A Pulse Position Modulation Analog Computer

An important field of application for computers is in real-time systems simulation. This requires the generation of non-linear functions, obtaining the sums and products of these functions and solving systems of nonlinear differential equations. A new type of analog computer suitable for systems simulation is described which combines the desirable features of the digital and analog computers in its mode of operation. Variables are represented by the time interval between pulses. Utilizing a few basic components, it is possible to carry out the operations of addition, subtraction, multiplication and function generation to 0.1 per cent accuracy.