吉林化工学院学报
吉林化工學院學報
길림화공학원학보
JOURNAL OF JILIN INSTITUTE OF CHEMICAL TECHNOLOGY
2012年
5期
69-72
,共4页
D类功放%单片机%PWM信号%FPGA
D類功放%單片機%PWM信號%FPGA
D류공방%단편궤%PWM신호%FPGA
D Class Audio Power Amplifier%MCU%PWM Signal%FPGA
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.
提齣瞭基于單片機及FPGA控製的高效率、低失真的D類功放設計.首先,單片機對聲音信號進行A/D採樣,將聲音信號轉換為數字信號,然後進入FPGA中,FPGA將數字音頻信號信號調製成兩路互補的40KHz以上的脈寬可調的PWM信號,利用脈寬可調PWM信號將音頻輸入信號轉換成高頻開關信號,從而使功率開關管處于D類工作狀態,因此,實現瞭高效率、低失真的目的.
제출료기우단편궤급FPGA공제적고효솔、저실진적D류공방설계.수선,단편궤대성음신호진행A/D채양,장성음신호전환위수자신호,연후진입FPGA중,FPGA장수자음빈신호신호조제성량로호보적40KHz이상적맥관가조적PWM신호,이용맥관가조PWM신호장음빈수입신호전환성고빈개관신호,종이사공솔개관관처우D류공작상태,인차,실현료고효솔、저실진적목적.
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.
