Patent ID: 7096144
Filing Date: 2006-08-22
Classification: G01R

Abstract:
1. A method for testing a group of periodic signals generated by at least one circuit in a semiconductor device operating under a system clock signal, comprising: (a) providing a selection signal for selecting a first one of the group of periodic signals; (b) providing a strobe signal, (c) capturing a state of the first periodic signal in response to the strobe signal; (d) generating an output signal that is associated with the captured periodic signal; (e) shifting the strobe signal in time relative to the system clock signal; (f) repeating steps (c), (d) and (e) using the time shifted strobe signal until a termination criterion is met; and (g) providing another selection signal for selecting a second one of the group of periodic signals and repeating steps (b), (c), (d), (e) and (f) using the second periodic signal.