| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an input selector flexibly adaptable to signals of various input forms.SOLUTION: A first selector SEL1 receives a second input signal SIG2 and a second reference voltage Vref2, and selects either one. A first buffer BUF1 receives an output signal of the first selector SEL1, and outputs the signal to the other end of a first resistor R1, and to 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 either one. A fourth selector SEL4 receives inputs of an output signal of an operational amplifier AMP1, a signal S2' that corresponds to an output signal S2 of the second selector SEL2, and a signal S3 that corresponds to the second input signal SIG2, and selects any of them.</p> |
