Layout library of flip-flop circuit

摘要

Provided is a layout library having a plurality of unit layouts in which the same flip-flop circuit is implemented. In the layout library, at least two unit layouts have mutually different arrangement structures. Therefore, coupling capacitances seen at an equal node with respect to the two flip-flop circuits appear to be different from each other. A semiconductor designer can select a layout in which a desired coupling capacitance is set through wiring, and through this, can adopt a required flip-flop circuit.

主权项

1. A layout library in which a plurality of flip-flops have the same equivalent circuits and are comprised of an unit layout, and a plurality of unit layouts are combined, wherein a first unit layout has a different arrangement from a second unit layout adjacent to the first unit layout.