Abstract
The frequency modulation radio (FM Radio) has been occupying an important position in people life of amusement. From the transistor radio of old style to the network radio today, we can see that enjoying life though broadcast is the life style that people always like. Now, with the rise and prosperity of consumption electronic products and the development of numerical electronic products, the majority of the electronic products designers of the manufacture always imbed FM part in the products such as the MP3, intelligence cellular phone, easy take-away Video etc. But the traditional frequency modulated solution has many problems such as electric circuit physical volume too big and adjust frequency modulation inconvenient, the stability not so well etc. In order to resolve the above-mentioned problems, numerous semi-conductor companies look for the ASIC frequency modulation receiver to solve these problems. This thesis introduces the design and the realization of numerical frequency modulation high fidelity radio. It solves the problems of electric circuit physical volume too big and adjusts frequency modulation inconvenient, the stability not so well etc. This thesis mainly introduces the hardware electric circuit, software design process, testing system. The MCU of digital frequency modulation high fidelity radio adopts the single slice machine of AT89S52; and the single slice machine is the core spare part of this system. In this system radio mold piece TEA5767 is used to carry out frequency to receive, the LCD1602 to show time, frequency and volume, an iron electricity storage equipment of 24 C16 A to store frequency, TDA2822 to enlarge audio frequency power, and digital electric machine X9313 to modulate voice volume.
This design regulates frequency through a key, uses DS1302 solid hour to show time, and modifies the time though the key.