扩音系统的设计与实现

Design and Implementation of the Amplifying System

本设计的扩音系统主要由前置电路、放大电路和音调电路构成.前置电路对输入的信号进行放大,音调电路用于实现对输入信号中一些高、低音的提升和衰减,放大电路决定整个电路的输出功率.结合功能需求,在对各模块电路展开分析与设计后采用proteus软件对电路进行仿真.实验表明,所设计的扩音系统能够实现音频放大、音调和音量调节等功能.

The sound amplifying circuit of this design is mainly composed of the preamplifier circuit,power amplifier circuit and tone control circuit. The preamplifier circuit amplifies the input signal,and the tone circuit is used to achieve the elevation and attenuation for some of the high and low tones in the input signal,and the power amplifier circuit determines the output power of all the circuit. According to the function requirement,the circuit is simulated by Proteus software after the analysis and design of each module circuit.Experiment shows that the designed amplifying system can achieve audio amplification,tone and volume adjustment and other functions.