A Special-Purpose Navigation Computer Utilizing Current Integrators and Step Motors

The basic principle of this integrating circuit is to allow the current integrator to integrate to a preset reference, reset the current integrator by discharging the integrating capacitor, and count each reset. Thus the total integration can be found by observing the total number of smaller integrations. Each of the smaller integrations represents the same incremental integration since the current integrator is only allowed to integrate to the preset reference. The step motor is used to count the smaller integrations and to move a recording arm in certain applications.