TY - GEN
T1 - A self-biased low modulation index ASK demodulator for implantable devices
AU - Sha, Xiao
AU - Huang, Yuanfei
AU - Wan, Tutu
AU - Karimi, Yasha
AU - Das, Samir
AU - Djurić, Petar
AU - Stanaćević, Milutin
N1 - Publisher Copyright:
© 2020 IEEE
PY - 2020
Y1 - 2020
N2 - Free floating sub-mm and mm sized brain implants can communicate through a backscatter-based link in a presence of the EM field generated by the external coil. This link reduces the bandwidth requirement in the uplink communication of these implants to the external coil and enables a close-loop operation of the distributed implant system through reduced latency. The critical challenge in the link design stems from the low modulation index in the incident signal at the receiving coil. This calls for the design of the ASK demodulator that can resolve signals with low modulation index. We propose a demodulator design comprising a self-biased common-source based envelope detector that provides sufficient conversion gain and at the same time operates with a low power consumption. With 90 MHz carrier frequency and 50-kbps data rate, the ASK demodulator, implemented in 65 nm CMOS technology, resolves input RF signal with 1% modulation index consuming less than 100 nW when amplitude of the input RF signal is 200 mV.
AB - Free floating sub-mm and mm sized brain implants can communicate through a backscatter-based link in a presence of the EM field generated by the external coil. This link reduces the bandwidth requirement in the uplink communication of these implants to the external coil and enables a close-loop operation of the distributed implant system through reduced latency. The critical challenge in the link design stems from the low modulation index in the incident signal at the receiving coil. This calls for the design of the ASK demodulator that can resolve signals with low modulation index. We propose a demodulator design comprising a self-biased common-source based envelope detector that provides sufficient conversion gain and at the same time operates with a low power consumption. With 90 MHz carrier frequency and 50-kbps data rate, the ASK demodulator, implemented in 65 nm CMOS technology, resolves input RF signal with 1% modulation index consuming less than 100 nW when amplitude of the input RF signal is 200 mV.
KW - Amplitude shift keying (ASK) demodulator
KW - Implantable medical devices (IMDs)
KW - Low modulation index
KW - Self-biased
KW - Ultra-low power consumption
UR - https://www.scopus.com/pages/publications/85109307954
M3 - Conference contribution
AN - SCOPUS:85109307954
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - 2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
Y2 - 10 October 2020 through 21 October 2020
ER -