Core Technology, Inc.

Jack A Redilla

A planar transformer including a Faraday shield between primary and secondary windings. The Faraday shield is a conductive layer having low conductivity areas. The low conductivity areas may be almost any pattern. The Faraday shield and the windings of the planar transformer formed on a circuit board. A voltage source such as ground is connected to the Faraday shield.

Faraday shield and method

A circuit for detecting whether or not an AC voltage mains is providing an AC voltage above a predetermined point including a full wave bridge and voltage divider, a voltage detection circuit including a pair of transistors and a zener diode, an optical coupler including a light emitting diode (LED) and photo transistor, a comparator circuit for determining whether or not the AC voltage source has been below a predetermined voltage for a predetermined length of time including a comparator circuit such as a comparator or a FET.

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Sheffield Lake, OH, United States of America

Jack A Redilla