| US 7,456,722 B1 | ||
| Programmable microtransformer | ||
| Deran S. Eaton, Waldorf, Md. (US); and Robert M. Daily, Swan Point, Md. (US) | ||
| Assigned to The United States of America as represented by the Secretary of the Navy, Washington, D.C. (US) | ||
| Filed on Sep. 27, 2007, as Appl. No. 11/973,976. | ||
| Application 11/973976 is a continuation of application No. 11/650759, filed on Dec. 15, 2006, granted, now 7,298,238. | ||
| Int. Cl. H01F 5/00 (2006.01) | ||
| U.S. Cl. 336—200 [336/150] | 17 Claims |
| 1. A programmable transformer, comprising:
a circuit board substrate;
a primary winding comprising a flat-wire trace being embedded on one side of said substrate, and a pair of input leads connecting
to said primary winding;
a secondary winding comprising a multiple-coil wire trace being embedded on another side of said substrate;
a plurality of tap leads each connecting to said secondary winding; and
a transistor switching circuit comprising a plurality of gated FETs each gated FET connecting to one of the plurality of tap
leads for selectively connecting said secondary winding to a pair of output leads,
wherein gates of said plurality of gated FETs are controlled by controls to permit dynamic adjustment of effective turns ratio
of said programmable transformer.
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