| 摘要 |
Provided is a two-wire transmitter that is capable of obtaining a signal that reflects the continuous changes of a sensor signal, and of simplifying configuration and processing concerned with calculation at a subsequent step. The two-wire transmitter, which outputs an analog voltage signal (V3), on the basis of the sensor signal (V1), to a transmission path (N1), comprises an intermediate potential generating circuit (100) that generates an intermediate potential in between the potential of the transmission path (N1) and a transmission path (N2); an operational amplifier (101) to which the sensor signal (V1) and a feedback signal (V2) are supplied; and a current source (102) that generates a current (I3) that flows from the transmission path (N1) to the transmission path (N2), on the basis of a control signal outputted by the operational amplifier (101). In such a circumstance, the operational amplifier (101) controls the control signal such that the sensor signal (V1) becomes equal to the feedback signal (V2). |
