Integrated capacitor and inductors/transformers utilising insulated amorphous metal ribbon.

摘要

A discrete device (10) in which a capacitive and inductive function has been integrated comprises at least two insulated amorphous ribbons (12,14) which are spirally wound to form a cylindrical toroid. Each of the amorphous metal ribbons is insulated from each other ribbon by a dielectric layer (16,18) and wound in a stacked configuration to provide the capacitive function. One or more conductive windings (34,36) are then wrapped around segments of the cylindrical toroid to provide inductive and/or transforming functions as desired. A magnetic circuit is formed through the windings by the amorphous metal ribbons. The dielectric insulating layer (16,18) between the ribbons is offset from the longitudinal edge of the ribbon so that the longitudinal edge of each ribbon is exposed. One ribbon has its longitudinal edge exposed on one side of the toroid while another ribbon has its longitudinal edge exposed on the opposing side of the toroid. Electrical contacts (32,30) are then laid across an intersecting line contacting the exposed edge of each ribbon at a plurality of points. As a result, the electrical series resistance of each ribbon within the device is minimised thereby rendering a device practical for use within a power circuit.