| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase a resistance to a common mode input current component. <P>SOLUTION: In a differential transimpedance amplifier, a controlling amplifier 13 generates a control signal depending on a differential voltage between a common mode input voltage that is a combination of signals at respective input terminals IT, IC acquired in an input signal combination circuit 12 and a reference voltage that is a combination of signals at respective output terminals OT, OC acquired in an output signal combination circuit 15, and variable current sources IS1, IS2 draw an amount of current depending on the control signal from input current signals. The input signal combination circuit 12 comprises resistances R31-R33 and a capacitance C31. The output signal combination circuit 15 comprises resistances R41-R43 and a capacitance C41. <P>COPYRIGHT: (C)2013,JPO&INPIT |
