What is the function of the VR1?
The VR1 controls the input level of the carrier signal. The low-pass filter constructed by C7, C9 and R9 is used to remove the third term, which is the second-order harmonic signal in the AM modulated signal.
How does amplitude modulation circuit work?
A better AM modulation circuit uses a transistor. In this circuit, the carrier-wave generated by an oscillator that isn’t shown in the circuit is applied to the base of a transistor. Then, the audio input is applied to the transistor’s emitter through a transformer.
What is amplitude modulation explain with diagram?
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio carrier wave. In amplitude modulation, the amplitude (signal strength) of the carrier wave is varied in proportion to that of the message signal, such as an audio signal.
What are the applications of modulation?
Uses of Modulation
- Grouping various signals with similar frequencies to transmit them over similar bandwidths.
- Amplification of base frequencies to improve the quality of transmission.
- Convert digital signals to analog and vice versa.
Where is FM used?
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing.
Which IC used in amplitude modulation?
An analog multiplier IC AD633 (Analog Devices) has been used to generate the AM signal.
What are the applications of sample and hold circuit?
Applications of Sample and Hold Circuit
- Analog to Digital Converter Circuits (ADC)
- Digital Interface Circuits.
- Operational Amplifiers.
- Analog De-multiplexers.
- Data distribution systems.
- Storage of outputs of multiplexers.
- Pulse Modulation Systems.
What is amplitude modulation example?
In amplitude modulation, the amplitude or strength of the carrier oscillations is varied. For example, in AM radio communication, a continuous wave radio-frequency signal (a sinusoidal carrier wave) has its amplitude modulated by an audio waveform before transmission.
Which of the following are the types of amplitude modulation?
Double sideband full carrier modulation: The message single obtained from the modulated signal must be below zero. The message signal is stored in the modulated signal. Quadrature amplitude modulation: Two different message signals are transmitted on the same frequency carrier but the phase shift will be different.
What kind of circuit is an amplitude modulator?
Amplitude modulator is a multiplier circuit. It multiplies the two input signals. IC MC1496 is used in conjunction with other passive circuit elements to serve this purpose. A detail theory on amplitude modulation followed by the modulator circuit is provided in the next subsections.
How to understand the theory of amplitude demodulation?
To understand the theory of amplitude demodulation. To design and implement the diode detection amplitude demodulation. To design and implement the product detection amplitude demodulator. Amplitude modulation is the variation of amplitude of the carrier signal in terms of message signal.
What kind of amplifier is used for demodulator?
An operational Amplifier (Op-Amp) is used to implement a demodulator circuit and an amplifier as an extension of the project. A power supply unit of ±5 volts and ±12 is constructed to drive all the circuits in this project.