A digitally programmable multitone generator for coherent signaldetection measurement systems

A digitally programmable multitone generator is presented. The various output signals can be of any shape but periodic, and show absolutely stable phase relations. The proposed generator is useful in modern measurement systems such as in homodyne vector network analyzers or in other coherent measurement systems. It might be realized as a two-chip integrated circuit, one chip for logic and one read-only memory