Patent ID: 6617841
Filing Date: 2003-09-09
Classification: G06F

Abstract:
A method for circuit characterization comprising:injecting a plurality of known voltages into a circuit at a first test point; sending said plurality of known voltages to a positive input of a voltage subtractor; measuring a plurality of measured voltages across said first test point and a second test point having a common voltage; sending said plurality of measured voltages to a first output; sending said plurality of measured voltages to a negative input of said voltage subtractor; obtaining a plurality of differences between said plurality of known voltages and said plurality of measured voltages at said voltage subtractor; sending said plurality of differences to a second output; coupling said first and second outputs to an oscilloscope; plotting a graph of said plurality differences with respect to said plurality of measured voltages on said oscilloscope; and determining a characteristic of said circuit based on said graph.