Integrated transformer balun with enhanced common-mode rejection for radio frequency, microwave, and millimeter-wave integrated circuits
US9330832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Feb 13, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus and method example embodiments provide an improved common mode rejection ratio in high frequency transformer baluns. According to an example embodiment of the invention, an apparatus comprises a first winding of at least one turn forming a primary coil, having first and second differential leads oriented in a first direction, the primary coil formed in a first conductive layer over a substrate and the first differential lead of the primary coil being grounded; and a second winding of at least one turn forming a secondary coil, having a third and fourth differential leads oriented in a second direction offset by an angle of greater than zero degrees and less than 180 degrees from the first direction, the secondary coil formed in a second conductive layer separated by an insulating layer from the first conductive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.