PRECISION CURRENT-SOURCE ARRANGEMENT

摘要

A precision current source arrangement with a multiple current source which supplies a number of currents which are identical in a first approximation. These currents are each individually applied to one of the input terminals of a coupling circuit which has an equal number of input and output terminals. By means of a periodic control signal this coupling circuit realizes such a connection pattern between the input and output terminals in a cyclically permuting fashion, that each of the output terminals is coupled to each of the input terminals within a constant cycle time during identical time intervals. By subjecting the currents which appear at these output terminals to a low-pass filter action a number of very accurately identical currents are obtained.