| 摘要 |
PURPOSE:To prevent the overshoot of an output to a transient change of an input signal by detecting levels at an input terminal and applying this detection output to a part of a negative feedback loop. CONSTITUTION:The input signals is branched by a branching device 3 and sent to an integration circuit 8 and a comparison amplifier 9 after detection 5. The signal supplied to the circuit 8 rises up slowly and the amplified output is applied to one side of a comparison amplifier 13. Then the attenuation degree of a variable resistance attenuator 2 is gradually reduced. Thus the output rises up gradually up to a fixed level to cause no overshoot. In addition, a circuit is discharged at a high speed when no input signal exists any more by the synergism of the amplifier 9 and a discharge circuit 10. The amplifier 9 has the hysteresis characteristics with its threshold value. Thus no overshoot is produced when the next input signal is impressed. |
