| 摘要 |
PURPOSE:To attain stable control from a high input level to a low input level by providing plural integration sections and constituting a gain coefficient multiplication section multiplying a gain coefficiency corresponding to each integration section into plural stages. CONSTITUTION:The switching control changing respectively gain coefficients C1, C2 and C3 is performed by a discrimination section 31. The integration section 4-1-4-3 have values of, e.g., +2, +2, -2 at present, then the gain coefficients C1, C2 and C3 take values of +2, +2 and +1. When an output of an error calculating section 3 has a further positive value in this state, the discrimination section 31 obtains a value of alpha3 by using an output of a slicer 32 and leads error information to the integration section 4-3. On the other hand, when the slicer 32 detects negative error information, the discrimination section 31 leads the error information to the integration section 4-2 by deciding the value of alpha2 so as to control the gain coefficient C2 to be changed. The switching control is performed similarly in other state. |
