| 摘要 |
PURPOSE:To facilitate the desired correction of the frequency characteristic as a whole by connecting plural stages of basic circuits in cascade in which and output signal is obtained by adding or subtracting two signals generated through an amplifier having a specific frequency characteristic and a flat frequency characteristic. CONSTITUTION:A 1st signal VA is generated by supplying an input signal through the cascade connection circuit comprising a multiplier circuit 1 and an amplifier 3 having a specific frequency characteristic. The input signal is supplied to an amplifier having a flat frequency characteristic, from which a 2nd signal VB is generated. Plural stage of basic circuits each of which obtains an output signal by adding or subtracting the 1st and 2nd signals VA and VB (such as N stages of F1-FN) are connected in cascade. Then the coefficient multiplied with the multiplier circuit 1 and the specific frequency characteristic of the amplifier 3 in the circuits F1-FN are set to a prescribed value and characteristic. Thus, the correction to the desired frequency characteristic is attained easily as the entire circuits connected in cascade. |
