毕业设计小信号调频收音机电路设计.docVIP

小信号调频收音机的电路设计 摘要 单片机渗透到我们生活的各个领域飞机上仪表的控制，计算机的网络通讯传输，广泛使用的各种IC卡等，这些都离不开更不用说自动控制领域的智能机械了。更重要的意义是单片机的应用改变了控制系统传统的设计思想和方法。以前采用硬件电路实现的大部分控制功能，正在用单片机通过软件方法来实现。这种以软件结合硬件或取代硬件并能提高系统性能的控制技术称为微控制技术TEA5767芯片驱动诺基亚5110液晶显示实现FM收音并显示频率。TEA5767芯片，针对低电压应用的单芯片数字调谐FM立体声收音机芯片。TEA5767芯片内集成了完整的IF频率选择和鉴频系统，只需很少的低成本外围元件，就可实现FM收音机的全部功能。另外，它具有高性能的RF、AGC电路，其接收灵敏度高；参考频率选择灵活；可实现自动搜台。 关键词 ：单片机 FM收音机 TEA5767 Abstract Microcontroller penetrated into all areas of life, aircraft instrument control, communications and transmission of computer network, the widespread use of a variety of smart IC cards, which are inseparable from the microcontroller. Not to mention the field of automatic control of Intelligent Machines. More important is the application of SCM to change the design of the control system of traditional ideas and methods. Before most of the control functions, hardware circuit is with the microcontroller through the software method. This combination of hardware or software instead of hardware and can improve system performance control technology known as micro-control technology. For example, this article discusses the microcontroller to control TEA5767 chip driver Nokia 5110 LCD FM radio and display frequency. People often use radio to manual FM radio station, the process is cumbersome, and the receiver sensitivity is not high, narrow band received. This design uses TEA5767 chip, single-chip digital tuning FM stereo radio chip for low voltage applications. TEA5767 chip integrates a complete IF frequency selection and frequency discriminator system, only a few low-cost external components, you can achieve all of the features of the FM radio. In addition, it has a high-performance RF AGC circuit, which receives high sensitivity; flexible choice of the reference frequency; automatic station search. Keywords ：singlechip FM radio , TEA5767 目录 摘要 I Abstract II 目录 III 前言 1 1 FM收音机概述 2 1.1 发射系统的简单概述 2 1.2 接收系统的简单概述 2 1.3典型数字式收音机模块组成 3 1.4 收音机的调制方案简单介绍和该方案原理简单介绍 4 1.4.1 收音机的调制方案简单介绍 4 1.4