An analogue computing circuit for the evaluation of the ratio of two slowly-varying potentials
R L Gordon · Journal of Scientific Instruments · 1954
An electronic circuit is described which accurately computes the ratio of two slowly-varying potentials, displaying the result as a meter deflexion. Feedback is used to reduce the sensitivity of the circuit to valve characteristic variations, and an accuracy of better than 1% of full-scale deflexion of the meter has been obtained within wide input limits. Computations of reciprocals and products may be performed by similar means. Several possible applications of the device are mentioned.