What does a demodulator do?
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What does a demodulator do?
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.
Is detector and receiver same?
In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. Therefore, early radio receivers had only to distinguish between the presence or absence of a radio signal. The device that performed this function in the receiver circuit was called a detector.
What is the difference between modulator and demodulator?
Difference Between Modulation and Demodulation Modulation is the process of influencing data information on the carrier, while demodulation is the recovery of original information at the distant end of the carrier. A modem is an equipment that performs both modulation and demodulation.
What is the function of the detector demodulator in a receiver?
The AM diode detector is an envelope detector – it provides an output of the envelope of the signal. As such the diode detector or demodulator is able to provide an output proportional to the amplitude of the envelope of the amplitude modulated signal.
What demodulator is used for FM?
Quadrature Detectors
Quadrature Detectors The quadrature detector is probably the single most widely used FM demodulator. It uses a phase-shift circuit to produce a phase shift of 90° at the unmodulated carrier frequency. This detector is primarily used in TV demodulation and is used in some FM radio stations.
Why is it called synchronous detector?
In electronics, a synchronous detector is a device that recovers information from a modulated signal by mixing the signal with a replica of the un-modulated carrier. Synchronous detection preserves any phase information originally present in the modulating signal.
What’s another word for detector?
What is another word for detector?
| sensor | discoverer |
|---|---|
| gageUS | indicator |
| locater | pointer |
| radar | revealer |
| spotter | warner |
What is the difference between modulation and detection?
The key difference between modulation and demodulation is that modulation is done at the transmitter side while demodulation is done at the receiver side of a communication system. Modulation is basically done to transmit data to longer distance whereas demodulation is done to regain the original message signal.
What is meant by pulse modulation?
Pulse modulation is a type of modulation in which the signal is transmitted in the form of pulses. It can be used to transmit analogue information. In pulse modulation, continuous signals are sampled at regular intervals.
Why LPF is used in demodulator explain?
A LPF is used in order to remove the signal noise and improve the ratio SNR.
What is the difference between the foster Seeley discriminator and the ratio detector?
The ratio detector is a variant of the Foster–Seeley discriminator, but one diode conducts in an opposite direction, and using a tertiary winding in the preceding transformer. The ratio detector has wider bandwidth, but more distortion than the Foster–Seeley discriminator.
What is the difference between detection and demodulation?
The terms detection and demodulation are often used when referring to the overall demodulation process. Essentially the terms describe the same process, and the same circuits. As the name indicates the demodulation process is the opposite of modulation, where a signal such as an audio signal is applied to a carrier.
What is a radio demodulator circuit?
The demodulator is the circuit, or for a software defined radio, the software that is used to recover the information content from the overall incoming modulated signal. Detection or demodulation. The terms detection and demodulation are often used when referring to the overall demodulation process.
What is a synchronous detector or demodulator?
Synchronous detection: The synchronous detector or demodulator is effectively a development of the product detector circuit and it therefore provides the optimum performance for the demodulation of AM signals.
What is FM demodulation and how does it work?
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.