Method and apparatus for jitter analysis
AssigneeWavecrest Corporation
InventorsJan B. Wilstrup, Dennis M. Petrich
Life of this patent
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Abstract
A method, apparatus, and article of manufacture for separating the components of a jitter signal. The method includes the steps of obtaining measurements of the spans of a signal, generating variation measurements for each of the spans, transforming the variation estimates from a time domain to a frequency domain, and determining the random component and the periodic component of the jitter signal.
Claims17
A method of analyzing jitter in a signal having transitions which define spans over a time interval, the jitter having a random component and a periodic component, comprising the steps of:
- (a) obtaining a plurality of measurements for a plurality of spans;
- (b) generating variation estimates for the measurements for each of the spans;
- (c) transforming the variation estimates from a time domain to a frequency domain;
- and
- (d) determining the random component and the periodic component of the jitter signal.
A method of analyzing jitter in a signal having a repetitive data pattern comprising transitions which define spans over a time interval, the jitter having a random component and a periodic component, comprising steps of:
- (a) measuring a unit interval of the data pattern;
- (b) determining a matching pattern;
- (c) calculating a measurement schedule defining a measurement set for each span;
- (d) obtaining a plurality of measurements for a plurality of spans;
- (e) generating variation estimates for the measurements for each of the spans;
- (f) transforming the variation estimates from a time domain to a frequency domain;
- and
- (g) determining the random component and the periodic component of the signal.
An apparatus for analyzing jitter in a signal having a repetitive data pattern comprising transitions which define spans over a time interval, the jitter having a random component and a periodic component, the apparatus comprising:
- (a) a measurement apparatus for collecting data;
- (b) an analyzing unit, operatively connected to the measurement apparatus, for collecting data from the measurement apparatus, for measuring a unit interval of the data pattern, for determining a matching pattern, for calculating a measurement schedule defining a measurement set for each span, for obtaining a plurality of measurements for a plurality of spans, for generating variation estimates for the measurements for each of the spans, for transforming the variation estimates from a time domain to a frequency domain;
- and for determining the random component and the periodic component of the signal.
An article of manufacture comprising a program storage medium readable by a computer having a memory, the medium tangibly embodying one or more programs of instructions executable by the computer to perform method steps for analyzing jitter in a signal having a repetitive data pattern comprising transitions which define spans over a time interval, the jitter having a random component and a periodic component, the method comprising the steps of:
- (a) measuring a unit interval of the data pattern;
- (b) determining a matching pattern;
- (c) calculating a measurement schedule defining a measurement set for each span;
- (d) obtaining a plurality of measurements for a plurality of spans;
- (e) generating variation estimates for the measurements for each of the spans;
- (f) transforming the variation estimates from a time domain to a frequency domain;
- and
- (g) determining the random component and the periodic component of the signal.
Dependencies are inferred from the claim text.