Robert G Swanson

US Patent:

52991369, Mar 29, 1994

Filed:

Jun 5, 1991

Appl. No.:

7/711466

Inventors:

Jacquelin Babakanian - Boca Raton FL
James W. Davis - Delray Beach FL
Mark S. Garvin - Boca Raton FL
Robert M. Swanson - Boca Raton FL
Nandor G. Thoma - Boca Raton FL
David M. Wu - Boca Raton FL

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

G06F 1520

US Classification:

364488

Abstract:

Groups of DCVS (Differential Cascode Voltage Switch) circuits are interconnected by single-track data transfer connections. Each group contains one or more DCVS tree circuits, through which data signals propagate only on dual-track connections. In each group, at least one DCVS tree circuit is configured as an input boundary tree, and at least one tree circuit is configured as an output boundary tree. All data inputs externally applied to a group, are transferred only through input boundary trees of the group, and all data outputs transferred out of a group leave the group only through output boundary trees of the group. If a group has only a single tree, that tree serves as input and output boundary tree of the group. Each input boundary tree of each group has one or more associated primary shift register latch (SRL) circuits through which all external data inputs to that tree are transferred. Such external data inputs are received through the single-track connections mentioned above.