A 2-Channel data link for combined analog-digital simulation

The number of computing laboratories using both, analog and digital computers is greatly increasing. Each type of computer is normally operated independently of the other, receiving the computing task for which it is better suited. It is generally agreed that neither type of computer is ideal for solving all classes of problems. Analog computers, for example, are widely used for the simulation of physical systems; digital computers, on the other hand, are used extensively for data analysis and for the solution of very complex physical and mathematical problems. It is becoming increasingly evident that there would be many advantages to having a computer available which is part analog and part digital. For example, such a computer would make it possible to simulate sampled-data control systems more realistically. Also some of the disadvantages of one type of computer could be overcome by the advantages of the other.