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

A signal transmission method, comprising:

• generating 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 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;
• and
• generating 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 stays in a frequency-locked state during the second time period.

A signal transmission system, comprising:

• a first clock signal generator, configured for generating 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 enters a frequency-unlocked state if the second clock signal has a first frequency transition from one frequency to another frequency during a specific time period;
• and
• a second clock signal generator, configured for generating the second clock signal having a second frequency transition from one frequency to another frequency during the specific time period, wherein the second frequency transition is less than the first frequency transition such that the first clock signal generator stays in a frequency-locked state during the specific time period.

A signal transmission method, comprising:

• generating 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 enters a frequency-unlocked state if the second clock signal has a first frequency transition from one frequency to another frequency during a specific time period;
• and
• generating the second clock signal having a second frequency transition from one frequency to another frequency during the specific time period, wherein the second frequency transition is less than the first frequency transition such that the first clock signal stays in a frequency-locked state during the specific time period.