Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-05-17
2005-05-17
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S167000, C333S185000, C336S200000
Reexamination Certificate
active
06894585
ABSTRACT:
A cable television diplexer and telephony module that can be employed in CATV data transmission systems to enhance performance levels and reduce manufacturing costs. The cable television diplexer and telephony module includes a printed circuit board substrate, and a diplexer having a low pass filter section and a high pass filter section, each of which has components mounted on the substrate. The respective low pass and high pass filter sections of the diplexer include one or more high Q value planar spiral inductors. Each spiral inductor includes a narrow track of metal disposed on the substrate and wound around a center to form a circular spiral curve having a plurality of turns. The spiral inductor may be fabricated on the substrate of the cable television diplexer and telephony module, or on a separate substrate, using a standard PCB fabrication process.
REFERENCES:
patent: 6175727 (2001-01-01), Mostov
patent: 6285865 (2001-09-01), Vorenkamp et al.
patent: 6295554 (2001-09-01), Karadogan et al.
patent: 6380608 (2002-04-01), Bentley
patent: 6590473 (2003-07-01), Seo et al.
Keeney Bill Allen
Wallace Deirdre Anne
Glenn Kimberly
M/A-Com Inc.
Pascal Robert
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