Microstimulator for Endocardial Stimulation

Shuenn Yuh Lee, Mario Yucheng Su

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter presents a programmable real-time detection and stimulation system-on-a-chip with smart powering management, immediate neural signal acquisition, and wireless rechargeable circuits. The power management unit, which includes a rectifier, battery charging and detection, and a regulator, is utilized for the power and supply control of the implanted circuits. The stimulation data and required clock are extracted by a phase-locked loop (PLL)-based phase shift keying (PSK) demodulator from an inductive AC signal. The full implantable chip that consumes only 48 µW is fabricated in a TSMC 0.35 µm 2P4M standard CMOS process to perform the monitoring and pacing functions with inductively powered communication. The rat’s intracardiac electrogram is employed as the stimulated model in the animal study. Therefore, an in vivo experimentation using Sprague-Dawley (SD) rats is studied to demonstrate the performance of proposed system.

Original languageEnglish
Title of host publicationHandbook of Biochips
Subtitle of host publicationIntegrated Circuits and Systems for Biology and Medicine
PublisherSpringer New York
Number of pages27
ISBN (Electronic)9781461434474
ISBN (Print)9781441993182
Publication statusPublished - 2022 Jan 1

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Computer Science


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