基于单片机及FPGA的高效率、低失真D类功放设计  

D amplifier design on high efficiency and low distortion of MCU and FPGA

作　　者：吴兴波[1] 关文翠[2] 贾彬彬[1] 

机构地区：[1]吉林化工学院信息与控制工程学院,吉林吉林132022 [2]北华大学物理学院,吉林吉林132011

出　　处：《吉林化工学院学报》2012年第5期69-72,共4页Journal of Jilin Institute of Chemical Technology

摘　　要：提出了基于单片机及FPGA控制的高效率、低失真的D类功放设计.首先,单片机对声音信号进行A/D采样,将声音信号转换为数字信号,然后进入FPGA中,FPGA将数字音频信号信号调制成两路互补的40KHz以上的脉宽可调的PWM信号,利用脉宽可调PWM信号将音频输入信号转换成高频开关信号,从而使功率开关管处于D类工作状态,因此,实现了高效率、低失真的目的.The design of MCU and FPGA control with high efficiency and low distortion of the D amplifier was presented. Firstly, MCU collects A/D sampling for sound signals and transforms it into digital signal. Then the digital signal will be sent to FPGA and digital audio signal was modulated into PWM signal with two complementary and above two 40 KHz adjustable pulse width by FPGA. Audio input signal was transformed into high-frequency switching signal by adjustable pulse width PWM Which makes power switch tube in D kind of work condition, therefore, realizing the purpose of high efficiency and low distortion.

关 键 词：D类功放 单片机 PWM信号 FPGA 

分 类 号：TN722.1[电子电信—电路与系统]