Magnetoresistive element input circuit
The present invention relates to a magnetoresistive element input circuit, and more particularly, to an input circuit or preamplifier of an integrated circuit for driving a magnetoresistive head. A magnetoresistive element input circuit includes a first resistor connected between a magnetoresistive...
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| creator | Kawai, Takumi |
| description | The present invention relates to a magnetoresistive element input circuit, and more particularly, to an input circuit or preamplifier of an integrated circuit for driving a magnetoresistive head.
A magnetoresistive element input circuit includes a first resistor connected between a magnetoresistive (MR) element and a first power source. A first current source is connected between the MR element and a second power source and supplies a DC bias current to the MR element in an active mode. A second resistor is connected between the MR element and the first current source. A capacitor is connected to a node between the second resistor and the first current source and to the first power supply. A differential amplifier is connected to the MR element. A voltage supply circuit is connected to the node and supplies the node with a voltage, when the input circuit is in an inactive mode, which is substantially equal to the voltage supplied to the node when the input circuit is in the active mode. |
| format | Patent |
| fullrecord | <record><control><sourceid>uspatents_EFH</sourceid><recordid>TN_cdi_uspatents_grants_06522491</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>06522491</sourcerecordid><originalsourceid>FETCH-uspatents_grants_065224913</originalsourceid><addsrcrecordid>eNrjZFDzTUzPSy3JL0otziwuySxLVUjNSc1NzStRyMwrKC1RSM4sSi7NLOFhYE1LzClO5YXS3AwKbq4hzh66pcUFiSVA5cXx6UWJIMrAzNTIyMTS0JgIJQCPVykL</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Magnetoresistive element input circuit</title><source>USPTO Issued Patents</source><creator>Kawai, Takumi</creator><creatorcontrib>Kawai, Takumi ; Fujitsu Limited</creatorcontrib><description>The present invention relates to a magnetoresistive element input circuit, and more particularly, to an input circuit or preamplifier of an integrated circuit for driving a magnetoresistive head.
A magnetoresistive element input circuit includes a first resistor connected between a magnetoresistive (MR) element and a first power source. A first current source is connected between the MR element and a second power source and supplies a DC bias current to the MR element in an active mode. A second resistor is connected between the MR element and the first current source. A capacitor is connected to a node between the second resistor and the first current source and to the first power supply. A differential amplifier is connected to the MR element. A voltage supply circuit is connected to the node and supplies the node with a voltage, when the input circuit is in an inactive mode, which is substantially equal to the voltage supplied to the node when the input circuit is in the active mode.</description><language>eng</language><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6522491$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,776,798,881,64015</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6522491$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Kawai, Takumi</creatorcontrib><creatorcontrib>Fujitsu Limited</creatorcontrib><title>Magnetoresistive element input circuit</title><description>The present invention relates to a magnetoresistive element input circuit, and more particularly, to an input circuit or preamplifier of an integrated circuit for driving a magnetoresistive head.
A magnetoresistive element input circuit includes a first resistor connected between a magnetoresistive (MR) element and a first power source. A first current source is connected between the MR element and a second power source and supplies a DC bias current to the MR element in an active mode. A second resistor is connected between the MR element and the first current source. A capacitor is connected to a node between the second resistor and the first current source and to the first power supply. A differential amplifier is connected to the MR element. A voltage supply circuit is connected to the node and supplies the node with a voltage, when the input circuit is in an inactive mode, which is substantially equal to the voltage supplied to the node when the input circuit is in the active mode.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZFDzTUzPSy3JL0otziwuySxLVUjNSc1NzStRyMwrKC1RSM4sSi7NLOFhYE1LzClO5YXS3AwKbq4hzh66pcUFiSVA5cXx6UWJIMrAzNTIyMTS0JgIJQCPVykL</recordid><startdate>20030218</startdate><enddate>20030218</enddate><creator>Kawai, Takumi</creator><scope>EFH</scope></search><sort><creationdate>20030218</creationdate><title>Magnetoresistive element input circuit</title><author>Kawai, Takumi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_065224913</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2003</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Kawai, Takumi</creatorcontrib><creatorcontrib>Fujitsu Limited</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Kawai, Takumi</au><aucorp>Fujitsu Limited</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Magnetoresistive element input circuit</title><date>2003-02-18</date><risdate>2003</risdate><abstract>The present invention relates to a magnetoresistive element input circuit, and more particularly, to an input circuit or preamplifier of an integrated circuit for driving a magnetoresistive head.
A magnetoresistive element input circuit includes a first resistor connected between a magnetoresistive (MR) element and a first power source. A first current source is connected between the MR element and a second power source and supplies a DC bias current to the MR element in an active mode. A second resistor is connected between the MR element and the first current source. A capacitor is connected to a node between the second resistor and the first current source and to the first power supply. A differential amplifier is connected to the MR element. A voltage supply circuit is connected to the node and supplies the node with a voltage, when the input circuit is in an inactive mode, which is substantially equal to the voltage supplied to the node when the input circuit is in the active mode.</abstract><oa>free_for_read</oa></addata></record> |
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| title | Magnetoresistive element input circuit |
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