Miniature transformers for millimachined instruments

摘要

This invention relates to the planarization of inductive components by reducing standard coiled designs to single turn designs from which the required parameters are obtained by scaling the length. Single turn designs having magnetic material encircling the conductors along their full length enable the thinnest form. The single turn form also enables the inductive component to be routed according to any shape in the plane or on any conformal surface. The single turn inductors do not need to coil hence there is no overlap necessary in the plane. The planar form allows integration of inductive components with integrated circuits. These inductive components can be embedded in other materials. They can also be fabricated directly onto parts. The differential current transformer by virtue of its fabrication next to a capacitive pick-off enables the preservation of the purity of the signal obtained by taking signal differences close to the transducer and minimizing pick-up from leads.