| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply voltage detection circuit capable of reducing the influence of a temperature even when it has an element having temperature characteristics.SOLUTION: A power supply voltage detection circuit includes a first voltage detection circuit for detecting the power supply voltage of a DC power source, and for, when the power supply voltage is less than a first threshold, turning off a switch circuit, and for, when the power supply voltage is not less than the first threshold, turning on the switch circuit. The power supply voltage detection circuit is a voltage detection circuit connected to the switch circuit, and configured to detect the output voltage of the switch circuit, and to output a signal for controlling the operation of a load circuit on the basis of the output voltage and the threshold. The power supply voltage detection circuit includes a second voltage detection circuit for, when the output voltage is less than a second threshold which is higher than the first threshold, outputting a signal for stopping the load circuit, and for, when the output voltage is not less than the second threshold, outputting a signal for starting the load circuit.SELECTED DRAWING: Figure 1 |
