US Patent 7449670 Amplifier circuit and optical pickup device
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Patent abstract
An amplifier circuit according to the present invention includes: a first operational amplifier having a negative input terminal, a positive input terminal, and an output terminal; a photodiode connected to the negative input terminal; a first resistor inserted between the output terminal and the negative input terminal; and a second resistor inserted between the output terminal and the positive input terminal, in which the amplifier circuit outputs current from the output terminal via the second resistor.
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US Patent 07449670 Amplifier circuit and optical pickup device US Patent 7449670 Amplifier circuit and optical pickup device
Infobox
Patent Number
0744967000
Patent Number
744967000
Edits on 4 Apr, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074496700
Date of Patent
November 11, 2008
0Patent Application Number
116877150
Date Filed
March 19, 2007
0Official Website
Patent Primary Examiner
Edits on 23 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074496700
Date of Patent
November 11, 2008
0Patent Application Number
116877150
Date Filed
March 19, 2007
0Official Website
Patent Primary Examiner
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US Patent 07449670 Amplifier circuit and optical pickup device
Infobox
Is a
Patent jurisdiction
Patent number
07449670
Date of patent
November 11, 2008
Patent application number
11687715
Date Filed
March 19, 2007
Patent primary examiner
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