Signal generator, it is a widely used sourse, with the scientific and the technological development,increasing its demands. industrial production and scientific research in the use of signal generator output signal generator output signal, the performance of components and parameters measured, but also the electrical and electronic products for authentication, and adjust parameters of identificatiaon. The signal generator used by the vast majority of Analog circuit components, such as analog signal generator for the low-frequency signals often require output value of the RC great, it will not only difficult to ensure the accuracy of parameters, but also have great size and power consumption. Digital components of low-frequency signal generator, although the low-frequency performance good but larger, more expensive price, therefore, high accuracy, wide-AM, will become a low-cost digital signal generator trend of development.
The graduation project core task is to design:89c51 as the microcontroller, unifies DAC0832 to realize the programmed control to have the sine wave, the sawtooth wave and the square wave three commonly used low-frequency signals. Can choose the waveform and frequency by the keyboard.