| 摘要 |
PURPOSE:To excellently approximate a function between specific input and output signals. CONSTITUTION:A control console 10 detects the position of a slider 30 arranged on the control console 10, and generates and inputs control data X in digital format of, for,example, 8 bits corresponding to the position to a digital/analog converting circuit 12, etc. The digital/analog converting circuit 12 generates a reference signal VREF corresponding to each specific range of the control data X. An offset compensating circuit 14 varies the value of the control data X by the specific ranges of the control data and inputs the varied data as a signal X' to a 2nd digital/analog converting circuit 16 to prevent a control voltage Vc from becoming discontinuous. A voltage-controlled amplifier 18 amplifies a speech input signal at an amplification factor Ac which is proportional to the control voltage Vc and outputs the amplified signal. |
