Patent ID: 8713500
Filing Date: 2014-04-29
Classification: G06F

Abstract:
1. A non-transitory computer-readable storage medium storing a computer program for evaluating signal propagation delays in an electronic device including a plurality of circuit blocks, the computer program, when executed on a computer, causing the computer to perform a method comprising: determining whether first reference voltage levels used to define a first output slew rate of an output signal supplied from a first circuit block is different from second reference voltage levels used to define an input slew rate of an input signal supplied to a second circuit block from the first circuit block, the first reference voltage levels comprising a first start threshold voltage level and a first end threshold voltage level to determine a start point and an end point, respectively, of rising or falling edges of the output signal, the second reference voltage levels comprising a second start threshold voltage level and a second end threshold voltage level to determine a start point and an end point, respectively, of rising or falling edges of the input signal; and correcting the first output slew rate based on slew rate errors corresponding to the differences between the first reference voltage levels and the second reference voltage levels, wherein: the first start threshold voltage level and the first end threshold voltage level are higher than a minimum voltage level of the output signal and are lower than a maximum voltage level of the output signal; and the second start threshold voltage level and the second end threshold voltage level are higher than a minimum voltage level of the input signal and are lower than a maximum voltage level of the input signal.