| 摘要 |
PURPOSE:To relieve the load of the software handling a modulation control system by employing a multiplier provided with an interpolation circuit. CONSTITUTION:An interpolation circuit 2 consists of a latch circuit 3 latching a present value, a discrimination circuit 4 comparing the content of the latch circuit 3 with an object value (control data being an input of the interpolation circuit 2) and discriminating the quantity of an object with respect to the present value, and an adder circuit 5 making the present value close to the object (control data) and adding the result to the content of the latch circuit 3 based on the result of discrimination of the discrimination circuit 4. When the control data is rapidly changed, the change is traced gradually. As a result, a voice waveform being one input of a multiplier 1 is changed continuously regardless of a rapid change in the control data. Thus, the load of the software handling the modulation control system is relieved. |
