Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Reexamination Certificate
2007-08-16
2008-11-25
Mai, Anh T (Department: 2832)
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
C336S223000, C336S232000
Reexamination Certificate
active
07456721
ABSTRACT:
The invention provides an on-chip transformer balun formed among N successive isolating layers. The transformer includes a primary winding and a secondary winding. The primary winding includes a plurality of first semi-turn coils, a plurality of second semi-turn coils, a plurality of metal junctions, and a plurality of first metal bridges. The secondary winding includes a plurality of third semi-turn coils, a plurality of fourth semi-turn coils, and a plurality of second metal bridges. The first semi-turn coils are connected with the second semi-turn coils by the metal junctions and the first metal bridges. The third semi-turn coils are connected with the fourth semi-turn coils by the second metal bridges. By use of the multi-layer first metal bridges, the transformer according to the invention allows a larger input current than a conventional on-chip transformer.
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A Fully Integrated 5.3-GHz 2.4-V 0.3-W SiGe Bipolar Power Amplifier With 50-Ω Omega Output, IEEE Journal of Solid-State Circuits, vol. 39, No. 7, Jul. 2004.
Birch, Stewart, Kolasch and Birch LLP
Mai Anh T
Realtek Semiconductor Corp.
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