The present invention can realize the monitoring alarm of clock signals or periodic pulse signals in various periods. When the present invention detects that the block is lost, ALM is output as an alarming output signal. The present invention adopts a stable monitoring clock (MCLK), a counter (A), two triggers (B) (C) and a comparator (D), wherein the counter (A) counts a monitored clock (CLK), the trigger (B) records the current state of the counter (A), the trigger (C) records the previous state of the counter (A), and the output values of the triggers (B) (C) are compared with the comparator (D). The present invention discloses a detection circuit for monitoring the pulse loss of a high frequency clock by a low frequency clock. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Xian Datang Telecom Co Ltd filed Critical Xian Datang Telecom Co Ltd Priority to CN 03134344 priority Critical patent/CN1202616C/en Publication of CN1474508A publication Critical patent/CN1474508A/en Application granted granted Critical Publication of CN1202616C publication Critical patent/CN1202616C/en Status Expired - Fee Related legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee Xian Datang Telecom Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 贾昊男 Current Assignee (The listed assignees may be inaccurate.
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number CN 03134344 Other languages Chinese ( zh)
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Google Patents High frequency clock pulse loss monitoring detection circuit with low frequency clockĭownload PDF Info Publication number CN1202616C CN1202616C CN 03134344 CN03134344A CN1202616C CN 1202616 C CN1202616 C CN 1202616C CN 03134344 CN03134344 CN 03134344 CN 03134344 A CN03134344 A CN 03134344A CN 1202616 C CN1202616 C CN 1202616C Authority CN China Prior art keywords clock counter trigger monitoring output Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents CN1202616C - High frequency clock pulse loss monitoring detection circuit with low frequency clock CN1202616C - High frequency clock pulse loss monitoring detection circuit with low frequency clock