Temperature control circuit for central processing unit
The present invention relates to a temperature control circuit for central processing units (CPUs) used for personal computers. A CPU temperature control circuit is provided that can vary the clock frequency and the power source voltage of a central processing unit (CPU) while the CPU meets the oper...
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| creator | Moriyama, Shuichi |
| description | The present invention relates to a temperature control circuit for central processing units (CPUs) used for personal computers.
A CPU temperature control circuit is provided that can vary the clock frequency and the power source voltage of a central processing unit (CPU) while the CPU meets the operational specifications. The comparison circuit compares the temperature of the CPU measured by the CPU temperature sensor with temperature information previously stored in the ROM The CLK and power-source control circuit switches the clock frequency from a high frequency to a low frequency when the temperature of the CPU becomes high. Then, the CKL and power-source control circuit switches the power source voltage from a high voltage to a low voltage at the time the timer counts up. When the temperature of the CPU becomes low, the CLK and power-source control circuit switches the power source voltage from a low voltage to a high voltage. Then, the CLK and power-source control circuit switches the clock frequency from a low frequency to a high frequency at the time the timer counts up. |
| format | Patent |
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A CPU temperature control circuit is provided that can vary the clock frequency and the power source voltage of a central processing unit (CPU) while the CPU meets the operational specifications. The comparison circuit compares the temperature of the CPU measured by the CPU temperature sensor with temperature information previously stored in the ROM The CLK and power-source control circuit switches the clock frequency from a high frequency to a low frequency when the temperature of the CPU becomes high. Then, the CKL and power-source control circuit switches the power source voltage from a high voltage to a low voltage at the time the timer counts up. When the temperature of the CPU becomes low, the CLK and power-source control circuit switches the power source voltage from a low voltage to a high voltage. Then, the CLK and power-source control circuit switches the clock frequency from a low frequency to a high frequency at the time the timer counts up.</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/6510400$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,776,798,881,64012</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6510400$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Moriyama, Shuichi</creatorcontrib><creatorcontrib>NEC Corporation</creatorcontrib><title>Temperature control circuit for central processing unit</title><description>The present invention relates to a temperature control circuit for central processing units (CPUs) used for personal computers.
A CPU temperature control circuit is provided that can vary the clock frequency and the power source voltage of a central processing unit (CPU) while the CPU meets the operational specifications. The comparison circuit compares the temperature of the CPU measured by the CPU temperature sensor with temperature information previously stored in the ROM The CLK and power-source control circuit switches the clock frequency from a high frequency to a low frequency when the temperature of the CPU becomes high. Then, the CKL and power-source control circuit switches the power source voltage from a high voltage to a low voltage at the time the timer counts up. When the temperature of the CPU becomes low, the CLK and power-source control circuit switches the power source voltage from a low voltage to a high voltage. Then, the CLK and power-source control circuit switches the clock frequency from a low frequency to a high frequency at the time the timer counts up.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNrjZDAPSc0tSC1KLCktSlVIzs8rKcrPUUjOLEouzSxRSMsvUkhOBYol5igUFOUnpxYXZ-alK5TmZZbwMLCmJeYUp_JCaW4GBTfXEGcP3dLigsQSoJ7i-PSiRBBlYGZqaGBiYGBMhBIA7awvWw</recordid><startdate>20030121</startdate><enddate>20030121</enddate><creator>Moriyama, Shuichi</creator><scope>EFH</scope></search><sort><creationdate>20030121</creationdate><title>Temperature control circuit for central processing unit</title><author>Moriyama, Shuichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_065104003</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2003</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Moriyama, Shuichi</creatorcontrib><creatorcontrib>NEC Corporation</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Moriyama, Shuichi</au><aucorp>NEC Corporation</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Temperature control circuit for central processing unit</title><date>2003-01-21</date><risdate>2003</risdate><abstract>The present invention relates to a temperature control circuit for central processing units (CPUs) used for personal computers.
A CPU temperature control circuit is provided that can vary the clock frequency and the power source voltage of a central processing unit (CPU) while the CPU meets the operational specifications. The comparison circuit compares the temperature of the CPU measured by the CPU temperature sensor with temperature information previously stored in the ROM The CLK and power-source control circuit switches the clock frequency from a high frequency to a low frequency when the temperature of the CPU becomes high. Then, the CKL and power-source control circuit switches the power source voltage from a high voltage to a low voltage at the time the timer counts up. When the temperature of the CPU becomes low, the CLK and power-source control circuit switches the power source voltage from a low voltage to a high voltage. Then, the CLK and power-source control circuit switches the clock frequency from a low frequency to a high frequency at the time the timer counts up.</abstract><oa>free_for_read</oa></addata></record> |
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| source | USPTO Issued Patents |
| title | Temperature control circuit for central processing unit |
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