What is the balanced modulator?

A balanced modulator is a circuit that generates a DSB signal, suppressing the carrier and leaving only the sum and difference frequencies at the output. The term 'Balanced' represents suppressed carrier AM modulated signal. Double side band suppressed carrier modulation is simply AM without the broadcast carrier.

Simply so, what is a balanced modulator an example of?

A balanced modulator mixes the audio signal and the radio frequency carrier, but suppresses the carrier, leaving only the sidebands. The output from the balanced modulator is a double sideband suppressed carrier signal and it contains all the information that the AM signal has, but without the carrier.

Also, what are the applications of balanced modulator? Typical applications include suppressed carrier and amplitude modulation, synchronous detection, FM detection, phase detection, and chopper applications.

Keeping this in view, what is the difference between a balanced modulator and a regular modulator?

In a balanced modulator, there is 180º phase shift between the upper and lower sidebands. c. In a balanced modulator, only one sideband is produced. In a balanced modulator, harmonics of the sidebands are suppressed.

What is product modulator?

kt ‚mäj·?‚lād·?r] (electronics) Modulator whose modulated output is substantially equal to the carrier and the modulating wave; the term implies a device in which intermodulation between components of the modulating wave does not occur.

27 Related Question Answers Found

What are the advantages of ring modulator?

A particular elegance of the ring modulator is that it is bidirectional: the signal flow can be reversed allowing the same circuit with the same carrier to be used either as a modulator or demodulator, for example in low-cost radio transceivers.

What do you mean by modulation?

Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform -- constant height, or amplitude, and frequency.

How does a ring modulator work?

A ring modulator multiplies two signals together to create two brand-new frequencies which are the sum and difference of the input frequencies. Your VCA lets one signal through when another signal is present. In effect it is multiplying the first signal by the second signal.

Why am is used for broadcasting?

Why is amplitude modulation used for broadcasting? Simple demodulation scheme compared to other modulation,hence makes demodulator simple and cheap. AM can be transmit signal over a wide range of area. Single Side band are used in High frequency communication links .

What are the advantages of suppressing the carrier?

Furthermore, the suppression of the carrier leads to improve important characteristics of the fiber optic link such as dynamic range and noise figure. A direct way to increase dynamic range in fiber optic links is to increase the optical power at the detection stage.

What is meant by angle modulation?

Angle modulation is a class of carrier modulation that is used in telecommunications transmission systems. The class comprises frequency modulation (FM) and phase modulation (PM), and is based on altering the frequency or the phase, respectively, of a carrier signal to encode the message signal.

What is switching modulator?

Switching modulator is similar to the square law modulator. The only difference is that in the square law modulator, the diode is operated in a non-linear mode, whereas, in the switching modulator, the diode has to operate as an ideal switch.

What is a double balanced mixer?

Double Balanced Mixer. The double balanced mixer is a diode bridge mixer that uses two single-ended to differential transformers, or baluns, to create the multiplication of two input frequencies and cancel many of the unwanted harmonics and signals.

Why balanced modulator is called balanced?

Balanced modulator is a modulator in which the carrier and modulating signal are introduced in such a way that the output contains the two sidebands without the carrier. The term 'Balanced' represents suppressed carrier AM modulated signal. A band pass filter can be used to select any one of the AM signals.

What are the two ways of generating Dsb_sc?

The DSB-SC can be generated using either the balanced modulator or the 'ring-modulator'. The balanced modulator uses two identical AM generators along with an adder. The two amplitude modulators have a common carrier with one of them modulating the input message , and the other modulating the inverted message .

How can you obtain a DSB SC signal?

Generation. DSB-SC is generated by a mixer. This consists of a message signal multiplied by a carrier signal. The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used.

Why is SSB not used for broadcasting?

Vestigial –Sideband (VSB) Modulation ? In VSB modulation, only a portion of one sideband reduces the required bandwidth from that required for DSB but does not match the spectrum efficiency of SSB. The resulting signal is called vestigial-sideband (VSB) AM. resulting signal is called vestigial-sideband (VSB) AM.

What are the advantages of DSB SC?

Simplicity of modulation and demodulation is indeed the chief advantage of DSB-AM -- a DSB-AM signal can use a low level modulator and Class C amps or a high-level final stage modulator with Class C carrier drive, whereas a SSB or DSB-SC signal must be generated low-level with a doubly balanced modulator and amplified

What is Dsbsc wave?

Double Sideband Suppressed Carrier (DSBSC) is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier. Thus to increase the efficiency and to save power, the carrier is suppressed in DSBSC system.

What is SSB SC?

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently.

What is the function of modulator?

So a modulator is a device capable of modulate a carrier using a signal to be sent. The aim of this is to transmit many different channels on air: each has a different frequency of the carrier and each is modulated to send a different audio signal.

What are the problems of product detection technique?

Drawbacks of the simple product detector

Although this simple detector works, it has two major drawbacks: The frequency of the local oscillator must be the same as the frequency of the carrier, or else the output message will fade in and out in the case of AM, or be frequency shifted in the case of SSB.