Patent ID: 7606675
Filing Date: 2009-10-20
Classification: G01R

Abstract:
1. A jitter frequency determining system, the system comprising: a comparator adapted to receive at least one output signal from a device under test and compare the output signal to an expected signal, wherein the output signal has a repeating pattern; a clock source adapted to produce a sampling clock based on user inputs, wherein the user inputs comprise a number of bits per one period of the repeating pattern, a length of a single bit period, a target effective sampling resolution and a number of times to sweep the repeating pattern, the clock source further adapted to change the time between locally-in-order strobes to adjust the measurement bandwidth, a latching circuit adapted to obtain sampled data of the output signal according to the sampling clock, a memory device adapted to store the sampled data; and a processor adapted to analyze the stored data to determine jitter, the processor further adapted to express jitter as a function of frequency.