| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable voltage-dividing circuit which changes voltage values at detection and release points in accordance with the change of a power source voltage without changing the width of hysteresis. SOLUTION: The variable voltage-dividing circuit includes: a voltage dividing part which comprises a resistor array having a plurality of resistors connected in series and has a first voltage applied to one end of the resistor array and has a second voltage applied to the other end and outputs divided voltages from connection points of respective resistors; a first constant current source connected to a first connection point of the resistor array; and a second constant current source connected to a second connection point of the resistor array, which is in a position symmetrical to the first connection point with respect to a center of the resistor array. One of the first constant current source and the second constant current source subtracts a first current for adjustment from a current flowing to the resistor array in accordance with a voltage difference between the first voltage and the second voltage, and the other supplies a second current for adjustment. COPYRIGHT: (C)2009,JPO&INPIT
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