发明名称 Method of electrically converting an analog signal into a digital representation
摘要 A method is described for electrically converting an analog signal into a digital representation in a manner that maximizes noise rejection. The digital representation is formed from a preselected number of discrete points corresponding to sampled approximations of the analog signal. In establishing the magnitudes of the respective points, digital samples of the analog signal are taken at a predetermined number of discrete coordinates along the analog signal on either side of the respective discrete points. The predetermined number of coordinates are averaged and employed as corresponding approximations for the respective discrete points in the digital representative reproduction of the analog signal. The effects of harmonics of power line frequencies associated with processing electrical equipment are minimized by sampling the discrete coordinates for a particular point over an integral number of cycles of the power line frequency. In addition, noise having a high frequency, low duty cycle can be minimized by sampling a relatively large number of discrete coordinates over a period substantially greater than the occurrence of the noise.
申请公布号 US4308098(A) 申请公布日期 1981.12.29
申请号 US19780944497 申请日期 1978.09.21
申请人 WESTINGHOUSE ELECTRIC CORP. 发明人 NEUNER, JAMES A.;EINOLF, JR., CHARLES W.;SZABO, ANDRAS I.
分类号 G01T3/00;G06F17/40;H03M1/00;(IPC1-7):G21C17/00;H03K13/02 主分类号 G01T3/00
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