A multi-chip synchronization system based on diversity technique

摘要

A multi-chip synchronization system based on diversity technique is presented. As diversity technique in communication, at the master IC chip's transmitter, two periodic synchronization signals (with a set delay time between them) have been sent as synchronization reference. At every IC chips' receiver end, a searching method (by internal state machine) is used to obtain the proper receiving clock for the two synchronization signals' reliable receiving, and the two received synchronization signals and an internal generated synchronization signal will be time aligned, only one of them is sent to reset the internal frequency divider. The two received synchronization signals are also monitored, and if any receiving error occurred, then the system will switch to use the other one or the internal one automatically. This multi-chip synchronization system can achieve a reliable multi-chip synchronization performance.