An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016mm2 Load-Modulated Transmitter and LC-Oscillator-Based Receiver in 65nm CMOS for Energy-Budget-Unbalanced Application

Kenya HAYASHI  Shigeki ARATA  Ge XU  Shunya MURAKAMI  Cong Dang BUI  Atsuki KOBAYASHI  Kiichi NIITSU  

IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.7   pp.585-589
Publication Date: 2019/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018CTS0002
Type of Manuscript: BRIEF PAPER
FSK,  IoT,  inductive-coupling,  load modulation,  low power,  

Full Text: FreePDF

This work presents an FSK inductive-coupling transceiver using a load-modulated transmitter and LC-oscillator-based receiver for energy-budget-unbalanced applications. By introducing the time-domain load modulated transmitter for FSK instead of the conventional current-driven scheme, energy reduction of the transmitter side is possible. For verifying the proposed scheme, a test chip was fabricated in 65nm CMOS, and two chips were stacked for verifying the inter-chip communication. The measurement results show 0.64fJ/bit transmitter power consumption while its input voltage is 60mV, and the communication distance is 150μm. The footprint of the transmitter is 0.0016mm2.