Full-band intelligent and adjustable FM transmitter

Abstract

The invention discloses a full-band intelligent and adjustable FM transmitter. The full-band intelligent and adjustable FM transmitter comprises a battery, a 3.3V direct-current conversion module, an audio file input module, a voice input module, a BH1418 modulation module, a transmitting module, a power amplification module, a micro-processor and a LCD screen; the battery is connected to the 3.3V direct-current conversion module; the 3.3V direct-current conversion module is respectively connected to the audio file input module, the voice input module, the BH1418 modulation module, the transmitting module, the power amplification module, the micro-processor and the LCD screen; the audio file input module and the voice input module are respectively connected to the BH1418 modulation module; the BH1418 modulation module is connected to the power amplification module; the power amplification module is connected to the transmitting module; and the micro-processor is respectively connected to the LCD screen, the BH1418 modulation module and the power amplification module. According to the full-band intelligent and adjustable FM transmitter disclosed by the invention, frequency setting intellectualization, a controllable transmitting distance and a real-time voice input and transmitting function can be realized; due to use of a low-power-consumption processor MSP430 and a chip BH1418, the system power consumption is greatly reduced; and the system performance is improved.

Description

technical field [0001] The invention relates to the technical field of FM transmission, in particular to a full-band intelligent adjustable FM transmitter. Background technique [0002] The FM transmitter is also called a personal micro-broadcasting station, which can transmit portable audio and video voice signals through FM modulation, and then use a device with a radio function to receive it. Generally, the range of the FM transmitter is tens of meters to hundreds of meters, and the transmission frequency is adjustable. Before 1961, the simple monaural modulation technology was used in the world. It was not until 1961 that the US Federal Communications Commission (FCC) approved the broadcast of stereo channels, which applied the innovation of signal multiplexing to stereo audio. With the maturity of technology, FM transmitters are used more frequently in short-distance communication, which is closely related to its stable modulation performance and high-quality transmiss...

AI Technical Summary

Problems solved by technology

[0004] 1. The existing FM transmitter has a single modulation content and can only realize the modulation of some voice files

[0005] 2. The transmission frequency of the existing FM transmitter is unstable, and there is a problem of frequency drift

[0006] 3. The existing FM transmitters have few transmission frequencies, which are easy to overlap with other radio stations and cannot be used

[0007] 4. Existing FM transmitters consume a lot of power and are seriously wasted

[0008] 5. The transmission distance of the existing FM transmitter is uncontrollable, which is easy to cause waste of power and interference to others

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