Method and device for improving the resolution in the digitisation of an analog signal,申请号DE19863611922-传众专利搜索

Method and device for improving the resolution in the digitisation of an analog signal

申请公布号：DE3611922(A1)

申请号：DE19863611922

申请日期：1986.04.09

申请公布日期：1987.10.22

申请人：

PIERBURG GMBH & CO KG

发明人：HENNING,MANFRED,DIPL.-ING.

分类号：G01F15/06;H03M1/00

主分类号：G01F15/06

摘要：To improve the quantisation-related resolution accuracy in the digitisation of analog signals with a wide dynamic range, it is proposed to digitise the unamplified analog signal and the amplified analog signal separately. The resultant amplified digital signal is then amplified or correspondingly divided by the reciprocal gain factor. The digital signals thus produced are finally combined area by area by a weighting-type of adding up. In the area of large values of the analog signal, only the unamplified digital signal is used. In the area of small values of the analog signal, only the digital signal amplified back to normal level is used. In a transition area of medium-sized values of the analog signal, a sliding, preferably linear signal transition occurs between the two digital signals. For this purpose, a weighting factor, which is variable in the transition area, is derived from the amplified digital signal and is correspondingly taken into consideration in an addition circuit for forming the final digital signal.