Switched current temperature sensor circuit with compounded DELTA VBE
A switched current temperature sensor circuit with compounded DELTA VBE includes an amplifier having an inverting input with a corresponding non-inverting output, and a non-inverting input with a corresponding inverting output; a first PN junction connected to the non-inverting input through a first...
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| creator | TUTHILL MICHAEL G |
| description | A switched current temperature sensor circuit with compounded DELTA VBE includes an amplifier having an inverting input with a corresponding non-inverting output, and a non-inverting input with a corresponding inverting output; a first PN junction connected to the non-inverting input through a first input capacitor and a second PN junction connected to the inverting input through a second input capacitor; a current supply including a low current source and a high current source; a switching device for applying in the auto zero mode the high current source to a first terminal of the first PN junction and the low current source to a first terminal of the second PN junction for providing the VBE1 of the first junction to the first capacitor and for providing the VBE2 of the second junction to the second capacitor and for applying in the temperature measurement mode the low current source to the first terminal of the first PN junction and the high current source to the first terminal of the second PN junction for providing the negative DELTA VBE1 of the first PN junction to the first capacitor and the positive DELTA VBE2 of the second PN junction to the second capacitor. The first feedback capacitor interconnected between the inverting output and non-inverting input and a second feedback capacitor interconnected between the non-inverting output and inverting input in the amplifier to define the gain on each of the DELTA VBE inputs to produce a differential voltage across the outputs representative of the average temperature of the PN junctions; and first and second reset switching devices for discharging the first and second feedback capacitors, respectively, and for enabling the amplifier to equalize its input in the auto-zero mode. |
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The first feedback capacitor interconnected between the inverting output and non-inverting input and a second feedback capacitor interconnected between the non-inverting output and inverting input in the amplifier to define the gain on each of the DELTA VBE inputs to produce a differential voltage across the outputs representative of the average temperature of the PN junctions; and first and second reset switching devices for discharging the first and second feedback capacitors, respectively, and for enabling the amplifier to equalize its input in the auto-zero mode.</description><edition>6</edition><language>eng</language><subject>BASIC ELECTRIC ELEMENTS ; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ; ELECTRICITY ; MEASURING ; MEASURING QUANTITY OF HEAT ; MEASURING TEMPERATURE ; PHYSICS ; SEMICONDUCTOR DEVICES ; TESTING ; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><creationdate>1999</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=19991109&DB=EPODOC&CC=US&NR=5982221A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25551,76302</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19991109&DB=EPODOC&CC=US&NR=5982221A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TUTHILL; MICHAEL G</creatorcontrib><title>Switched current temperature sensor circuit with compounded DELTA VBE</title><description>A switched current temperature sensor circuit with compounded DELTA VBE includes an amplifier having an inverting input with a corresponding non-inverting output, and a non-inverting input with a corresponding inverting output; a first PN junction connected to the non-inverting input through a first input capacitor and a second PN junction connected to the inverting input through a second input capacitor; a current supply including a low current source and a high current source; a switching device for applying in the auto zero mode the high current source to a first terminal of the first PN junction and the low current source to a first terminal of the second PN junction for providing the VBE1 of the first junction to the first capacitor and for providing the VBE2 of the second junction to the second capacitor and for applying in the temperature measurement mode the low current source to the first terminal of the first PN junction and the high current source to the first terminal of the second PN junction for providing the negative DELTA VBE1 of the first PN junction to the first capacitor and the positive DELTA VBE2 of the second PN junction to the second capacitor. The first feedback capacitor interconnected between the inverting output and non-inverting input and a second feedback capacitor interconnected between the non-inverting output and inverting input in the amplifier to define the gain on each of the DELTA VBE inputs to produce a differential voltage across the outputs representative of the average temperature of the PN junctions; and first and second reset switching devices for discharging the first and second feedback capacitors, respectively, and for enabling the amplifier to equalize its input in the auto-zero mode.</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR</subject><subject>ELECTRICITY</subject><subject>MEASURING</subject><subject>MEASURING QUANTITY OF HEAT</subject><subject>MEASURING TEMPERATURE</subject><subject>PHYSICS</subject><subject>SEMICONDUCTOR DEVICES</subject><subject>TESTING</subject><subject>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1999</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHANLs8sSc5ITVFILi0qSs0rUShJzS1ILUosKS1KVShOzSvOL1JIzixKLs0sUQAqzVBIzs8tyC_NSwFqcXH1CXFUCHNy5WFgTUvMKU7lhdLcDPJuriHOHrqpBfnxqcUFicmpeakl8aHBppYWRkZGho7GhFUAADIpMjo</recordid><startdate>19991109</startdate><enddate>19991109</enddate><creator>TUTHILL; MICHAEL G</creator><scope>EVB</scope></search><sort><creationdate>19991109</creationdate><title>Switched current temperature sensor circuit with compounded DELTA VBE</title><author>TUTHILL; MICHAEL G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US5982221A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1999</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR</topic><topic>ELECTRICITY</topic><topic>MEASURING</topic><topic>MEASURING QUANTITY OF HEAT</topic><topic>MEASURING TEMPERATURE</topic><topic>PHYSICS</topic><topic>SEMICONDUCTOR DEVICES</topic><topic>TESTING</topic><topic>THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR</topic><toplevel>online_resources</toplevel><creatorcontrib>TUTHILL; MICHAEL G</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>TUTHILL; MICHAEL G</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Switched current temperature sensor circuit with compounded DELTA VBE</title><date>1999-11-09</date><risdate>1999</risdate><abstract>A switched current temperature sensor circuit with compounded DELTA VBE includes an amplifier having an inverting input with a corresponding non-inverting output, and a non-inverting input with a corresponding inverting output; a first PN junction connected to the non-inverting input through a first input capacitor and a second PN junction connected to the inverting input through a second input capacitor; a current supply including a low current source and a high current source; a switching device for applying in the auto zero mode the high current source to a first terminal of the first PN junction and the low current source to a first terminal of the second PN junction for providing the VBE1 of the first junction to the first capacitor and for providing the VBE2 of the second junction to the second capacitor and for applying in the temperature measurement mode the low current source to the first terminal of the first PN junction and the high current source to the first terminal of the second PN junction for providing the negative DELTA VBE1 of the first PN junction to the first capacitor and the positive DELTA VBE2 of the second PN junction to the second capacitor. The first feedback capacitor interconnected between the inverting output and non-inverting input and a second feedback capacitor interconnected between the non-inverting output and inverting input in the amplifier to define the gain on each of the DELTA VBE inputs to produce a differential voltage across the outputs representative of the average temperature of the PN junctions; and first and second reset switching devices for discharging the first and second feedback capacitors, respectively, and for enabling the amplifier to equalize its input in the auto-zero mode.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS SEMICONDUCTOR DEVICES TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR |
| title | Switched current temperature sensor circuit with compounded DELTA VBE |
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