Open Access
Subscription or Fee Access
Optimization for Multi-channel Acquisition Scheme with Oversampling Method
Chengqun Chu, Yongfeng Ren, Xin Liu, Yongqiu Zheng
Abstract
A compact and flexible multi-channel acquisition system based on Field programmable gate array (FPGA) for heterogeneous input signals is proposed in the paper. A single high speed 16-bit analogue to digital converter (ADC) with several multiplexers is used for the digitization of the input analogue signals. An efficient sampling scheme to perform simultaneous acquisition for the multi-channel acquisition system with different bandwidths is proposed to optimize the ADC sampling rate. The scheme uses the internal resource in FPGA to establish a sampling lookup table according to the sampling scheme. The paper also describes an improved method by utilizing oversampling technology to improving the resolution. A dc signal is applied to complete the performance test by using the noise histogram method. The comparison showed that the method can effectively reduce the root mean square (RMS) noise and improve the resolution. With its flexibility in reconfiguration, the proposed system will be applicable to many applications with amounts of inputs.
Keywords
Multi-channel acquisition, sampling scheme, Oversampling method, Histogram test.
Full Text:
PDF
Disclaimer/Regarding indexing issue:
We have provided the online access of all issues and papers to the indexing agencies (as given on journal web site). It’s depend on indexing agencies when, how and what manner they can index or not. Hence, we like to inform that on the basis of earlier indexing, we can’t predict the today or future indexing policy of third party (i.e. indexing agencies) as they have right to discontinue any journal at any time without prior information to the journal. So, please neither sends any question nor expects any answer from us on the behalf of third party i.e. indexing agencies.Hence, we will not issue any certificate or letter for indexing issue. Our role is just to provide the online access to them. So we do properly this and one can visit indexing agencies website to get the authentic information. Also: DOI is paid service which provided by a third party. We never mentioned that we go for this for our any journal. However, journal have no objection if author go directly for this paid DOI service.