Convert analog to digital and back to analog

1. Which converts analog to digital and digital to analog?
2. What are the 3 ways of conversion digital to analog?
3. How can I convert digital to analog?
4. Why do we need to convert digital back to analog?

Which converts analog to digital and digital to analog?

An ADC converts a continuous-time and continuous-amplitude analog signal to a discrete-time and discrete-amplitude digital signal. The conversion involves quantization of the input, so it necessarily introduces a small amount of error or noise.

What are the 3 ways of conversion digital to analog?

Any of the three characteristics can be altered in this way, giving us at least three mechanisms for modulating digital data into an analog signal: amplitude shift keying (ASK), frequency shift keying (FSK), and phase shift keying (PSK).

How can I convert digital to analog?

Digital to analog conversions can be performed using resistor networks and the conversion to an analog signal is usually in the order of nanoseconds. Since the digital information is a step approximation of the input signal, the resulting output from a D to A converter reflects this step nature of the signal.

Why do we need to convert digital back to analog?

Answer and Explanation: Digital to analog converters are needed because digital data can't be used to produce audio. Only analog signals are compatible with sound technology like speakers or headphones.