| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a signal processing circuit that implements a simple and space saving circuit configuration.SOLUTION: A signal processing circuit 13a comprises: operational amplifiers 16a and 16b for performing arithmetic processing on the basis of a first reference voltage OP-Vref having a first voltage value based on a first ground potential OP-GND; an A/D converter 17 connected to outputs of the operational amplifiers 16a and 16b to perform arithmetic processing on the basis of a second reference voltage AD-Vref having a second voltage value different from the first voltage value based on a second ground potential AD-GND; and a ground potential adjustment section 18 connected to a terminal T3 of the A/D converter 17 into which the second reference voltage AD-Vref is input to adjust the second ground potential AD-GND such that the second voltage value becomes equal to the first voltage value.</p> |
