Patent ID: 7957924
Filing Date: 2011-06-07
Classification: G01R,H03M

Abstract:
1. A method comprising: receiving, at a comparator, a first intermediate signal that is at least partially based upon a first reference signal; receiving, at the comparator, a second intermediate signal that is a time-shifted version of the first intermediate signal; generating, at the comparator, an output signal that is based upon the difference between the first intermediate signal and the second intermediate signal; determining, at a processor, an anticipated differential change in the output signal, the anticipated differential change to occur based upon a transition in the first reference signal; measuring, at the processor, a realized differential change in the output signal, the realized differential change occurring based upon a transition in the first reference signal; and comparing, at the processor, the realized differential change in the output signal to the anticipated differential change in the output signal to determine a nonlinearity indicator.