What are the stages of an FM transmitter?
The first stage is the preamplifier stage where an audio input signal is amplified before modulation. This stage is served by Q1 (BC108). The second stage is the modulation stage in which amplified audio signal is modulated (superimposed to a carrier waver) for transmission. This stage is served by Q2 (2N2369).
What is FM transmitter and draw the block diagram?
FM transmitter is the whole unit, which takes the audio signal as an input and delivers FM wave to the antenna as an output to be transmitted. The block diagram of FM transmitter is shown in the following figure.
What is the bandwidth of FM signal?
However, in the case of FM, the amplitude of the modulated signal is kept or it remains constant. The frequency modulation index is mostly over 1 and it usually requires a high bandwidth at a range of 200 kHz. FM operates in a very high-frequency range normally between 88 to 108 Megahertz.
What are two methods for generating FM waves?
The following two methods generate WBFM wave.
- Direct method.
- Indirect method.
What is an FM transmitter circuit?
An FM transmitter circuit is a high frequency wireless device which is able to transmit voice signals into atmosphere so that it can be received by a corresponding FM receiver circuit for reproducing the voice signals in a loudspeaker.
What are the components of FM transistor?
The FM transistor consists of the oscillator to produce the RF signal. The following circuit diagram shows the FM transmitter circuit and the required electrical and electronic components for this circuit is the power supply of 9V, resistor, capacitor, trimmer capacitor, inductor, mic, transmitter, and antenna.
Can a USB transmitter be used for FM radio?
USB Here is a simple USB FM transmitter that could be used to play audio files from an MP3 player or computer on a standard VHF FM radio by connecting it to an USB port. The circuit use no coils that have to be wound. This USB transmitter can be used to listen to your own music throughout your home.
What is the function of the transmitter circuit?
The transmitter circuit is capable of storing the energy for the oscillation as it is a derived from the (inductor and capacitor) LC circuits. The audio I.e input signal obtained from the mic is passed through the base of the transistor in order to modulate the output signal of the LC circuit in FM (I.e frequency modulation wave) Form.