Maxim Integrated Products, Inc.

Douglas Stuart Smith

Vladislav Vashchenko

Augusto Tazzoli

Lawrence Richard Skrenes

Sudhir Mulpuru

Silicon-controlled rectifier (SCR) based circuit for ECG protection under defibrillator pulse is disclosed. The SCR-based clamp is a symmetric structure for dual-direction voltage tolerance protection based on two anti-series P-well/N-well lateral blocking junctions isolated from P-substrate by the N-buried layer. The injector regions (n+/p+) are substantially lengthened in order to accommodate a larger number of contact rows than typically used for ESD pulses specification. A stack of metal layers may also be used to provide high current and heat-sink capability with each electrode metal layer fully filled with VIAs.

Integrated defibrillation pulse protector

A digital input includes a galvanically isolated section having an integrating capacitor coupled to a high voltage signal input by at least one current-limiting resistor, a relaxation oscillator coupled across the integrating capacitor, and an electronic switch controlled by the relaxation oscillator. An optical isolator has an input side and an output side, wherein the input side is coupled across the integrating capacitor by the switch, and a low voltage section includes a decoder having an input coupled to the output side of the optical isolator and having a low voltage signal output.

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Milpitas, CA, United States of America

Douglas Stuart Smith