FINGERPRINT SENSING SYSTEM WITH SENSING REFERENCE POTENTIAL PROVIDING CIRCUITRY
A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the...
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| creator | OLSSON, Allan SÄLL, Erik HJALMARSON, Emil SUNDBLAD, Rolf DE LANGEN, Klaas-Jan |
| description | A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement. |
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The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.</description><language>eng ; fre ; ger</language><subject>CALCULATING ; COMPUTING ; COUNTING ; ELECTRIC DIGITAL DATA PROCESSING ; PHYSICS</subject><creationdate>2019</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=20190227&DB=EPODOC&CC=EP&NR=3446254A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,781,886,25568,76551</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20190227&DB=EPODOC&CC=EP&NR=3446254A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OLSSON, Allan</creatorcontrib><creatorcontrib>SÄLL, Erik</creatorcontrib><creatorcontrib>HJALMARSON, Emil</creatorcontrib><creatorcontrib>SUNDBLAD, Rolf</creatorcontrib><creatorcontrib>DE LANGEN, Klaas-Jan</creatorcontrib><title>FINGERPRINT SENSING SYSTEM WITH SENSING REFERENCE POTENTIAL PROVIDING CIRCUITRY</title><description>A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. 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The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.</description><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2019</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPB38_Rzdw0KCPL0C1EIdvULBnIVgiODQ1x9FcI9QzzgYkGubq5Brn7OrgoB_iGufiGejj4KAUH-YZ4uIFlnzyDnUM-QoEgeBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnJqXWhLvGmBsYmJmZGriaGhMhBIARbgvHA</recordid><startdate>20190227</startdate><enddate>20190227</enddate><creator>OLSSON, Allan</creator><creator>SÄLL, Erik</creator><creator>HJALMARSON, Emil</creator><creator>SUNDBLAD, Rolf</creator><creator>DE LANGEN, Klaas-Jan</creator><scope>EVB</scope></search><sort><creationdate>20190227</creationdate><title>FINGERPRINT SENSING SYSTEM WITH SENSING REFERENCE POTENTIAL PROVIDING CIRCUITRY</title><author>OLSSON, Allan ; SÄLL, Erik ; HJALMARSON, Emil ; SUNDBLAD, Rolf ; DE LANGEN, Klaas-Jan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP3446254A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2019</creationdate><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>OLSSON, Allan</creatorcontrib><creatorcontrib>SÄLL, Erik</creatorcontrib><creatorcontrib>HJALMARSON, Emil</creatorcontrib><creatorcontrib>SUNDBLAD, Rolf</creatorcontrib><creatorcontrib>DE LANGEN, Klaas-Jan</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OLSSON, Allan</au><au>SÄLL, Erik</au><au>HJALMARSON, Emil</au><au>SUNDBLAD, Rolf</au><au>DE LANGEN, Klaas-Jan</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>FINGERPRINT SENSING SYSTEM WITH SENSING REFERENCE POTENTIAL PROVIDING CIRCUITRY</title><date>2019-02-27</date><risdate>2019</risdate><abstract>A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| title | FINGERPRINT SENSING SYSTEM WITH SENSING REFERENCE POTENTIAL PROVIDING CIRCUITRY |
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