What is the difference between analog and digital signals? Give examples of each. Which device would you use to convert one into the other?
Answers
Answer:
Example Analog Signals
Video and audio transmissions are often transferred or recorded using analog signals. The composite video coming out of an old RCA jack, for example, is a coded analog signal usually ranging between 0 and 1.073V. Tiny changes in the signal have a huge effect on the color or location of the video.
Example Digital Signals
Not all audio and video signals are analog. Standardized signals like HDMI for video (and audio) and MIDI, I2S, or AC'97 for audio are all digitally transmitted.
Most communication between integrated circuits is digital. Interfaces like serial, I2C, and SPI all transmit data via a coded sequence of square waves.
Devices that convert analog signals to digital are frequently referred to as ADC. Devices that convert digital signals to analog are called DAC.
