超星 - L12-句子词汇 - 查题吧

单选题

This section is an investigation of microphones , audio signals, and amplifiers, intended to develop your circuit design skills and giving you experience of using the oscilloscope to monitor signals in a circuit.

A. 音频信号
B. 放大器
C. 麦克风
D. 示波器

单选题

Microphone is a sensor that converts sound into an electrical signal. To get the microphone to work, you need to provide a voltage across it using a voltage divider circuit.

A. 声音信号
B. 电信号
C. 分压器电路
D. 传感器

单选题

Build the circuit on breadboard. Measure the voltage between the microphone by a multimeter .

A. 面包板
B. 万用表
C. 测量
D. 麦克风

单选题

Connect the oscilloscope test probe to the circuit. Adjust the setting properly until the shape of the signals is clear.

A. 示波器
B. 测试探头
C. 调整
D. 信号形状

单选题

Measure the peak-to-peak amplitude of the signal.

A. 测量
B. 信号
C. 峰峰值
D. 振幅

单选题

When you talk into the microphone, the signals you get are small. To make them bigger, you need an amplifier. One possible circuit is an operational amplifier circuit.

A. 运算放大器
B. 对着麦克风说话
C. 信号很小
D. 放大器

单选题

The minus sign appears because this is an inverting amplifier circuit, that is, the output waveform has the same shape as the input waveform, but is turned upside down, or inverted, compared with the input waveform.

A. 反相放大器
B. 输出波形
C. 负号出现
D. 上下颠倒

单选题

Monitor the input and the output of the system using the oscilloscope. Measure the peak-to-peak amplitude of the final output signal.

A. 示波器
B. 系统的输入和输出
C. 测量
D. 监测

单选题

Do your observations using the oscilloscope confirm the above theoretical analysis ?

A. 理论分析
B. 示波器
C. 证实
D. 观察结果

单选题

Work through your circuit using the oscilloscope to monitor the audio signal at different points in the circuit.

A. 示波器
B. 音频信号
C. 监测
D. 电路

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