Tham khảo tài liệu 'data acquisition part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 16 Data Acquisition 3. As a consequence if one wants to add some WGN to increase performance by averaging the choice is dictated by the number of samples that may be averaged. This is clearly suggested by the intersecting continuous lines in Fig. 18 and better illustrated by Fig. 19 in which ENOB is plotted as a function of ơn for fixed N . It is clear for example that for N 4 it is convenient ơn - LSB etc. Quite surprisingly the very frequent choice an is optimal only for N of the order of 213 . Fig. 14. ENOB of an 8-bit linear DAS with input WGN ơn LSB as a function of the number N of the averaged samples. Noise Averaging and Dithering in Data Acquisition Systems 17 Fig. 15. ENOB of an 8-bit linear DAS with input WGN ơn LSB as a function of the number N of the averaged samples. 18 Data Acquisition Fig. 16. ENOB of an 8-bit linear DAS with input WGN ơn LSB as a function of the number N of the averaged .
