Automatic frequency monitoring circuit, electronic device, automatic frequency monitoring method, and automatic frequency monitoring program
US8311169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Mar 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0079
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic frequency monitoring circuit automatically monitors a frequency of a clock related to an operation of a device to be monitored. In the automatic frequency monitoring circuit, a frequency detecting unit detects, upon detecting a predetermined momentum, the frequencies of a monitoring target clock during a predetermined time for a predetermined number of times and treats as a detection frequency of the monitoring target clock, an average of the frequencies that are detected for the predetermined number of times. A frequency monitoring unit monitors, upon the frequency detecting unit detecting the detection frequency of the monitoring target clock, whether the frequency of the monitoring target clock during the predetermined time is within a predetermined fluctuation range based on the detection frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.