title: A Programmable Implantable Microstimulator SoC With Wireless Telemetry: Application in Closed-Loop Endocardial Stimulation for Cardiac Pacemaker.
abstract: A low-power, wireless, and implantable microstimulator system on chip with smart powering management, immediate neural signal acquisition, and wireless rechargeable system is proposed. A system controller with parity checking handles the adjustable stimulus parameters for the stimulated objective. In the current paper, the rat's intra-cardiac electrogram is employed as the stimulated model in the animal study, and it is sensed by a low-voltage and low-power monitoring analog front end. The power management unit, which includes a rectifier, battery charging and detection, and a regulator, is used for the power control of the internal circuits. The stimulation data and required clock are extracted by a phase-locked-loop-based phase shift keying demodulator from an inductive AC signal. The full chip, which consumes 48 μW only, is fabricated in a TSMC 0.35 μm 2P4M standard CMOS process to perform the monitoring and pacing functions with inductively powered communication in the in vivo study.
authors.lastname: Shuenn-Yuh Lee
authors.forename: M Y
authors.initials: MY
authors.lastname: Su
authors.lastname: Ming-Chun Liang
authors.lastname: You-Yin Chen
authors.lastname: Cheng-Han Hsieh
authors.lastname: Chung-Min Yang
authors.lastname: Hsin-Yi Lai
authors.lastname: Jou-Wei Lin
authors.lastname: Qiang Fang