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

Published:2012/10/15 21:52:00 Author:Ecco | Keyword: Logarithmic, transformation function, I1 , I2 , positive, logarithmic amplifier | From:SeekIC

As shown in figure, it is the output logarithmic transformation function circuit with the signal I1 , I2 being positive and input with current form. When the inputs I1 and I2 flow to 4127's 4 feet and 2 feet as the direction shown in figure, they are positive current, the output voltage E0 = - A · log ( I1/I2 ), then output is converted into logarithmic form.



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