An Integrated Switch in a HV-SOI Wafer Technology, With a Novel Self-Protection Mechanism

Authors

  • Matías Miguez
  • Joel Gak
  • Alfredo Arnaud

DOI:

https://doi.org/10.29292/jics.v5i1.305

Keywords:

High voltage CMOS, HV technology, Medical devices

Abstract

An integrated switch to control electrical stimuli in implantable medical devices is presented. First a self-biased protection mechanism to avoid VGS reaching maximum rated value is presented. Then, using a HV-CMOS technology this technique is incorporated in a fully integrated switch, to control 0 to 16V, and 0 to 30 mA, pulses for implantable stimulators. Because of the low supply voltage VDD between 2 to 5V, and safety considerations in implantable devices, special level shifters, drivers, and a voltage multiplier, that drive a large 40000μm/3μm dual-in-series PMOS switch, were necessary for the circuit. The circuit was fabricated in a HV 0.6μm CMOS technology in SOI wafer for transistor isolation, and tested. Measurement results that closely fit the expected performance of the circuit are presented.

Additional Files

Published

2020-11-21