| 摘要 |
PURPOSE:To provide the coefficient interpolating circuit which can vary various control coefficient such as a filter coefficient by a certain inclination and also in a triangular wave shape by a constant amplitude and a constant period without decreasing the throughput of a CPU. CONSTITUTION:This coefficient interpolating circuit which generates a coefficient varying in steps of a certain division width from an initial value to a target value has a 1st storage means 3 and a 2nd storage means 2 which stores the initial value and targed value, a current value storage means 9 which stores the current value of the coefficient, a means 6 which sets the initial value in the current value storage means 9 at the time of starting of sound generation, arithmetic means 4 and 7 which vary the current value toward the target value, a switching means 5 which selectively supplies one of both the value stored in the 1st storage means 3 and the value stored in the 2nd storage means 2 as the target value, and control means 8 and 10 which detect the current value reaching the target value and switches the switching means. |
