Patent ID: 7957458
Filing Date: 2011-06-07
Classification: H04B

Abstract:
1. A jitter measuring apparatus for measuring timing jitter of a signal-under-test comprising: a pulse generator for receiving the signal-under-test and outputting a pulse signal of a predetermined pulse width for an edge of the signal-under-test, whose timing jitter is under test; a jitter measuring sub-unit for extracting the timing jitter on the basis of a duty ratio of each cycle of the signal output by said pulse generator; and an integrator for outputting a signal-for-measuring-jitter whose signal level increases by a predetermined increasing rate while the signal output by said pulse generator shows logic high, or H logic, and decreases by a predetermined decreasing rate while the signal output by said pulse generator shows logic low, or L logic, wherein said jitter measuring sub-unit extracts the timing jitter on the basis of the signal level which the signal-for-measuring-jitter shows at timing of each edge of the pulse signal.