Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroyasu Morikawa0
Marie Nishinaka0
Masamichi Katada0
Date of Patent
March 22, 2011
0Patent Application Number
121950590
Date Filed
August 20, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
The variable transconductance circuit includes: a voltage-current conversion circuit for outputting a current signal linear with an input voltage signal; first and second MOS transistors for converting the current signal received to a square-root compressed voltage signal; and third and fourth MOS transistors for converting the square-root compressed voltage signal to a linear current signal. A bias current at the first and second MOS transistors and a bias current at the third and fourth MOS transistors are varied to control transconductance.
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