The analog signals must be converted to voltage signals suitable for conversion to digital form.

模拟信号须转换成适合于变换到数字形式的电压信号。

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The output signals may be resistance signals( resistance value can be set by yourself) or voltage signals.

输出信号有电阻信号（阻值可自定）、电压信号。

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A grounded source is one in which the voltage signals are referenced to a system ground, such as earth or building ground.

接地信号源的电压信号以系统地线作为参考点，比如建筑物或大地。

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The hard drive circuits translate those signals into to voltage fluctuations.

硬盘电路板把这些信号,转化为电压波动。

哈佛公开课 - 计算机科学课程节选

As eardrum vibrations naturally create a usable voltage from brain signals, the prototype can build enough charge in a capacitor to drive a very low-power wireless transmitter that relays the electrochemical properties of the ear and potentially diagnoses balance or hearing problems.

ENGADGET: MIT ear-powered wireless sensor sustains its charge through sound

Substations and transformer boxes eventually reduce the power to the 110 volts that toast your muffin in the morning, but the electrical noise on a high-voltage line can destroy data signals immediately.

FORBES: Magazine Article