Abstract: A method of implementing an engineering change order includes steps of: (a) receiving as input an integrated circuit design; (b) receiving as input an engineering change order to the integrated circuit design; (c) creating at least one window in the integrated circuit design that encloses a change to the integrated circuit design introduced by the engineering change order wherein the window is bounded by coordinates that define an area that is less than an entire area of the integrated circuit design; (d) performing a routing of the integrated circuit design that excludes routing of any net that is not enclosed by the window; (e) replacing an area in a copy of the integrated circuit design that is bounded by the coordinates of the window with results of the incremental routing to generate a revised integrated circuit design; and (f) generating as output the revised integrated circuit design.

Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a first output signal having a predetermined slew rate and propagation delay in response to a first input signal and a control signal. The second circuit may be configured to generate a second output signal having a predetermined slew rate and propagation delay in response to a second input signal and the control signal.