Interference suppression by multi-interval integration in analogue-digital convertors

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Interference suppression by multi-interval integration in analogue-digital convertors

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© The Institution of Electrical Engineers
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A generalised conception of multi-interval integration for the solution of the problem of interference suppression in integrating analogue-digital (a.d.) convertors is presented. Three types of multi-interval integration are described namely nonoverlapped, overlapped and combined. The characteristics of a number of corresponding integration techniques are given in tabular form for several indices of performance particularly chosen for comparison. Special attention is devoted to the increase of the line-frequency suppression. For several integration techniques, an exceptionally high line-frequency suppression, practically without loss in conversion speed, is obtained. Aspects of realisation are also discussed.

Inspec keywords: analogue-digital conversion; interference suppression; integration

Other keywords: generalised conception; interference suppression; line frequency suppression; A/D convertor; multi interval integration

Subjects: Convertors; Electromagnetic compatibility and interference

References

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      • A. Boyer , G. Hanus , Y. Martinez . Conversion analogique numerique. Onde Electr. , 920 - 928
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      • D. Velašević . Reducing line frequency noise rejection in a.d. convertors. Control Eng. , 73 - 75
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      • D. Wheable , S. Outram . (1970) Series mode rejection in integrating digital voltmeters, Electrical interference in instrumentation.
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      • G.B. Kay . Selecting the right digital voltmeter. Electronics , 84 - 90
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      • Knight, R.: `The measurement techniques used in digital voltmeters', Presented at IMEKO-IV, 3–8 June 1967, Warszawa UK, 262.
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