Design Of Signal Generator Based On MSP430and MAX038

The signal generator is a signal source used as an excitation source for electronicmeasurements. It is an important test equipment for the production line, teaching andresearch, electronic test and simulation.This paper briefly introduces the history and research status of the signal generator,followed by the principle explanation of the signal generator. Based on the above, thedesign schemes of hardware and software are given and each module is described in detail.In this paper MAX038is used as a signal generating chip, MSP430F149is used as acontrol chip, and certain circuits are added. It can generate sine wave, square wave,triangle wave, and the combination waveform of sine and triangle wave with adjustablefrequency and amplitude.The hardware circuits mainly include the power supply, MCU and its peripherals,human-computer interface, DAC module, amplifier and so on. The software designincludes the main procedure, drivers for each peripheral module, signal measurement andparameter calibration algorithm.For the output signal, its waveform is selected by the keyboard; its frequency andamplitude can be adjusted manually or input using the keyboard; the relevant parameters ofthe current waveform can be displayed on LCD. By the hardware and the software debug,the frequency range is100Hz～10MHz, the amplitude can reach4V. On the whole thedesign goals are achieved.