| 摘要 |
PURPOSE:To obtain an angle signal without a large error when an angular value corresponding to a rotary angle stored in a memory means is reset, by performing the reset only when said angular value is located between the upper limit value and the lower limit value. CONSTITUTION:High frequency noises of signals 1a-3a from an angle sensor 7 are cut off by low frequency filter circuits 14a-14c. Thereafter, a value corresponding to a rotary angle is computed, and stored in a memory device 10. A memory device 15 sets the upper limit value and the lower limit value corresponding to a specified angular range. When an input value is supplied to an input terminal which is connected to the output terminal of a reference signal 3a from the sensor 7, a comparing and judging device 16 performs comparison as to whether the stored value in the device 10 is in the range between the upper and lower limits or not. The value is reset only when it is located between the upper and lower limits. Since the circuits 14a-14c are provided, reset at the outside of the reference position is prevented, and the angle signal without a large error can be always obtained. |
