| 摘要 |
PURPOSE:To provide an electronic equipment with a rotary angle detection function for detecting a rotary angle accurately. CONSTITUTION:The equipment is provided with an angular velocity sensor 1, an amplifier for amplifying the output, an A/D converter 5 for converting the amplified signal to a digital signal, and a microprocessor 6 for reading the A/D-converted digital data and for calculating a rotary angle by an integral calculation. The equipment is controlled by the calculation result, taking out a DC offset component from the input signal of the A/D converter 5 or the A/D-converted output digital signal, and performing a negative feed back to the amplifier 3 according to the value, thus performing a rotary angle operation at an accurate low-frequency region, securing the maximum dynamic range of the A/D converter 5, and hence accurately detecting a rotary angle. |
