Patent ID: 6768954
Filing Date: 2004-07-27
Classification: G01R,H04L

Abstract:
A jitter quantity calculator for calculating quantity of jitter of an output signal output from an electronic device, comprising:a timing generator for generating timing; a value calculating section for calculating a value of the output signal multiple times based on the timing generated by said timing generator; a first decision section for deciding whether the value of the output signal, which is calculated by said value calculating section multiple times, is greater than or equal to a first reference value, and for outputting the decision result; a second decision section for deciding whether the value of the output signal, which is calculated by said value calculating section multiple times, is greater than or equal to a second reference value, and for outputting the decision result; and a jitter calculating section including first calculation means for calculating the quantity of jitter of the output signal based on the number of times the value of the decision result of the output signal is less than the first reference value in the first decision section and the value of the output signal is greater than or equal to the second reference value in the second decision section, wherein said timing generator generates different timing whenever said value calculating section calculates the value of the output signal a predetermined number of times, and said first calculation means calculates the quantity of jitter of the output signal based on the number of the decision for each of the different timings.