http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8514075-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a5d0d83b36376981ac1e16f7be54557b http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ccd957598ed806faac7c7307bb7be959 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02B20-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B47-13 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G08B13-1627 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05B47-115 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S15-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G08B13-08 |
| filingDate | 2011-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1fe62e34ae38aa1485ed7ffc2148ad0d |
| publicationDate | 2013-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-8514075-B1 |
| titleOfInvention | Ultrasonic receiving circuit |
| abstract | An ultrasonic occupancy sensor for detecting presence or absence of an occupant in a space includes an ultrasonic receiving circuit having a synchronous rectifier that allows the circuit to detect small-magnitude ultrasonic waves having a Doppler shift. The sensor comprises an ultrasonic transmitter for transmitting ultrasonic waves at an ultrasonic operating frequency, and a controller that drives the transmitting circuit with complementary drive signals to control the ultrasonic operating frequency. The synchronous rectifier receives the drive signals from the controller and rectifies an amplified input signal to generate a rectified signal, which is filtered by a filter to generate a filtered signal. The controller receives the filtered signal and determines that the space is occupied if the magnitude of the filtered signal exceeds a threshold. The ultrasonic occupancy sensor may also include a low phase-noise oscillator circuit coupled to the controller for setting an internal operating frequency of the controller. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9157898-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9671526-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9024760-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2014379305-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10054916-B2 |
| priorityDate | 2010-03-22-04:00^^<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/substance/SID447684039 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID90479729 |
Total number of triples: 24.