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Oscillator circuit and oscillation control method
   
Document Number
US Patent 7317362
Issued Date
January 8, 2008
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Abstract
An oscillator circuit is disclosed that includes a first oscillation part configured to output a first oscillation output by charging and discharging a first capacitor, and a second oscillation part configured to output a second oscillation output by charging and discharging a second capacitor. The second oscillation part includes a phase difference detection part configured to detect the phase difference between the first oscillation output and the second oscillation output, and a charging current and discharge current control part configured to control the charging current and the discharge current of the second capacitor in accordance with the phase difference detected by the phase difference detection part so that the second oscillation output synchronizes with the first oscillation output.
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Number of Claims:
4
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Owner
Published
January 8, 2008
Application Number
11/313,134
Filed
December 20, 2005
US Classification
331/111   327/131 327/137 327/141 327/156 327/163 327/72 331/143 331/2 331/46 331/55
Int'l Classification
H03K   3/26   (20060101)  
Examiner
Attorney/Law Firm
Priority Data
Mar 15, 2005 [JP] 2005-073887
USPTO Field of Search
331/46   331/111   331/2   331/55   331/143   327/72   327/131   327/137   327/156   327/141   327/163  
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