Patent
On-chip transformers
TLDR
In this article, the transformer can be constructed in a balun layout, an autotransformer layout, a layout with the secondary separated from the primary and rotated with respect to an axis of the primary, or a transformer in a toroidal layout.Abstract:
Various embodiments of on chip-transformers constructed in separate metal layers in an insulator that serves as a dielectric which is formed on a substrate such as a silicon substrate. Windings with currents flowing in a first direction are constructed in a first metal layer and windings with currents flowing a second direction are constructed in a second metal layer. Windings in the first metal layer are connected to windings in the second metal layer by connectors such as vias. The transformer can be constructed in a balun layout, an autotransformer layout, a layout with the secondary separated from the primary, a layout with the secondary separated the primary and rotated with respect to an axis of the primary, a layout in which the transformer is a two stage transformer and with the first stage constructed orthogonal to the second stage, or a transformer in which the windings are constructed in a toroidal layout.read more
Citations
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Signal isolators using micro-transformers
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TL;DR: In this paper, a logic signal isolator consisting of a transformer having a primary winding and a secondary winding, a transmitter circuit which drives said primary winding in response to a received logic signal, such that a signal of a first predetermined type is supplied to the primary winding, and a signal, of a second predetermined type, is provided to the secondary winding.
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TL;DR: In this paper, a radio frequency integrated circuit (RFIC) has a first layer bearing first metallization patterning for defining a first inductive coil, a second layer bearing second metallisation patterned for defining an electric shield or electrostatic shield.
References
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Patent
Low-temperature-cofired-ceramic (LTCC) tape structures including cofired ferromagnetic elements, drop-in components and multi-layer transformer
Carol Haertling,Andrew A. Shapiro,Charles A. Goodman,Ramona G. Pond,Robert D. Washburn,Robert F. Mcclanahan,Carlos H. Gonzalez,David M. Lusher +7 more
TL;DR: A ferromagnetic material (18,20) in ink or tape form is sinterable using the same firing profile as and has approximately the same thermal shrinkage characteristics as low-temperature co-fired-ceramic (LTCC) tape, and is chemically non-reactive therewith.
Patent
Miniature inductor for integrated circuits and devices
TL;DR: In this article, a helical electrical path which spirals about a core portion of the magnetic material in the second layer is constructed by depositing magnetic armature material to partially overlap a sacrificial support base.
Patent
Thin film transformer
TL;DR: In this paper, the first and second thin film coils have terminals that are located outside of the outer loops of the coils and side-by-side transformers whose primaries and secondaries are connected so as to form a single transformer are also disclosed.
Patent
Miniaturized thin film inductors for use in integrated circuits
Thomas H. Ramsey,Richard Shield +1 more
TL;DR: In this paper, a thin film inductor for use with miniaturized integrated circuits is fabricated by forming a first level of parallel metal strips on a substrate and then forming an insulating layer over the strips.
Patent
Method of manufacture of miniaturized transformer
Delip R. Bokil,William H. Morong +1 more
TL;DR: In this paper, a miniaturized thick-film isolation transformer comprising two rectangular substrates each carrying successive screen-printed layers of dielectric with spiral planar windings embedded therein is presented.