![]() ![]() Let us assume this value to be about 1mA. Since V CEO for this transistor is around 40V, we choose a much lesser Vcc, of about 9V.ī) Selection of Load Resistor, R4: To calculate the value of load resistor, we first need to calculate the quiescent collector current. Here we are designing a simple single stage common emitter amplifier as the pre-amplifier.Ī) Selection of Vcc: Here we have selected the NPN Bipolar Junction Transistor, BC109. ![]() Related Post: How TV Transmitter Circuit Works? Circuit Diagram of 2 km FM Transmitter Circuit: FM Transmitter Circuit Diagram – ElectronicsHub.Org Circuit Components:ģ0 Inches Long Wire or Telescopic AntennaįM Transmitter Circuit Design: Design of Audio Pre-amplifier: The power of the FM signal from the oscillator is then amplified using a power amplifier to produce a low impedance output, matching that with the antenna. The frequency is set at anywhere between the FM frequency range from 88MHz to 108MHz. The amplification is done by an amplifier, whereas the modulation and carrier signal generation is done by an variable frequency oscillator circuit. Here we have adapted the same formula by first amplifying the audio signal, generating a carrier signal using an oscillating and then modulating the carrier signal with the amplified audio signal.
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