Design and Implementation of Multiple Parallel-sync Audio Data Acquisition System Based on AD7656

A strict multiple parallel-sync data acquisition program of ADC has extracted to settle the multi-source and multi-sensor problem about instantaneous model of Blind Source Separation(BSS)in audio frequency.The features and functions of ADC AD7656 are introduced in this paper firstly,and then a program of the multiple parallel-sync audio data acquisition is put forward and implemented.The design of AD7656′s around circuits and its control logic are described in detail,the problem of time sequence and data separation is solved as well.The acquisition system′s design of data interface and the driver is indicated.The CPLD is used as control core to simplify the design,also,it is easier to expand the application of the system.The testing results are given at last.Now,the system has been used in related research subject successfully.