| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage detecting circuit capable of temperature compensation with a simple circuit configuration and measuring voltages with high accuracy.SOLUTION: A voltage detecting circuit comprises control means 2 for measuring the voltage of an object of monitoring inputted to a detecting terminal 1 and determining whether or not this voltage is normal; a temperature compensator 4 provided with a first diode 3 connected between the detection terminal 1 and the control means 2 and a second diode 42 branched out of wiring between the first diode 3 and the control means 2 and provided with a prescribed resistance element 41, having a similar temperature characteristic to the first diode 3 and outputting a compensatory voltage to the control means 2; and memory means 5 connected to the control means 2 and storing in advance a compensatory coefficient. The control means 2 calculates the voltage at the detection terminal 1 on the basis of a detected voltage inputted via the first diode 3, the compensatory voltage from the temperature compensator 4 and the compensatory coefficient of the memory means. |
