本地时钟的英文
local clock
例句与用法
- Gps is a planet wireless conductance system which is global and all - weather , gps can offer high precision time orientation information to infinite user , clock precision reachs 10 ? 6 magnitude 。 not only changes traditional time method of quartz crystal clock , but also replaces wireless shortwave and even more lowfrequency signal and tv signal whose overlay range is limited and low precision , offers advantage to geology field task , achieve automatization and high precision of seismic flow observation
利用gps授时信号全方位、全天候、连续性、实时性和高精度的特点,以gps信号为基准来校准本地时钟(晶体振荡时钟或原子钟) ,将gps接收机输出信号的长期稳定度和恒温晶振的短期稳定度相结合,应用大规模可编程逻辑器件,设计和实现了由pc104控制的实时在线授时系统。 - The clock recovery block of usb2 . 0 transceiver macrocell consists of phase locked circuit , such as pll and dll ( delay locked loop ) . this block use external crystal 12mhz sin signal to produce 60mhz , 120mhz , 480mhz clock signal , and can recover colock signal form date wave . it can support 480mbps ( hs ) and 12mbps ( fs ) word speeds as defined in usb2 . 0 specification .
目的是用锁相环电路? pll和dll (延迟锁相环)实现usb2 . 0收发器宏单元utm的时钟恢复模块。其中pll环路构成的时钟发生器将外部晶振的12mhz正弦信号生成60mhz 、 120mhz 、 480mhz等本地时钟信号。 dll环路依据本地时钟信号对外部数据信号进行时钟恢复。
