| 摘要 |
PURPOSE:To realize a filter device, whose characteristic change with respect to temperature change is less, at a low cost. CONSTITUTION:An integrating circuit 54 is the first filter means, which electrically processes the input signal from a vehicle speed sensor 28 or the like. The change in constant of the integrating circuit 54 caused by temperature change is corrected by changing the constant of an integrating circuit 58, which is the second filter means, in response to the result of the detection of an ambient-temperature detector 25. In this way, the constant filtering time can be always obtained without using an expensive element having excellent temperature characteristic in the integrating circuit 54. |
