Abstract—In this study, a simultaneous multi-channel data acquisition system is designed and implemented. The most significant feature of this system is that it can perform sampling of input channels without any time skews and additionally, it is areal-time system.The general architecture of this system is that the analog signals are received through multi-channel ADCs which are chained together to perform the digitalization of these inputs. Chaining of the ADCs allows the optimization of the number of lines on which the digitalized data is placed.The implemented system uses a Field Programmable Gate Array (Spartan-3, XC3S400 FPGA) and multi-channel ADCs (Texas Instruments ADS8556).This system has a typical SNR of 91.5dB and the calculated gain error for this system which is configured for analog voltage inputs of 0-5v, is equal to 0.0015%.
 

Index Term—data acquisition, time skew, real time, simultaneous, FPGA, ADC

Cite: Fatemeh Zahedi and Zahra Zahedi, "Real-Time, Simultaneous Multi-Channel Data Acquisition System with No Time Skews between Input Channels," International Journal of Signal Processing Systems, Vol. 4, No. 1, pp. 17-21, February 2016. doi: 10.12720/ijsps.4.1.17-21