Each year, more than 250,000 Americans die from sudden cardiac arrest. With recent technological advances, a portable lifesaving device called the automated external defibrillator has been invented. It is an important life saving device, and has saved many . Riedon sells resistors to some of the major defibrillator manufacturers.

Resistors are a critical part of this system. A stable and repeatable measurement of the charging voltage is a critical funtion of this circuit, as this determines the amount fo electrical energy delivered to the patient.