A: Correct
B: Wrong
举一反三
- A sensor is a kind of device which can convert electrical signals into excitation signals. A: Correct B: Wrong
- Modem is only used to convert digital signals into analog signals and transmit them on the line.
- Modem is only used to convert digital signals into analog signals and transmit them on the line. A: 正确 B: 错误
- Audio card can convert analog audio signals to digital form which can be stored as a computer audio file.
- Analog signals are characterized by continuous electrical signals in both time and value. A: Correct B: Wrong
内容
- 0
Digital signals are characterized by continuous electrical signals in both time and value. A: Correct B: Wrong
- 1
The A/D converter is used to convert the analog signals to digital signals. For an 8-bit A/D converter with a conversion speed of 1 ms and an analog input range of 0-5V, if a 3.3V analog signal is inputted, the digital signal output should be: A: 168 B: 3.3 C: 168.9 D: 3
- 2
4. What are the advantages of digital signals, comparedwith analog signals?
- 3
Generally speaking, digital transmission can get higher signal quality than analog transmission, because? A: The repeater can regenerate digital pulses to remove signal distortion, and the amplifier amplifies the analog signal as well as the analog signal distorted B: Digital signals are smaller than analog signals and are not prone to distortion C: Analog signals are continuous and are not prone to distortion D: Digital signal is easier to sample than analog signal
- 4
The module responsible for converting analog signals to digital signals is called________. A: BME280 B: CCS811 C: MQ-5 D: ADC