公开(公告)号：US4010422A

公开(公告)日：1977-03-01

申请号：US409425

申请日：1973-10-25

申请人： Kornelis Jan Wouda

发明人： Kornelis Jan Wouda

IPC分类号： H03M1/00 ,  H04B14/04 ,  H04B1/04

CPC分类号： H04B14/04 ,  H03M1/00 ,  H04B14/048 ,  H03M2201/01 ,  H03M2201/14 ,  H03M2201/16 ,  H03M2201/196 ,  H03M2201/2344 ,  H03M2201/4105 ,  H03M2201/4135 ,  H03M2201/4204 ,  H03M2201/4212 ,  H03M2201/4225 ,  H03M2201/4233 ,  H03M2201/425 ,  H03M2201/4262 ,  H03M2201/52 ,  H03M2201/523 ,  H03M2201/534 ,  H03M2201/60 ,  H03M2201/6121 ,  H03M2201/712 ,  H03M2201/715 ,  H03M2201/8124

摘要： A non-linear pulse code modulator wherein input signals are coded into digital representations of amplitude range segments and amplitude in excess of the minimum amplitude within the respective range segment uses a first analog-to-digital converter having a sawtooth-shaped control characteristic to determine the amplitude range segment from an input signal sample. The output of the first analog-to-digital converter is used to effectively divide the signal sample by a factor 2.sup.n, where n corresponds to the determined range. The result of the division is then converted in a second analog-to-digital conversion to a digital signal that is combined with the digital range segment signal for transmission thereof.