What converts analog to digital signals
Answers
Answer:
An analog-to-digital converter, or ADC as it is more commonly called, is a device that converts analog signals into digital signals. Analog information is transmitted by modulating a continuous transmission signal by amplifying a signal's strength or varying its frequency to add or take away data.
How it is done ?
Analog signal is converted to a digital signal using a two step process.
Sampling
Quantization
The device used to do this is called as ADC (Analog to Digital Converter).
Step 1: Sampling converts a continuous time continuous amplitude (real valued) signal to discrete time continuous amplitude (still real valued) signal. Remember only time axis is discretized and not the amplitude axis.
Step 2: Quantization converts the discrete time continuous amplitude signal to discrete time and discrete valued (from a set of finite values, so that it can be represented by finite bits and can be stored on a computer).
Different sampling techniques and different quantization techniques is all together a big topic.