| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reception circuit that can amplify a received signal including a signal on a negative signal level by means of an operational amplifier operated (acted) by a single positive power supply. <P>SOLUTION: A reception circuit 100 includes: a signal section 10 having a reference terminal 11 and a signal terminal 12 for outputting a received signal based on a voltage at the reference terminal 11; an operational amplifier 20 having a positive input terminal 21, a negative input terminal 22 and an output terminal 23, and operating on a voltage applied from a single positive power supply E2; a first load section 30 connected between the output terminal 23 and the negative input terminal 22; a second load section 40 connected between the signal terminal 12 and the negative input terminal 22; and a reference voltage section 50 including a diode 52 grounded on a cathode side and connected on an anode side to the reference terminal 11 and the positive input terminal 21. <P>COPYRIGHT: (C)2013,JPO&INPIT |
