| 摘要 |
PURPOSE:To eliminate occurrence of the noise caused by the switching by giving gating to the signals after branching from the main track and at the same time minimizing the time constant by the current amplifying effect of the current control element. CONSTITUTION:The signal supplied to input terminal 1 passes through coupling capacitor to undergo the cut-off of the DC component. On the other hand, the position where the DC fixture is given to the signal at output terminal 9 is sampled by gate transistor Tr15 and then held by voltage holding capacitor 14. The voltage held by capacitor 14 drives current control Tr12, and the current is flowed to bias fixture resistances 10 and 11 to use the voltage drop caused by the current flowed as the bias for the output signal. With these feedback effects, the bias of the output is fixed at the fixed voltage. Thus the noise caused by the switching can be eliminated. |
