Design of Dual Phase Signals Generator Based on AD9833

On the basis of analyzing the working principle of AD9833 chip, taking MSP430F135 as main circuit, a novel dual tunable phase difference signal generator based on AD9833 is designed. The hardware circuits consist of two channel signal generating circuit, dual phase amplitude modulating circuit, key and microcontroller circuit, display driving circuit and power source and so on. Testing results show that the signal generator has a lot of a lot of merits such as continuous adjustable phase difference of two channel signals, wide output frequency, stable frequency output, low output error, which can efficaciously address the shortcomings of modulating the phase difference of two channel output signals by phase-shifting network.