Synchronous Precharge Logic

6

Other Precharge Logic Styles

6.1 MODL

MODL [13] stands for “Multiple Output Domino Logic” and is a nice way to get more logic functionality out of standard domino gates. It is best to look at Figure 6.1 to visualize how multiple outputs are taken from a single gate.

Figure 6.1 MODL circuit diagram.

What we have is the regular output F and an additional output F₁. F₁ is a subset of F, such that logic trees F₁∩F₂=F. So the additional function is achieved by reusing a portion of an already existing logic tree.

MODL is particularly useful for blocks, such as carry generating circuits, which have a lot of recurrent logic [13]. For such circuits, ...