Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2006-04-24
2008-07-29
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C455S307000
Reexamination Certificate
active
07405636
ABSTRACT:
Four input nodes I1-I4for inputting 4-phase signals, four resistors R1-R4, four capacitors C1-C4, and four output nodes O1-O4for outputting 4-phase signals are provided. The resistors and the capacitors are connected alternately in a loop, and the input nodes and output nodes are connected alternately to the respective nodes between the resistors and the capacitors sequentially. Each of the four resistors is composed of a group of three or more partial resistors, and three groups of the partial resistors R2a-R2c, R3a-R3cand R4a-R4care collected respectively and arranged in the same attitude, while the partial resistors R1a-R1cof the remaining group are distributed into the other groups and arranged in the same line the same attitude as the partial resistors of each of the other groups. The regions of the thus collected groups are arranged in one direction. By simplifying the layout of the components and the shape of the wirings, influences on the characteristics by the parasitic elements are reduced, and complication in the layout and wirings can be suppressed even when using plural stages.
REFERENCES:
patent: 7078986 (2006-07-01), Yang
patent: 7190942 (2007-03-01), Nise
patent: 2003-234406 (2003-08-01), None
Behbahani et al., “CMOS Mixers and Polyphase Filters for Large Image Rejection”, IEEE Journal of Solid-State Circuit, vol. 36, No. 6, Jun. 2001, pp. 873-887.
Ookubo Manabu
Ozasa Masayuki
Soramoto Takao
Yokoyama Akio
Ham Seungsook
Hamre Schumann Mueller & Larson P.C.
Matsushita Electric - Industrial Co., Ltd.
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