This paper describes a design based on the AD1674 interface circuit, the circuit has a query, three types of interrupt and DMA data transfer function, while by 8253 the port was timed pulse or two A/D start mode. In which DMA was achieved by the rapid transmission of data, while the two A/D start mode will set the sample rate more flexible. Application of this principle of universal design can be inserted into PC-data acquisition board has been used in our high-frequency Doppler, and angle of arrival detection analysis system with satisfactory results. These design methods and principles in other practical data acquisition system design process, will be an important reference value.

AD1674_control.doc

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