| 摘要 |
PURPOSE:To reduce a carrier by constituting the titled multiplier so that even if a difference is generated in an output current, its difference is detected by a current detecting part, and corrected and corrected by a current correcting part. CONSTITUTION:To transistors Q1, Q2 for executing a differential amplification, an input signal Vin is supplied,and to each collector, output current I1, I2 flow. For instance, in case of I1>I2, a voltage drop portion of a resistance R1 becomes larger than a voltage drop portion of a resistance R2, a transistor Q11 of a current detecting part 2 operates to an ON state, and a current I3 increased. When the current I3 increases. When the current I3 increases, a suction quantity of the current I2 by a transistor Q14 of a current correcting part 3 becomes large, and the current I2 for driving the transistors Q6, Q7 of a multiplying part 1 is controlled so as to become large, and becomes the same current as the driving current I1 of the transistors Q4, Q5. In this state, the transistors Q4-Q7 to which a carrier signal f1 is supplied operate under the same condition, and a carrier leak is reduced. |
