Patent ID: 7327302

Claim:
An asynchronous sampling arrangement comprising a first sampling gate responsive to an input time-varying waveform to form a sampled time-varying waveform; a second sampling gate responsive to an input trigger signal to form a sampled trigger signal having a trigger period T trig ; a strobe source for controlling the first and second sampling gates at a frequency f s ; a first analog-to-digital (A/D) converter coupled to the output of the first sampling gate to convert a set of analog samples from the input time-varying waveform into a digital representation thereof; a second analog-to-digital (A/D) converter coupled to the output of the second sampling gate to covert a set of analog samples from the input trigger signal into a set of digital trigger samples; a processor responsive to the set of trigger samples to determine therefrom a scanning step Δt, indicative of a change in sampling time between two consecutive samples relative to the trigger T trig ; and a time base module for establishing a time base t from the calculated Δt by establishing a time-stamp t i for each sample in the set of digital trigger samples using the relation t i =t i−1 +(M*T trig )+Δt, where M is an integer indicating the number of trigger periods that pass between two consecutive acquired samples the established time base t thereafter applied to the digital representation of the sampled signal waveform to form a reconstructed versions thereof.