The negative feedback will be the capacitor C2 to the oscillating tank circuit. If the current is passed at the inductor L1 and variable capacitor then the tank circuit will oscillate at the resonant carrier frequency of the FM modulation. The transistor used in this circuit is an NPN transistor used for general purpose amplification. The formation of the oscillating tank circuit can be done through the transistor of 2N3904 by using the inductor and variable capacitor. It produces according to the vibration to the change of air pressure and the AC signal. Let us consider the microphone to understand the sound signals and inside the mic, there is a presence of the capacitive sensor. 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. Block Diagram of FM Transmitter Working of FM Transmitter Circuit The FM transistor consists of the oscillator to produce the RF signal. The FM signal is obtained by differing the carrier frequency by allowing the AF. The audio frequency is used to modulate the carrier frequency. There are two frequencies in the FM signal, the first one is the carrier frequency and the other one is audio frequency. The following image shows the block diagram of the FM transmitter and the required components of the FM transmitter are microphone, audio pre-amplifier, modulator, oscillator, RF- amplifier, and antenna. Please follow the below link for: Know all About Power Amplifiers for FM Transmitter FM Transmitter Block Diagram of FM Transmitter The carrier wave frequency is equivalent to the audio signal of the amplitude and the FM transmitter produces a VHF band of 88 to 108MHZ. The FM transmitter is a low power transmitter and it uses FM waves for transmitting the sound, this transmitter transmits the audio signals through the carrier wave by the difference of frequency.

Bug no transistor no proteus 7