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US 7,405,636 B2Granted
Passive polyphase filter
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasayuki Ozasa, Akio Yokoyama, Manabu Ookubo, Takao Soramoto
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasayuki Ozasa, Akio Yokoyama, Manabu Ookubo, Takao Soramoto
Estimating the term…
Four input nodes I1-I4 for inputting 4-phase signals, four resistors R1-R4, four capacitors C1-C4, and four output nodes O1-O4 for 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-R3c and R4a-R4c are collected respectively and arranged in the same attitude, while the partial resistors R1a-R1c of 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.
A passive polyphase filter comprising input nodes of m in number for inputting m-phase signals, resistors of m in number, capacitors of m in number, and output nodes of m in number for outputting m-phase signals, formed on a same board of an integrated circuit where m denotes an integer not less than 3, the resistors and the capacitors being connected alternately in a loop, the input nodes and the output nodes being connected alternately to the respective nodes between the resistors and the capacitors sequentially, wherein
A passive polyphase filter comprising four resistors, four capacitors, four input nodes for inputting 4-phase signals and four output nodes for outputting 4-phase signals, formed on a same board of an integrated circuit, the resistors and the capacitors being connected alternately in a loop, and the input nodes and the output nodes being connected alternately to respective nodes between the resistors and the capacitors sequentially, wherein
A passive polyphase filter comprising four resistors, four capacitors, four input nodes for inputting 4-phase signals and four output nodes for outputting 4-phase signals, formed on a same board of an integrated circuit, the resistors and the capacitors being connected alternately in a loop, and the input nodes and the output nodes being connected alternately to respective nodes between the resistors and the capacitors sequentially, wherein
Dependencies are inferred from the claim text.