Signaling improvement using extended transmission lines on high speed DIMMS

A Memory Module board comprising:

• a printed circuit board having first and second opposing surfaces;
• a plurality of memory modules mounted on the first surface of the printed circuit board;
• a module bus comprising a plurality of separate parallel electrical conductors extending between first and second ends thereof which are printed on the printed circuit board, the plurality of parallel electrical conductors being coupled to predetermined ones of the memory modules between first and second ends of the plurality of conductors, and each conductor having a portion thereof extending beyond the last memory module around an edge of the printed circuit board and along an unused section of the second surface of the printed circuit board to the second end thereof by a length which is sufficient to substantially limit reflections and/or crosstalk between the conductors thereof;
• and
• a terminating resistor device coupled to second ends of predetermined ones of the plurality of electrical conductors of the module bus for providing predetermined terminating resistances thereto.

A Memory Module board comprising:

• a printed circuit board having first and second opposing surfaces;
• a plurality of memory modules mounted on the first surface of the printed circuit board;
• a module bus comprising a plurality of separate parallel continuous electrical conductors printed on the printed circuit board, the plurality of parallel electrical conductors being coupled to predetermined ones of the memory modules, and each conductor having a portion thereof extending beyond the last memory module and to a second end thereof along unused portions of the first surface of the printed circuit board by a length which is greater than a distance between adjacent memory modules and is sufficient to substantially limit reflections and/or crosstalk between the conductors thereof;
• and
• a terminating resistor device coupled to predetermined second ends of the plurality of electrical conductors of the module bus for providing predetermined terminating resistances thereto.

A printed circuit board having first and second opposing surfaces comprising:

• a plurality of circuit modules mounted on the first surface of the printed circuit board;
• a module bus comprising a plurality of separate parallel continuous electrical conductors extending between first and second ends thereof which are printed on the printed circuit board, each of the plurality of parallel electrical conductors being coupled to predetermined ones of the circuit modules, and each conductor having a portion thereof extending beyond the last circuit module and to the second end thereof by a length which is greater than a distance between adjacent memory modules and is sufficient to substantially limit reflections and/or crosstalk between the electrical conductors;
• and
• a terminating resistor device coupled to second ends of predetermined ones of the plurality of electrical conductors of the module bus for providing predetermined terminating resistances thereto.