http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0878912-A3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4ddcb273a108a5d8472b335280098e06 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S331-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03L7-0992 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03L7-0814 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03L7-148 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03L7-095 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03L7-095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03D13-00 |
| filingDate | 1998-05-08^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0407be973c56ff0ce74abf8593697b88 |
| publicationDate | 1999-06-16^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0878912-A3 |
| titleOfInvention | Lock detector circuit for a phase locked loop |
| abstract | The invention relates to a snap-in detection circuit for a phase-locked loop consisting of two counters and a comparator device, which the counter readings of the two counters are performed. The snap-in detection circuit according to the invention is constructed symmetrically and has two comparator devices, in each of which the counter readings of the counters are checked separately. If the difference between the counter readings in one of the comparator devices exceeds a predefined threshold value, the phase-locked loop is immediately set to the non-locked state and the counter readings are reset to 0 again. The advantage of the snap-in detection circuit according to the invention is to immediately detect frequency differences without a time delay and regardless of the relative position of the reference edges of the signals to be compared and to control the phase-locked loop in a locked or unlocked state. Furthermore, the function of the snap-in detection circuit remains functional if one of the two coupled clocks fails, for example in the event of a quartz fracture. |
| priorityDate | 1997-05-15^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID24261 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID457707758 |
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