Sensor circuit that converts detected change value from analog to digital value

摘要

A digital-to-analog converter 41, capable of setting a voltage V41 of an offset value using information JS. At the time of an offset correction operation, the voltage V41 of the offset signal is sequentially varied to automatically set it to a value that is extremely close to a lower executable conversion limit Vbottom within the convertible range of the analog-to-digital converter. With this structure it is possible to provide a sensor circuit that is capable of preventing lowered precision with temperature variations.