Can I change the preamp cathode or plate resistors to change the gain or tone of my amp?
通过改变前置放大级的阴极电阻或者屏极电阻，是不是就可以改变增益或者音色？
Any noise characteristic of the preamp circuit is attenuated along with the signal, unlike circuits where the volume control is before the input.
与一些音量控制置于输入端的电路不同，这个前级放大器的特征噪声能够随同信号一起衰减。
The CCD signal preamp with low pass filter is used to minimize the readout noise. The relationship between the readout noise and the readout speed is researched.
通过使用带低通滤波器的前置放大器降低了读出噪音，研究了读出噪音与读出速度的关系。
Placing the electrometer in the volts mode and then enabling external feedback switches the feedback circuit from an internal network to a feedback circuit connected to the preamp output.
将静电计置于电压模式，然后打开外部反馈，就把反馈电路从内部网络切换到连在前置放大器输出端的外部反馈网络上。
Placing the electrometer in the volts mode and then enabling external feedback switches the feedback circuit from an internal network to a feedback circuit connected to the preamp output.
将静电计置于电压模式，然后打开外部反馈，就把反馈电路从内部网络切换到连在前置放大器输出端的外部反馈网络上。
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