Current zero-crossing detection circuit
The utility model relates to the technical field of detection circuits, and particularly discloses a current zero-crossing detection circuit, which comprises a sampling circuit, a waveform conversioncircuit and a comparison circuit. The sampling circuit is connected with the alternating current sign...
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| creator | SHEN JIAQIN WU GUANGLIE |
| description | The utility model relates to the technical field of detection circuits, and particularly discloses a current zero-crossing detection circuit, which comprises a sampling circuit, a waveform conversioncircuit and a comparison circuit. The sampling circuit is connected with the alternating current signal input end and used for converting the collected current signal into a voltage signal, and the voltage signal is a sine wave signal; the waveform conversion circuit is connected with the output end of the sampling circuit and is used for converting the sine wave signal into a sharp pulse signal;and the comparison circuit is connected with the output end of the waveform conversion circuit and is used for carrying out zero-crossing detection on the sharp pulse signal according to the referencecomparison voltage and outputting a square wave signal. The waveform conversion circuit is arranged so that the sine wave signal can be converted into the sharp pulse signal, and the accuracy of subsequent zero-crossing switch |
| format | Patent |
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The sampling circuit is connected with the alternating current signal input end and used for converting the collected current signal into a voltage signal, and the voltage signal is a sine wave signal; the waveform conversion circuit is connected with the output end of the sampling circuit and is used for converting the sine wave signal into a sharp pulse signal;and the comparison circuit is connected with the output end of the waveform conversion circuit and is used for carrying out zero-crossing detection on the sharp pulse signal according to the referencecomparison voltage and outputting a square wave signal. The waveform conversion circuit is arranged so that the sine wave signal can be converted into the sharp pulse signal, and the accuracy of subsequent zero-crossing switch</description><language>chi ; eng</language><subject>MEASURING ; MEASURING ELECTRIC VARIABLES ; MEASURING MAGNETIC VARIABLES ; PHYSICS ; TESTING</subject><creationdate>2020</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201124&DB=EPODOC&CC=CN&NR=212008738U$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25551,76302</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201124&DB=EPODOC&CC=CN&NR=212008738U$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SHEN JIAQIN</creatorcontrib><creatorcontrib>WU GUANGLIE</creatorcontrib><title>Current zero-crossing detection circuit</title><description>The utility model relates to the technical field of detection circuits, and particularly discloses a current zero-crossing detection circuit, which comprises a sampling circuit, a waveform conversioncircuit and a comparison circuit. The sampling circuit is connected with the alternating current signal input end and used for converting the collected current signal into a voltage signal, and the voltage signal is a sine wave signal; the waveform conversion circuit is connected with the output end of the sampling circuit and is used for converting the sine wave signal into a sharp pulse signal;and the comparison circuit is connected with the output end of the waveform conversion circuit and is used for carrying out zero-crossing detection on the sharp pulse signal according to the referencecomparison voltage and outputting a square wave signal. 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The sampling circuit is connected with the alternating current signal input end and used for converting the collected current signal into a voltage signal, and the voltage signal is a sine wave signal; the waveform conversion circuit is connected with the output end of the sampling circuit and is used for converting the sine wave signal into a sharp pulse signal;and the comparison circuit is connected with the output end of the waveform conversion circuit and is used for carrying out zero-crossing detection on the sharp pulse signal according to the referencecomparison voltage and outputting a square wave signal. The waveform conversion circuit is arranged so that the sine wave signal can be converted into the sharp pulse signal, and the accuracy of subsequent zero-crossing switch</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING |
| title | Current zero-crossing detection circuit |
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