Title :
A 0.6V all-digital body-coupled wakeup transceiver for IoT applications
Author :
Whatmough, Paul N. ; Smart, George ; Das, Shidhartha ; Andreopoulos, Yiannis ; Bull, David M.
Author_Institution :
ARM Ltd., Cambridge, UK
Abstract :
A body-coupled symmetric wakeup transceiver is proposed for always-on device discovery in IoT applications requiring security and low-power consumption. The wakeup transceiver (WTRx) is implemented in 65nm CMOS, using digital logic cells and operates at 0.6V. A directly-modulated open-loop DCO generates an OOK-modulated 10MHz carrier, with a frequency-locked loop for intermittent calibration. A passive receiver incorporates a digital IO cell as hysteretic comparator, with a two-phase correlator bank. A novel MAC scheme allows for duty-cycling in both transmitter and receiver. Measured power consumption is 3.54μW, with sensitivity of 88mV and maximum wakeup latency of 150ms.
Keywords :
CMOS logic circuits; Internet of Things; access protocols; amplitude shift keying; comparators (circuits); frequency locked loops; low-power electronics; power consumption; radio transceivers; telecommunication control; CMOS; Internet of Things; IoT applications; MAC scheme; OOK-modulated carrier; WTRx; all-digital body-coupled wakeup transceiver; always-on device discovery; body-coupled symmetric wakeup transceiver; digital IO cell; digital logic cells; digitally contolled oscillator; directly-modulated open-loop DCO; duty-cycling; frequency 10 MHz; frequency-locked loop; hysteretic comparator; low-power consumption; passive receiver; power 3.54 muW; size 65 nm; time 150 ms; two-phase correlator bank; voltage 0.6 V; voltage 88 mV; wakeup latency; Correlators; Frequency locked loops; Power demand; Receivers; Sensitivity; System-on-chip; Transceivers; BCC; DCO; FLL; OOK; WTRx; wakeup;
Conference_Titel :
VLSI Circuits (VLSI Circuits), 2015 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-86348-502-0
DOI :
10.1109/VLSIC.2015.7231338
