Circuit device

Details Circuit device Circuit device

2005-02-25

2008-03-18

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S185000

Reexamination Certificate

active

07345558

ABSTRACT:
Coil(s)11and coil(s)12of LC resonant circuit(s) are oriented such that their centers are mutually perpendicular. For example, coil11might be mounted so as to stand upright on printed wiring board, and coil12might be mounted so as to lie flush against printed wiring board. Such configuration permitting lines of magnetic force from coil11and coil12to be oriented so as to be mutually perpendicular, lines of magnetic force from coil11and coil12do not merge, and coil11and coil12are not electromagnetically coupled. Accordingly, inductances of respective coils11, 12are unchanged; impedance frequency characteristics of respective LC resonant circuits are maintained at what they should be; and resonant impedance(s) is/are not lowered.

REFERENCES:
patent: 5036302 (1991-07-01), Hales
patent: 5351023 (1994-09-01), Niiranen
patent: 6816037 (2004-11-01), Hoffman
patent: 9-247935 (1997-09-01), None
patent: 2003-46357 (2003-02-01), None

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