The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Dec. 20, 1990
Leopold J Johnson, Valley Center, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An integrated circuit transformer (58) which is constructed in a laminar hion is disclosed. The present invention includes a bottom plate (10) with cores (14) protruding from its upper surface (13) and a top plate (16) with several feed through holes (18). Both plates (10, 16) are made from high permeability magnetic material. Interposed between the top and bottom plates (10, 16) are at least one primary (19) and at least one secondary (40). The primary (19) has feed through holes (22), vertically aligned with the feed through holes (18) in the top (16), holes (20) to allow the cores (14) to protrude through, and tabs (26, 28) for connecting to the input circuit. The primary (19) is made of a laminate clad with an electrical conductor. The circuit which conducts the current around the cores is fabricated by etching special patterns of insulative gaps (24) into the electrical conductor. The secondary (40) has holes (42) to allow the cores (14) to protrude through. It also is made of a laminate clad with an electrical conductor. And again, the circuit which conducts the current around the cores is fabricated by etching a special pattern of insulative gaps (44) into the electrical conductor. The output circuit is connected to the secondary at three connection points (48, 50, 52). These points are accessible through the feed through holes (18, 22) and access holes (49, 51). The primary (19) and secondary (40) may be fabricated as a sub-assembly by multiple layer printed circuit techniques. More than one primary (19) and secondary (40) may be utilized in the integrated transformer (58). The transformer may be embodied as either a current, a voltage or a power transformer.