Logarithmic transformation function circuit with I1 being negative and I2 being positive( logarithmic amplifier 4127)

Published:2012/10/15 21:57:00 Author:Ecco | Keyword: Logarithmic, transformation function , I1 , negative , I2 , positive, logarithmic amplifier 4127 | From:SeekIC

As shown in figure, it is the output logarithmic transformation function circuit with the signal I1 being negative, I2 being positive and input with current form. When the input I1 flows to 4127's 7feet and I2 flows to 2 feet as the directionshown in figure,output voltage E0 = - A · log ( I1/I2 ), then output is converted into logarithmic form.



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