On-chip transformer balun

Details On-chip transformer balun On-chip transformer balun

2005-04-19

2005-04-19

Mai, Anh (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S223000, C336S232000

Reexamination Certificate

active

06882263

ABSTRACT:
A transformer balun is obtained that is symmetrical in structure, provides high current, or high voltage, amplification and has high coupling coefficients while maintaining minimal overall size. The balun structure includes primary and secondary metal windings at separate layer interfaces. The primary and secondary metal windings are symmetrical and can have any number of turns, which is only limited by integrated circuit area and capacitance. Accordingly, the, primary and secondary windings may be on as many layers as needed. Further, the primary and/or secondary may include a center tap ground, which enables the winding to be used as a differential port.

REFERENCES:
patent: 4803453 (1989-02-01), Tomono et al.
patent: 4816784 (1989-03-01), Rabjohn
patent: 5477204 (1995-12-01), Li
patent: 6097273 (2000-08-01), Frye et al.
patent: 6608364 (2003-08-01), Carpentier
patent: 20030071706 (2003-04-01), Christensen

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