| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a logarithmic/anti-logarithmic converter circuit in which an output signal obtained when performing anti-logarithmic conversion can retain linearity without executing a temperature correction. <P>SOLUTION: The logarithmic/anti-logarithmic converter circuit is so configured that a current signal Iin passing through a current feedback transistor TR 2 of a logarithmic conversion circuit 1 is input in an anti-logarithmic converter circuit 2, a current/voltage converter circuit 3 convers the current signal Iin into a voltage value corresponding thereto, and a subtraction circuit 4 outputs a difference between the output voltage of the current/voltage converter circuit 3 and a preset reference voltage. The subtraction circuit 4 is configured to set a circuit constant such that the difference output has the linearity proportional to the current signal Iin. <P>COPYRIGHT: (C)2013,JPO&INPIT |
