ANALOG CURRENT OUTPUT CIRCUIT FOR DETECTION SENSOR, AND DETECTION SENSOR PROVIDED WITH ALALOG CURRENT OUTPUT CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an analog current output circuit or the like for a detection sensor which contributes to size reduction and reliability improvement of a device, by suppressing the calorific value.;SOLUTION: The analog current output circuit, for outputting the signal of the detection sensor as an analog current, is provided with a voltage conversion means 64 provided with an output control terminal 64b and is capable of varying its output voltage, based on the input signal to be inputted to the control terminal 64b, a current detection means 66, connected in series with the conversion means 64 to detect a signal relating to the analog current value to be outputted in actuality, and a constant-current control circuit, to which the output signal of the detection sensor is inputted which gives via the control terminal 64b of the conversion means 64 a current output instruction value for producing a predetermined output, on the basis of the output signal of the detection sensor, and can adjust the current output instruction value to be inputted from the control terminal 64b, on the basis of the signal relating to the actual analog current value detected by the detection means 66.;COPYRIGHT: (C)2008,JPO&INPIT