Abstract
In scientific research, engineering education and production practice, such as industrial process control, teaching experiments, mechanical vibration, dynamic analysis, material testing, biomedical and other fields often need to use low-frequency signal generator. In our daily lives, and some scientific research, sawtooth and sine wave, square wave signals are commonly used in the basic test signals. Function generator as a generic electronic equipment, in production, scientific research, monitoring and control, communications and other fields have been widely used. But the market can see the accuracy of such equipment in the frequency, bandwidth, waveform types and program-controlled areas have been unable to meet the needs of practical applications in many areas. Combined with various types of semiconductor integrated chip features the rapid production, have enabled us to develop a high-precision, wide bandwidth, and can produce a variety of waveforms such as multi-function generator with programmable possible. The design is based on direct digital frequency synthesis (DDS) in the low-frequency signal generator. The design of hardware circuit structure is simple and flexible software control, the output signal frequency stability, high resolution. This machine is small, cheap, low power consumption, frequency of moderate, and easy to carry.
Keywords:Signal generator, High Precision, High resolution, Low cost