Frequency detection circuit and data processing ap

专利名称：Frequency detection circuit and data

processing apparatus

发明人：Shinya Shimasaki申请号：US10744788申请日：20031222公开号：US07134042B2公开日：20061107

专利附图：

摘要：A frequency detection circuit according to the present invention has a statusholding register for storing rise information and fall information about a check targetclock and outputting an error detection signal showing frequency abnormality when

information showing the next edge (a fall or a rise) from a rise or a fall of the checktarget clock is not stored, a rise/fall detection circuit for respectively detecting a rise anda fall of the check target clock and outputting a rise detection signal in response to therise and a fall detection signal in response to the fall, a sampling clock generation circuitfor generating sampling clock for storing the information about the check target clock,and an edge detection signal generation circuit for outputting an edge detection signalwhich is an edge detection result of the check target clock based on the rise detectionsignal and the fall detection signal.

申请人：Shinya Shimasaki

地址：Kanagawa JP

国籍：JP

代理机构：Ostrolenk, Faber, Gerb & Soffen, LLP

更多信息请下载全文后查看