Projeto de um receptor super-heteródino FM (88-108 MHz)

Abstract

This study presents the design and simulation of a Modulated Frequency super-heterodyne receiver circuit operating in the 88–108 MHz frequency range. This technology remains widely used in various applications, ranging from broadcasting to vehicular communication systems. In this context, the project involves the application of analog electronics and radio frequency concepts in the calculation and development of each receiver stage. In summary, the objective is to design a circuit capable of processing the signal captured by the antenna, which is characterized by low amplitude and noise presence. The signal undergoes amplification and filtering, followed by frequency conversion to an intermediate frequency through the signal mixing process. Finally, the signal is demodulated to recover the original message. Additionally, a reference model for implementation in a printed circuit board was proposed, enabling future prototyping. The results obtained confirmed the feasibility of the project, demonstrating that the circuit successfully recovered the message signal.