Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/212720
Title: AN IN-BODY TRANSMITTER AND ON-BODY RECEIVER USING BODY COUPLED COMMUNICATION
Authors: XIONG BO
ORCID iD:   orcid.org/0000-0003-1461-8816
Keywords: Body Coupled Communication, TX, RX, Injection-Locking Frequency-to-Amplitude Conversion, implantable devices, ultra-low power
Issue Date: 1-Aug-2019
Citation: XIONG BO (2019-08-01). AN IN-BODY TRANSMITTER AND ON-BODY RECEIVER USING BODY COUPLED COMMUNICATION. ScholarBank@NUS Repository.
Abstract: This dissertation presents a TX/RX pair using I2O-BCC for ULP miniaturized implanted applications. To miniaturize the implanted device and reduce the power, we propose: 1) the galvanic coupling for low-loss transmission, 2) the IL-F2A conversion based demodulator to eliminate the need for accurate clock reference in TX, and 3) a system partitioning strategy through I2O-BCC. We characterized the I2O-BCC characteristic through a specialized measurement setup. The I2O-BCC demonstrates low-loss communication within a wide band. The proposed IL-F2A based demodulator allows the FSK demodulation under significant TX frequency variation, enables the TX miniaturization by eliminating the need of off-chip clock reference. Integrated with an on-chip PMU, the operation hour of the implanted device is prolonged while using micro-battery. The fabricated demodulator in RX can handle > ±10% frequency variations exhibited in the TX FSK signals. The packaged in-body TX is only 7×7×2 mm^3. The TX radio consumes 8.6 µW at 500 kb/s, while the on-body RX consumes 591.5 µW to recover the data and clock for the WBAN. The radio power are 8× lower than previous.
URI: https://scholarbank.nus.edu.sg/handle/10635/212720
Appears in Collections:Ph.D Theses (Open)

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