An FSK Inductive-Coupling Transceiver Using 60mV 0.64fJ/bit 0.0016mm<sup>2</sup> Load-Modulated Transmitter and LC-Oscillator-Based Receiver in 65nm CMOS for Energy-Budget-Unbalanced Application
IEICE Transactions on Electronics2019Vol. E102.C(7), pp. 585–589
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Kenya Hayashi, Shigeki Arata, Ge Xu, Shunya Murakami, Cong Dang Bui, Atsuki Kobayashi, Kiichi Niitsu
Abstract
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 currentdriven scheme, energy reduction of the transmitter side is possible. For verifying the proposed scheme, a test chip was fabricated in 65 nm CMOS, and two chips were stacked for verifying the inter-chip communication. The measurement results show 0.64 fJ/bit transmitter power consumption while its input voltage is 60 mV, and the communication distance is 150 m. The footprint of the transmitter is 0.0016 mm 2 .