A Highly Energy-Efficient Body-Coupled Transceiver Employing a Power-on-Demand Amplifier

He，Tao1; Zheng，Yabin1; Liang，Xu1; Li，Jiamin2; Lin，Longyang2; Zhao，Wenfeng3; Li，Yongfu1; Zhao，Jian1

2023

10.34133/cbsystems.0030

Cyborg and Bionic Systems   Impact Factor & Quartile

2097-1087

2692-7632

Wearable body sensor nodes require massive data transmission under limited energy. However, it suffers from drastically varying channel loss, which limits its energy efficiency in practical scenarios. This paper presents a power-driven body-channel transceiver (TRX), whose power consumption can be adaptively tuned against varying channel loss. An out-band programmable gain amplifier (PGA) is proposed to save power and generate a quasi-linear correlation between PGA gain and power. By using the quasi-linear gain-power relationship, we propose an auto gain/power control technique to realize on-demand power consumption. In addition, a differential balanced transmitter is designed to eliminate base-band harmonics in on-off keying modulation and increase the power delivered by the transmitter (TX). The TX and receiver (RX) of the prototype were integrated into 1 chip and fabricated in a 55-nm complementary metal oxide semiconductor process. During the measurement, 2 chips were configured as TX and RX, respectively. Both the TX and the RX were wearable, powered by lithium batteries, and attached to the subject's hands. The prototype achieved a 5.25-Mbps data rate with 16-pJ/bit energy efficiency at a 1.5-m straight-line ground path distance. Furthermore, the proposed TRX maintained stable communication within a 1.5-m distance, while dynamically reducing power consumption.

English

Others

National Key Research and Development Program of China[201-9YFB2204500];National Natural Science Foundation of China[61904104];

2-s2.0-85169554261

Scopus

1.Department of Micro/Nano Electronics,Shanghai Jiao Tong University,Shanghai,China
2.School of Microelectronics,Southern University of Science and Technology,Shenzhen,China
3.Department of Electrical and Computer Engineering,Binghamton University,Vestal,United States

He，Tao,Zheng，Yabin,Liang，Xu,et al. A Highly Energy-Efficient Body-Coupled Transceiver Employing a Power-on-Demand Amplifier[J]. Cyborg and Bionic Systems,2023,4.

He，Tao.,Zheng，Yabin.,Liang，Xu.,Li，Jiamin.,Lin，Longyang.,...&Zhao，Jian.(2023).A Highly Energy-Efficient Body-Coupled Transceiver Employing a Power-on-Demand Amplifier.Cyborg and Bionic Systems,4.

He，Tao,et al."A Highly Energy-Efficient Body-Coupled Transceiver Employing a Power-on-Demand Amplifier".Cyborg and Bionic Systems 4(2023).