On-chip transformers
First Claim
1. An on-chip transformer, comprising:
- a semiconductor substrate;
a dielectric layer formed on the semiconductor substrate;
a transformer having primary and secondary windings formed in the dielectric layer;
a first portion of the primary windings and a first portion of the secondary windings are formed in a first portion of the dielectric layer forming a first metal layer; and
a second portion of the primary windings and a second portion of the secondary windings are formed in a second portion of the dielectric layer forming a second metal layer.
3 Assignments
0 Petitions
Accused Products
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.
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Citations
5 Claims
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1. An on-chip transformer, comprising:
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a semiconductor substrate; a dielectric layer formed on the semiconductor substrate; a transformer having primary and secondary windings formed in the dielectric layer; a first portion of the primary windings and a first portion of the secondary windings are formed in a first portion of the dielectric layer forming a first metal layer; and a second portion of the primary windings and a second portion of the secondary windings are formed in a second portion of the dielectric layer forming a second metal layer. - View Dependent Claims (2, 3, 4, 5)
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Specification