摘要 |
<P>PROBLEM TO BE SOLVED: To convert a small current signal to a big voltage signal even when a using temperature is high in a current conversion circuit of operation amplifier constitution. <P>SOLUTION: In the current conversion circuit of the operation amplifier constitution which converts current to voltage, a feedback circuit connected to the operation amplifier is composed of at least a feedback resister and a light-emitting diode. <P>COPYRIGHT: (C)2007,JPO&INPIT |