| 摘要 |
PURPOSE:To constitute a multiple amplification part without deteriorating reliability and power consumption by feeding back signals of the multiple amplification part together, comparing the addition output and a required amplification part output and performing relative operation with a correcting signal, and correcting the amplification part output. CONSTITUTION:The correcting signal from a control part 3 is received by an input resistance 8 and then compared with the sum of an operation signal to a controlled system 6 which is received by a feedback resistance 9 and output currents received by a feedback resistance 14 and voltage dividing resistances 15-17. An operational amplifier 10 performs the operation and then makes corrections as to a voltage/current converter 11 so as to reduce the difference between an operation signal and the correcting signal and the difference between the output currents and correcting signal. The output of the converter 11 flows through a current detection resistance 13 and the potential difference between both terminals is fed back to the amplifier 10 through resistances 14, and 15-17. The output of the converter 11, on the other hand, is summed up and the sum current flows through the system 6 and is reconverted into the voltage signal through a grounding resistance 12. Each amplification part 5 receives this voltage signal as a feedback signal and repeats correcting operation as well as potential differential feedback. Consequently, the partial output charge of each amplification part settles at an equal value with an equal input voltage. |
