摘要
D类功率放大器是一种相当成熟的宽频率功率低失真放大器件,直接用他构成当前大量使用的逆变电源核心电路,具有正弦波形失真低,电路结构简化,易于扩展设计等特点。使用现有技术成熟的成品器件有利于减少专用电源器件的开发和设计费用。通过对TDA7490的正弦逆变电源运用设计,尝试出一种利用D类开关音频器件设计低失真逆变电源的方法。
Class - D power amplifier is a comparatively mature amplifier with wide frequency power and low distortion. The kernel circuit with inverter power supply used widely currently composed of class - D power amplifier has advantages such as low sine wave aistortion, simplification of circuit configuration and facility to extending design. It is advantageous to reduce the expense of exploiting and designing the special power supply parts using technically mature finished product part. By designing TDA7490 sine wave inverter power supply,we educed a method to design an inverter power supply with low distortion by using class - D on - off audio part.
出处
《现代电子技术》
2007年第10期177-179,184,共4页
Modern Electronics Technique
