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
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
举一反三
- 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
- Comparing with an analog signal assuming a continuous range of values, a digital signal assumes discrete values, usually two permitted values.
- what is an analog signal? A: Analog signal is a continous values B: Analog signal is a discrete values C: Analog signal is sometimes continous,sometimes discrete
- Analog signal is continuous
- The P-I characteristic of LED is linear, so no matter whether it is modulated by analog signal or digital signal, no bias current is required. A: 正确 B: 错误