| 摘要 |
<p>PURPOSE:To improve the responsiveness to the characteristic of an object to be controlled by providing a control circuit where an initial value corresponding to the characteristic of the object to be controlled until a value to be controlled is within a certain range of a target value. CONSTITUTION:The output of a programmable read only memory PROM 29 is connected to a shift register 28, and the initial value corresponding to the characteristic of the object to be controlled is set by an initial value setting circuit 30, and this initial value is held until the value to be controlled of the object to be controlled is within a certain range of the target value by a control circuit 31. Consequently, the output of an adder 21 is zero and the output of an adder 26 is equal to the output of the shift register 28 and contents of the register 28 are changed to converge to the target value for the lock state when a servo loop is in the lock state, thus attaining a good transient response characteristic.</p> |
