| 摘要 |
PROBLEM TO BE SOLVED: To provide an input selector flexibly adaptable to signals having various input formats.SOLUTION: A first selector SEL1 receives a second input signal SIG2 and a second reference voltage Vref2, and selects any one of them. A first buffer BUF1 receives an output signal of the first selector SEL1, and outputs the output signal to the other end of a first resistor R1 and the other end of a third resistor R3. A second selector SEL2 receives a first input signal SIG1 and a third input signal SIG3, and selects any one of them. A fourth selector SEL4 receives an output signal of an operational amplifier AMP1, a signal S2' according to an output signal S2 of the second selector SEL2, and a signal S3 according to the second input signal SIG2, and selects any one of them. |
