| 摘要 |
PURPOSE:To form a distortion correcting circuit for a noninverting amplifier by using two amplifiers, an input drive amplifier generating an output including distortion and a distortion correction control amplifier cancelling the distortion. CONSTITUTION:The noninverting voltage amplifier with a voltage amplification factor of (1+R2/R1) is formed by the input drive amplifier 6 and the distortion correction control amplifier 3. An output voltage of the amplifier is divided into a ratio of R3/(R3+R4) by using resistors R3, R4. Further, the input voltage of the amplifier is divided into a ratio of R6/(R5+R6) by using resistors R5, R6. Then the control amplifier 3 controls a current flowing in the resistor R1 so that the voltage with the ratio of R3/(R3+R4) and the voltage with the ratio of R6/(R5+R6) are made equal. Thus, the distortion is corrected. Then the distortion correcting circuit for the noninverting amplifier is formed. |
