Jitter-free change-over method and device for main and stand-by units capable of being hot plugged and unplugged in digital communication system


Application Number: 00119461
Application Date: 2000.07.11
Publication Number: 1324148
Publication Date: 2001.11.28
Priority Information:
International: H04B1/74
Applicant(s) Name: Zhongxing Communication Co., Ltd., Shenzhen
Address:
Inventor(s) Name: Shen Aimin
Patent Agency Code: 00000
Patent Agent:
Abstract The apparatus consists of two non-flutter switching circuits which are on main chip and stand-by chip respectively, both of them include frequency lock circuit, phase lock circuit, switch controlling circuit and output buffer circuit. The main characteristic of the method is to transmit clock signal and data of the main chip after locking the frequency and phase, then to judge if there is an effective switch command or not. To transmit clock signals and data of original stand-by chip, cut off clock signals and data of original main chip and make original stand-by chip becoming main chip, the original main chip becoming stand-by chip as the effective switching command.