On the linguistic description of digital circuits suitable for symbolic circuit analysis

A linguistic description of digital circuits and a processing system for it are proposed. By the proposed method, it is possible to describe a whole circuit as interconnections of several sub-circuits. In the proposed system a whole circuit is dealt with as a main routine of ordinal procedural languages and sub-circuits as sub routines and nodes in the sub-circuits can be managed automatically by the system without users´ management. The proposed descriptions are also effective for simulation of the adaptive signal processing circuit because the system is designed to manage coefficients of each sub-circuit independently. Effective descriptions are also possible for the circuits which have the regular structures because the conditional branch instructions, the repeat instructions and the recursive calls of sub routines are prepared. The compiler-interpreter method is adopted for the basic construction of the proposed system, and yacc/lex is used to develop the system