What does demodulator mean?

What does demodulator mean?

A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave. There are many types of modulation so there are many types of demodulators.

What is demodulation in signal processing?

Modulation and demodulation Modulation is the process of encoding information in a transmitted signal, while demodulation is the process of extracting information from the transmitted signal. Many factors influence how faithfully the extracted information replicates the original input information.

What is demodulator frequency?

Frequency demodulation is the inverse of frequency modulation. The original modulating signal is obtained as output following demodulation. After the signal has been received, filtered, and amplified, the original modulation from the carrier must be recovered. This is known as demodulation or detection.

How do you demodulate a signal?

An obvious way to demodulate a signal with a carrier and two equidistant sideband components is to use two lock-in amplifiers in series such that the first device demodulates at the carrier frequency with wide bandwidth and the second one demodulates at the sideband frequency.

Why do we need to demodulate the signals?

Need of demodulation The diaphragm of a telephone receiver or a loud speaker cannot vibrate with high frequency. Moreover, this frequency is beyond the audible range of human ear. So, it is necessary to separate the audio frequencies from radio- frequency carrier waves.

What is FREQUENCY MODULATION and demodulation?

Frequency Modulation Tutorial Includes: FM demodulation is a key process in the reception of a frequency modulated signal. Once the signal has been received, filtered and amplified, it is necessary to recover the original modulation from the carrier. It is this process that is called demodulation or detection.

How does a demodulator work?

The synchronous AM demodulator uses a mixer or product detector with a local oscillator signal. The local oscillator signal is synchronised to the incoming signal carrier so that it produces no beat note with the incoming carrier. The sidebands of the AM signal are then demodulated to provide the required audio signal.

What is the function of demodulator?

Demodulation. The process of separating the original information or SIGNAL from the MODULATED CARRIER. In the case of AMPLITUDE or FREQUENCY MODULATION it involves a device, called a demodulator or detector, which produces a signal corresponding to the instantaneous changes in amplitude or frequency, respectively.

Why demodulation is used?

A demodulator is an electronic circuit that is mainly used to recover the information content from the modulated carrier wave. There are different types of modulation, and so are demodulators. The output signal via a demodulator may describe the sound, images, or binary data.

Why do we need demodulation?

What is a modulator and demodulator?

A modulator is a device or circuit that performs modulation. A demodulator (sometimes detector) is a circuit that performs demodulation, the inverse of modulation. A modem (from modulator–demodulator), used in bidirectional communication, can perform both operations.

What is demodulation with example?

Demodulation is the act of extracting digital data from this signal once it reaches its destination. A common example of a demodulating device is a modem.

What is the use of demodulation?

What are the different types of demodulator?

There are different types of FM demodulators including:

• Slope Detector.
• Foster-Seeley Discriminator.
• Ratio Detector.
• Pulse-Averaging Discriminators.
• Quadrature Detectors.
• Phase-Locked Loops.

What are the types of demodulation?

Demodulation is the process of decoding the modulated signal into its original form. The three types of modulation are Amplitude, Frequency and Phase modulation.