switchedcapacitor PA. Wide range forward body-biasing (FBB), specific to FD-SOI technology, allows frequency tuning and adaptive efficiency optimization as a function of data rate. The proposed transmitter consumes 17 to 76 µW for flexible data rates from 0.1 to 27 Mb/s (170 pJ/b down to 2.8 pJ/b) with up to 14 % system efficiency under 0.5 V supply voltage.

Simulation study of trap-induced noise characteristics in FDSOI MOSFETs

“…[2][3][4][5] Additionally, FDSOI display radiation tolerance 6,7) and robustness across a wide temperature range. 8,9) As a result, they have demonstrated advantages in many fields such as wearable devices, 10,11) aerospace, 12,13) image sensor 14,15) and quantum computing. 16,17) As the device scales down, the low-frequency noise of the device continues to increase, 18,19) and the noise characteristics becomes essential especially for those high-performance applications.…”