Compact isolating backplane for routing electronic signals
AssigneePremisys Communications, Inc.
InventorsMarcus J. Auerbuch, Boris J. Auerbuch
Life of this patent
Estimating the term…
Abstract
A backplane circuit board for connecting network signal lines, bus signal lines, and a number of circuit cards includes a first set of traces from a first network signal connector to connectors for the circuit cards, and a second set of traces from a bus signal connector to the connectors for the circuit cards. The first set of traces and the second set of traces are separated by a uniform distance to provide electrical isolation from one another. The traces are made up of signal-active lines surrounded by signal-neutral lines for further electrical isolation. As one other mechanism for signal isolation, the backplane provides signal-neutral lines on a separate layer from, and in superposition to, the signal-active lines.
Claims18
A backplane board for electronic apparatus, the backplane board providing a first set of connections between a first set of signal lines and a plurality of circuit cards, the backplane board also providing a second set of connections between a second set of signal lines and the plurality of circuit cards, the backplane board comprising:
- a first connector for said first set of signal lines;
- a second connector for said second set of signal lines;
- a plurality of linearly-disposed circuit card connectors corresponding to said plurality of circuit cards;
- a first set of traces leading from said first connector to said circuit card connectors;
- and
- a second set of traces leading from said second connector to said circuit card connectors;
- said first and second sets of traces being disposed so that said first set of traces and said second set of traces are separated by a substantially uniform distance over a span defined by said plurality of linearly-disposed circuit card connectors.
A backplane board for electronic apparatus, the backplane board providing a first set of connections between a first set of signal lines and a plurality of circuit cards, the backplane board also providing a second set of connections between a second set of signal lines and the plurality of circuit cards, the backplane board comprising:
- a first connector for said first set of signal lines;
- a second connector for said second set of signal lines;
- a plurality of linearly-disposed circuit card connectors corresponding to said plurality of circuit cards;
- a first set of traces leading from said first connector to said circuit card connectors, said first set of traces defining a first trapezoid;
- and
- a second set of traces leading from said second connector to said circuit card connectors, said second set of traces defining a second trapezoid;
- said first and second sets of traces being disposed so a diagonal line of said first trapezoid is substantially parallel to a diagonal line of said second trapezoid.
Dependencies are inferred from the claim text.