本设计以超低功耗单片机MSP430F149作为微控制器，利用MSP430F149 的定时器模块Timer_A和Timer_B 在比较模式下输出的脉宽调制(PWM)波形产生直流、正弦波、方波信号，通过运算放大器和功率三极管电路产生符合设计要求的电压和电流信号。可以通过4*4键盘选择波形类型和输出信号的幅值和频率，并且应用液晶显示器实现数据输出-This application report describes how to simultaneously create a sine wave, a ramp, and a dc level with pulse-width modulated (PWM) signals from Timer_A and Timer_B on the MSP430 ultralow power family of microcontrollers,and enlarge the voltage by the power triode transistor to meet the basic requests.with a 4*4 keyborad,we can choose the type ,range and frequency of the wave.