| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve insertion detection precision of a power window control device. <P>SOLUTION: The power window control device is provided with a reference current generating circuit causing reference current proportional to current flowing in a drive motor (load L1) of a window to flow, an averaging circuit comprising a serial connection circuit of a resistor 1 and a capacitor C and averaging voltage of the reference current generating circuit at a prescribed point, a voltage dividing circuit (R3 and R4) dividing voltage of the reference current generating circuit at the prescribed point, and a comparator CMP1 comparing the voltage divided with the voltage dividing circuit with average voltage output from the averaging circuit. When the voltage divided with the voltage dividing circuit exceeds the average voltage, insertion of an obstruction is detected, when the voltage is turned on to the load L1, a resistor R2 of a smaller resistance value than that of a resistor R1 is controlled to be connected in parallel to the resistor R1 which the averaging circuit has. <P>COPYRIGHT: (C)2003,JPO |
