Signal transmission system with a clock signal generator configured for generating clock signal having stepwise/smooth frequency transition and related signal transmission method thereof

摘要

A signal transmission system (100, 1100) includes a first clock signal generator (122, 1122) and a second clock signal generator (112). The first clock signal generator (122, 1122) generates a first clock signal according to clock information derived from a transmitted signal, wherein the transmitted signal is changed in response to a frequency change of a second clock signal, and the first clock signal generator (122, 1122) enters a frequency-unlocked state if the second clock signal has a frequency transition from a first frequency to a second frequency during a first time period. The second clock signal generator (112) generates the second clock signal having the frequency transition from the first frequency to the second frequency during a second time period longer than the first time period such that the first clock signal generator (122, 1122) stays in a frequency-locked state during the second time period.