Title :
An Electronic Analog Computing Technique for the Solution of Trigonometric Problems
Author_Institution :
Dept. of Electrical Engrg., Electronics Res. Labs., Columbia University Engineering Center, New York 27, New York.
Abstract :
This paper describes a technique for the solution of trigonometric problems which utilizes a fixed carrier frequency, demodulators, modulators, resistors, condensers, and operational amplifiers in feedback configurations. Basic solutions are in the form of the amplitudes and phases of voltages relative to a reference carrier. A typical 400-cycle computer with an accuracy of 0.2 per cent is described in which output phases and amplitudes are expressed as the time delay between two pulses.
Keywords :
Analog computers; Circuits; Delay effects; Density measurement; Error correction; Frequency; Timing; Uncertainty; Voltage; Writing;
Journal_Title :
Electronic Computers, IRE Transactions on
DOI :
10.1109/IRETELC.1955.5407907
