AD9850内含可编程DDS系统和高速比较器，能实现全数字编程控制的频率合成,信号发生器具有输出频率范围宽，可以输出正弦和方波两种波形，51代码-AD9850 DDS system and includes a programmable high-speed comparator, to achieve all-digital programming control of the frequency synthesizer, the signal generator has an output

采用MSP430F149内部的比较器，将外部输入信号比较为方波，比较门限为0.5*VCC，也可将两个输入口的信号进行比较。-Using MSP430F149 internal comparator, comparing the external input signal is a square wave, comparing the threshold is 0.5* VCC, two input ports can also be compared to the signal.

(msp430g2553)正弦信号，一方面被adc采集获取其幅度信息，另一方面经比较器变成方波，经Timer捕获获取其频率，然后控制SPWM信号的频率与幅度，使输入与输出同幅同频变化。-(Msp430g2553) sinusoidal signal, on the one hand is to get its amplitude information collected adc, on the other hand by the comparator into a square wave, c