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An Integrated Wireless Power Management and Data Telemetry IC for High-Compliance-Voltage Electrical Stimulation Applications
- An Integrated Wireless Power Management and Data Telemetry IC for High-Compliance-Voltage Electrical Stimulation Applications
- Zhao, Jianming; Yao, Lei; Xue, Rui-Feng; Li, Peng; Je, Minkyu; Xu, Yong Ping
- DGIST Authors
- Je, Minkyu
- Issue Date
- IEEE Transactions on Biomedical Circuits and Systems, 10(1), 113-124
- Article Type
- Charge Pump; Charge Pump Circuits; Clock and Data Recovery (CDR); Closed-Loop Power Control; Cmos Integrated Circuits; Communication Channels (Information Theory); Electric Rectifiers; Electrical Stimulations; Energy Management; Forward-and-Backward; High-Compliances; High Voltage Charge Pumps; Load Shift Keying; Power Management; Power Management Systems; Recovery; Rectifier; Rectifying Circuits; Stimulator; Telemetering Equipment; Wireless Power
- This paper describes a 13.56-MHz wireless power recovery system with bidirectional data link for high-compliance-voltage neural/muscle stimulator. The power recovery circuit includes a 2-stage rectifier, 2 LDOs and a high voltage charge pump to provide 3 DC outputs: 1.8 V, 3.3 V and 20 V for the stimulator. A 2-stage time division based rectifier is proposed to provide 3 DC outputs simultaneously. It improves the power efficiency without introducing any impact on the forward data recovery. The 20 V output is generated by a modified low ripple charge pump that reduces the ripple voltage by 40%. The power management system shows 49% peak power efficiency. The data link includes a clock and data recovery (CDR) circuit and a load shift keying (LSK) modulator for bidirectional data telemetry. The forward and backward data rates of the data telemetry are 61.5 kbps and 33.3 kbps, respectively. In addition, a power monitor circuit for closed-loop power control is implemented. The whole system has been fabricated in a 24 V HV LDMOS option 1.8 μm CMOS process, occupying a core area of around 3.5 mm2. © 2015 IEEE.
- Institute of Electrical and Electronics Engineers Inc.
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