Patent ID: 7574632

Claim:
A method for generating a time-stamp for a data signal or clock signal of a device under test, comprising: initiating a strobe with a time-stamp clock signal, wherein the strobe has a frequency greater than or equal to a frequency of at least one data signal or clock signal of the device under test; applying a time-stamp clock to delay circuitry wherein the delay circuitry comprises a series of delay elements; and providing a connection between each of the delay elements to receive a plurality of sequentially delayed copies of pulses in the time-stamp clock signal to generate the strobe; applying each pulse of the strobe to a corresponding latch of a plurality of latches, each corresponding pulse having a input signal; applying the data signal or clock signal of the device under test to the input signal of each of the latches; receiving the state of the data signal or clock signal of the device under test based on an output of each of the latches; and combining a time-stamp clock count with the time of at least one of the strobe pulses by adding the digital word representing the time of the at least one strobe pulses to the clock count.