Method and apparatus for transformer bandwidth enhancement

Details Method and apparatus for transformer bandwidth enhancement Method and apparatus for transformer bandwidth enhancement

2005-08-02

2005-08-02

Donovan, Lincoln (Department: 2832)

Inductor devices

With means to change coil length or connections

Plural coils

C336S212000, C336S160000, C336S181000, C324S127000, C324S253000, C324S118000, C361S232000, C361S235000

Reexamination Certificate

active

06924724

ABSTRACT:
A method and apparatus for transformer bandwidth enhancement is disclosed. In one embodiment, a transformer is provided for use in a high frequency communication environment. In one configuration, the transformer is configured with one or more compensation networks to improve high frequency operation and to reduce insertion loss at all frequencies. The compensation networks may be designed, in combination with a transformer, to create an equivalent all-pass symmetric lattice network having a frequency response in the desired range. In one embodiment, the compensation networks comprise a capacitance creating device which, when cross-connected to the transformer, increases transformer bandwidth.

REFERENCES:
patent: 5579202 (1996-11-01), Tolfsen et al.
“Producing a Counter EMF”, pp. 1-3, http://www.tpub.com
eets/book2/5e.htm , pp. 1-3, (date unknown).
“Electric Machinery, Chap. 2 Transformers -Dot Convention to Denote the Polarity of a Transformer”, p. 2A-9, (Sep. 18, 1995).
“Transformer Polarity”, Copyright 2002 Kilowatt Classroom, LLC, sheet 1.
“Use of Ferrites in Broadband Transformers”, Fair-Rite Products Corp., 14thEdition, p. 170-173 (date unknown).
“Design of H.F. Wideband Power Transformers; Part II, EC07213”, Philips Semiconductors, Mar. 23, 1998, pp. 1-10.

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