US 10,892,794 B1
Multi-channel transmission device
Yen-Chung T. Chen, Hsinchu (TW); Chia-Hsiang Chang, Hsinchu (TW); and Wen-Lung Tu, Hsinchu (TW)
Assigned to Global Unichip Corporation, Hsinchu (TW); and Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Global Unichip Corporation, Hsinchu (TW); and Taiwan Semiconductor Manufacturing Co., Ltd., Hsinchu (TW)
Filed on Feb. 6, 2020, as Appl. No. 16/784,196.
Int. Cl. H04B 1/00 (2006.01); H04B 1/7097 (2011.01)
CPC H04B 1/7097 (2013.01) 11 Claims
OG exemplary drawing
 
1. A multi-channel transmission device, comprising:
a clock generator, configurated to generate a plurality of input clocks; and
a plurality of transmitters, coupled to the clock generator, and configurated to operate based on a spread spectrum clock respectively, wherein each of the plurality of transmitters comprises:
a phase rotator, configurated to provide a selection signal and an interpolation signal of multiple bits, select two of the plurality of input clocks as a first selected input clock and a second selected input clock according to the selection signal, and generate a spread spectrum clock according to the interpolation signal, the first selected input clock and the second selected input clock,
wherein frequency offset ranges and spread spectrum periods of a plurality of spread spectrum clocks are different from each other, wherein the spread spectrum periods are change periods of frequency offsets of the spread spectrum clocks respectively.