光电耦合式音频功率放大器设计

Circuit Design of Photoelectrc Coupling Voice Frequency Power Amplifier

随着数码科技的快速发展,数字视听产品不断问世,对Hi-Fi器材中的重要一环———功率放大器的要求越来越高。由于电容耦合频率范围狭小,放音效果较差。本设计采用光电耦合器隔离耦合,利用其优良特性和BTL电路大功率输出优点设计的音频功率放大器,在400W的输出功率下,几乎能不失真地重放声音。

With the fast development of numeral science and technology, the emerging constantly of digital audio-visual products, to an important link in Hi-Fi apparatus —The request for the power amplifier is higher and higher. Because electric capacity coupling loud range narrow and small frequently, is it put sound result relatively poor to cause. The article puts forward the innovative thought on this question, use the photoelectrical coupler to isolate coupling, utilize the fine characteristic of the photoelectrical coupler and advantage of BTL circuit's great power output, under the output power of 400W, nearly replay the sound undistortedly.