US Patent 7323937 Variable-gain amplifier
Patent 7323937 was granted and assigned to Sony on January, 2008 by the United States Patent and Trademark Office.
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Patent Inventor Names
Koichi Ooya0
Tsuyoshi Sakuma0
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Patent abstract
A variable-gain amplifier has distortion characteristics (IIP3) improved when the gain is attenuated without impairing characteristics with respect to a gain PG and a noise figure NF when the gain is maximum. The variable-gain amplifier has a plurality of parallel-connected dual-gate FETs having first FETs (6), (8) having gates for being supplied with an input signal and second FETs (7), (9) connected in cascade to the first FETs (6), (8), respectively. Gate control voltages (Vcon1, Vcon2) can separately be applied to the second FETs (7), (9), respectively, from voltage control means.
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US Patent 07323937 Variable-gain amplifier US Patent 7323937 Variable-gain amplifier
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Patent Number
073239370
Patent Number
73239370
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Official Website
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Current Assignee
0
Patent Jurisdiction
Patent Number
073239370
Date of Patent
January 29, 2008
0Patent Application Number
105267580
Date Filed
September 10, 2003
0Official Website
Patent Primary Examiner
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US Patent 07323937 Variable-gain amplifier
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07323937
Date of patent
January 29, 2008
Patent application number
10526758
Date Filed
September 10, 2003
Patent primary examiner
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