The Dual Sine Signal Generator Design Based on the Principle of Difference Frequency Filtering

摘要

The paper attempts to realize the processing scheme of low cost dual sine wave generator. It used single-chip microcomputer and CPTD(Complex Programable Logic Device) as the control core. It maked use of CPLD and discrete component simulations to implement DDS principle. It utilized the filter circuit, integrated op-amp circuit and multiplier circuit instead of DAC chip. The range of frequency, amplitude and phase difference are lHz~1000Hz, 1V~3V and 0°~359°, respectively. The results show that a 2-channel sine signal generator can be designed with adjustable frequency, amplitude and phase difference.