Abstract: A miniature digital computer circuit capable of operating in substantially instantaneous real time for determining values of combined varying quantities. The circuit has inputs for two variable digital pulse trains. A decoder and shift register compress bit groups to minimize sizes and operating times of associated digital pulse readout memories, multipliers and adders. The circuit adds to combined functions of the varying quantities the sum of significant terms from a differential expansion of the function, to obtain readouts representing changes in the functions.

Abstract: This system generates signals which vary randomly in frequency. The system includes a digital pulse generator generating multibit digital numbers varying randomly according to an encoded statistical distribution pattern. A first source of digital signals is connected to the pulse generator which perturbates the signals in frequency and applies them to an adder. Another source of digital signals connected to the adder combines with the perturbated first signal. A digital integrator connected to the pulse generator triggers release of the perturbated first signals and converts the combined perturbated signals to multibit outputs which may be applied to digital-to-analog converters, and in turn to frequency modulators to produce analog signals perturbated in accordance with the statistical distribution pattern.