模电课设《高保真全集成电路》..docVIP

PAGE 11 摘要 全集成电路高保真扩音机，是音响系统中最基本的设备，它的任务是把来自信号源（专业音响系统中则是来自调音台）的微弱电信号进行放大以驱动扬声器发出声音。 本次课程设计以高保真扩音机为设计对象，设计的主要内容包括全集成高保真扩音机的设计方案论证、全集成高保真扩音机各单元电路设计、全集成高保真扩音机整体电路设计。首先，根据整体电路参数的计算、设计的要求、技术指标选取2个功率放大器TDA2030A、1个TL084运算放大器，然后根据性能指标选取其他的电气设备，包括整流二极管、发光二级管、电解电容、电阻、电源变压器、喇叭座、电位器等。最后根据接线原则、性能指标以及技术指标设计前置放大、音调和音量、功率放大器和扬声器的电路图，选择可靠地接线方式，同时为了保证扩音机的高保真性以及降低信噪比安装了4个电位器。 作为音响系统中最基本的设备，本次全集成电路高保真扩音机设计改变了传统的设计和控制模式，能更好的适应电子技术、现代化工业生产和社会生活的发展趋势。 关键词：高保真扩音机；运算放大器；功率放大器；参数计算 Abstract The integrated circuit hi-fi amplifiers, is the fundamental equipment in the acoustic system, its task is to come from the signal source ( professional audio system is from the mixer ) the weak electrical signal is amplified to drive the speaker sound. This course is designed to hi-fi amplifiers as the design object, design the main contents include the integration of hi-fi amplifiers design scheme demonstration, fully integrated hi-fi amplifiers each unit circuit design, fully integrated hi-fi amplifiers integrated circuit design. First of all, according to the overall circuit parameter calculation, design requirements, technical indicators of the 2 power amplifier TDA2030A,1 TL084operational amplifier, and then according to the performance index of other electrical equipment, including a rectifier diode, two light-emitting tubes, electrolytic capacitors, resistors, power transformer, the horn base, such as potentiometers. Finally, according to the wiring principle, performance index and technical index design of preamplifier, tone and volume, a power amplifier and a loudspeaker circuit diagram, select reliable connection mode, at the same time in order to ensure the high fidelity amplifier and reducing the SNR installed a 4potentiometer. As the fundamental equipment in the acoustic system, the integrated circuit hi-fi amplifiers design changed the traditional design and control mode, to better adapt to the electronic technology, the modernization of industrial production and development trend of soci