DAC8412转换器及其在光纤陀螺检测电路中的应用

为了程序控制光纤陀螺检测电路中的三路可调电压基准,采用现场可编程门阵列(FPGA)控制多路D/A转换器的方法。首先介绍了DAC8412的特点,设计了多路D/A转换硬件电路;接着采用硬件描述语言Verilog HDL进行FPGA逻辑编程,并给出了驱动DAC8412的仿真波形;最后测试了D/A的稳定精度。陀螺零漂测试结果说明该方法可行,这种方法给陀螺电路调试带来极大方便。

DAC8412 and its application in FOG detection circuit design

In order to program control for 3 road adjustable voltage reference of fiber optic gyroscope detection circuit,the method of multichannel D/A controlled by field programmable gate array(FPGA) is adopted.Firstly,the characteristic of DAC8412 is introduced,and a circuit of multichannel D/A is designed.Secondly,FPGA logic program in Verilog HDL language is written and emulation waveform of driving DAC8412 is given.Finally accuracy of D/A is tested.Test result of FOG suggests that this method is feasible and will bring about great convenience to the debugging of FOG circuit.