How does a balanced modulator work?
How does a balanced modulator work?
In electronic communications, a balanced modulator is a circuit that produces double-sideband suppressed-carrier (DSBSC) signals: It suppresses the radio frequency carrier thus leaving the sum and difference frequencies at the output. This results in power saving during signal transmission.
What are the applications of balanced modulator?
These devices were designed for use where the output voltage is a product of an input voltage (signal) and a switching function (carrier). Typical applications include suppressed carrier and amplitude modulation, synchronous detection, FM detection, phase detection, and chopper applications.
What is balanced ring modulator?
Balanced Modulator [Ring Modulator] Balanced or ring modulation is a special type of amplitude modulation, where one bipolar (swinging both above and below 0 volts) signal – the modulator – is used to vary the amplitude of a second bipolar signal, known as the carrier.
Why balanced modulator is called balanced?
Balanced modulator consists of two identical AM modulators. These two modulators are arranged in a balanced configuration in order to suppress the carrier signal. Hence, it is called as Balanced modulator.
What are the two types of balanced modulator?
Types of balanced modulator: The suppression of carrier can be done using the following balanced modulators: Using the diode ring modulator or lattice modulator. Using the FET balanced modulator.
What are the components in a balanced modulation?
Balanced modulator consists of two identical AM modulators. These two modulators are arranged in a balanced configuration in order to suppress the carrier signal. Hence, it is called as Balanced modulator. The same carrier signal c(t)=Accos(2πfct) is applied as one of the inputs to these two AM modulators.
Why is SSB not used for broadcasting?
In addition, the occupied spectrum is less than half that of a full carrier AM signal. SSB reception requires frequency stability and selectivity well beyond that of inexpensive AM receivers which is why broadcasters have seldom used it.
How many balanced modulator is used in phase shift method?
Phase Shift Method for the SSB Generation This system uses two balanced modulators M1 and M2 and two 90o phase shifting networks as shown in fig. 1 .
What is a balanced modulator?
Following is the block diagram of the Balanced modulator. Balanced modulator consists of two identical AM modulators. These two modulators are arranged in a balanced configuration in order to suppress the carrier signal. Hence, it is called as Balanced modulator. ( 2 π f c t) is applied as one of the inputs to these two AM modulators.
What is a dsdsbsc modulator?
DSBSC modulators are also called as product modulators as they produce the output, which is the product of two input signals.
What is modulation and how does it work?
Modulation allows a small signal to control a larger signal. Communications systems transmit the modulated signal because the signal fits within the usable spectrum and power needed by the receiving circuit.
What is amplitude modulation (AM)?
We know that a circuit that handles amplitude modulation (AM) allows the information-laden signal to vary the amplitude of the carrier. Any non-linear circuit based on a diode, bipolar junction transistor, or a Junction Field Effect Transistor (JFET) can function as an amplitude modulator.
