Based On The Design Of The Dds Function Generator

Function Generator is one of the most important general instruments in the field of infrastructure of electronic industry and manufacture, etc. Given the abilities of generating a great deal of signals with different amplitude and different frequency, it can be used to evaluat the function of a new circuit. With the development of modern electronic technology and VLSI technology, Directly Digital Synthesising DDS technology that use FPGA can greatly improve the performance of function genertor and cut down production costs.In the light of"Function Generator", a project undertaken by our teaching and research group .In-depth understanding of the principle of DDS, this paper realized the wave synthesis of Function Generator with DDS technology. On the basis of a careful analysis project requirement; and then gives a set of specific design steps .Finally, to count those problems occurred during the debugging and testing process, author makes deeply ananlysis and gives some practival settlements.This paper will focus on the following points:1. Through analyzing the hardware need of the Function Generator, the project is chosen according to the designing demand of the instrument. And select adaptive Microprocessor Unit and FPGA chip. The design for the circuit of the instrument system module is completed based the Microprocessor Unit.2. Go into one question that is the design of monitor software. Through the C51 language.it makes many functions come true including the flexible controlling of the frequency and amplitude.3. The design and debugging of the hardware and the software are finished. The test results for the prototype machine show that the specifications have meet the design requirements.