Signal transmission system

Abstract

For signals to be transmitted through a signal transmission path constituted by a relay device group for relay for each set of a plurality of channels, a timing adjustment unit is provided in both or one of a receiver-side LSI and a transmitter-side LSI for each set of a plurality of channels transmitted through the relay device group for relay so that the signals can be transmitted with accurate timing. In addition, the timing adjustment unit can adjust the timing for signals transmitted through each relay device group, the timing in one receiver-side LSI in signal transmission through a plurality of relay device groups, and the timing in one-to-many signal transmission in which signals are transmitted from one transmitter-side LSI to a plurality of receiver-side LSIs.

1 . A signal transmission system comprising:
 a transmitter that transmits, for each one of a plurality of arrays, a plurality of transmission signals and a synchronization signal synchronous with the plurality of transmission signals;   a relay device for each of the plurality of arrays that relays the plurality of transmission signals and the synchronization signal of its respective array in parallel;   a receiver that receives the relayed transmission signals and the synchronization signal, wherein the receiver includes:
 a holding circuit for each of the plurality of arrays that holds the received plurality of transmission signals, of its respective array synchronously with a second synchronization signal of its respective array; and 
 a first timing adjustment unit that receives the synchronization signal and delays the received synchronization signal so that each holding circuit can hold the received plurality of transmission signals, the first timing adjustment unit outputs the respective second synchronization signals to the respective holding circuits, so that each of the plurality of transmission signals associated with the same array have the same transmission timing. 
   
     
     
         2 . A signal transmission system according to  claim 1 , wherein:
 the transmitter transmits a predetermined test pattern as the plurality of transmission signals;   the first timing adjustment unit of the receiver includes a memory that stores information regarding a received state of the received test pattern, and   the first timing adjustment unit adjusts an output timing of the second synchronization signal based on the information.   
     
     
         3 . A signal transmission system according to  claim 1 , wherein:
 the first timing adjustment unit includes:   a delay circuit that delays the received synchronization signal to generate delayed synchronization signals; and   a clock regenerating circuit that receives the delayed synchronization signals and outputs to the respective holding circuits clock signals regenerated from the delayed synchronization signals as the second synchronization signals.