Device and method for measuring jitter in phase locked loops

Details Device and method for measuring jitter in phase locked loops Device and method for measuring jitter in phase locked loops

2005-02-22

2005-02-22

Le, N. (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

C324S076520, C702S069000

Reexamination Certificate

active

06859027

ABSTRACT:
A device and method for measuring the jitters of phase locked loop signals. A phase lead or phase lag relationship between an input signal and an output signal of a phase locked loop is found. According to the phase relationship and using multiplexers, a first phase difference signal and a second phase difference signal are re-routed to a subtraction unit and produces a jitter-level output signal. The jitter-level output signal represents the absolute value of the difference of pulse width between the first phase difference signal and the second phase difference signal.

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