MOD/R : A knowledge assisted approach towards top-down only CMOS VLSI design

MOD/R models all views on the design space in relations. This is achieved by eliminating the package constraints, as are apparent in PCB oriented hardware description languages. Assisted by knowledge engineering it allows for a top-down, mostly hierarchical decomposition, virtually eliminating the need for bottom-up assembly

BIGFET Logic

In BIGFET logic a bipolar device is introduced in series with the driver MOS transistor using an adapted MOS process technology. The input- and output requirements of the driver component are then split over these devices: a minimum size MOS transistor giving a minimum input time constant and a bipolar transistor converting the small MOS current to the required output current. The combination results in the same driver resistance as in the original gate at an improved speed and area consumption. Additional benefits are due to novel circuit structures with a smaller gate/function ratio.</p