US 11,658,852 B2
Signal relay apparatus and method having frequency calibration mechanism
Chun-Chieh Chan, Hsinchu (TW); Tai-Jung Wu, Hsinchu (TW); and Chia-Hao Chang, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Jun. 24, 2022, as Appl. No. 17/848,761.
Claims priority of application No. 110129416 (TW), filed on Aug. 10, 2021.
Prior Publication US 2023/0046082 A1, Feb. 16, 2023
Int. Cl. H04L 25/24 (2006.01); H04L 25/02 (2006.01)
CPC H04L 25/242 (2013.01) [H04L 25/0272 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A signal relay apparatus having frequency calibration mechanism, comprising:
a clock generation circuit configured to generate a source clock signal;
a frequency generation circuit configured to receive the source clock signal and generate a target frequency signal according to a conversion parameter;
a clock measuring circuit configured to measure a first frequency offset of a source frequency of the source clock signal relative to a first predetermined frequency according to an external reference clock signal;
a frequency adjusting circuit configured to, when the first frequency offset is not within a first predetermined range, adjust the conversion parameter of the frequency generation circuit according to the first frequency offset such that a second frequency offset of a target frequency of the target frequency signal relative to a second predetermined frequency is within a second predetermined range; and
a transmission circuit configured to perform signal transmission according to the target frequency signal.