Digital power amplifier with digital negative feedback

A digital power amplifier with digital negative feedback is to connect analog signal input module 14, digital signal input module 15, output of voltage digital negative feedback module 17 and input of driven output module 16 with operation unit 4 by a data bus, one of load R1, links to the output of 16 the other connects to the earth, DC power, is added by +Ee, -Ee, foreign signals are input from1,2,3,4 terminals to get analog expected value after selecting, mixing and computing by unit 4, the actual value of analog output is feedback to unit 4 by module 17, the delivered control instructionafter error evaluation controls the on-off of the final power amplified tube in driven output module to get the analog output after filtering ultra harmonics by low pass filter in modules 16. 一种具有数字负反馈的数字功率放大器、模拟信号输入模块14、数字信号输入模块15、电压数字负反馈模块17的输出端和驱动输出模块16的输入端通过数据总线与运算单元4相连，负载Rl一端与驱动输出模块16的输出端相连，另一端与"地"相连，直流电源由+Ee、-Ee加入，外部信号由1、2、3号端子输入，经运算单元4选择、混合、计算后得到模拟输出期望值，模拟输出的实际值经电压数字负反馈模块17反馈至运算单元4，经计算偏差后发出的控制指令控制驱动输出模块内末级功放管的导通与截止，经驱动输出模块16内的低通滤波器滤去高次谐波后得到模拟输出。