article · German
Übersicht über die Technik der elektronischen Analogrechner
Introductory technical article by E. Kettel published in Telefunken-Zeitung (Vol. 30, June 1957, Issue 116, pp. 129–145) presenting a comprehensive overview of electronic analog computer technology. Covers computing elements (summation, integration, sign inversion, multiplication, function generation), the theory and implementation of drift-free DC operational amplifiers, and a detailed treatment of the diode-network parabolic multiplier used in Telefunken's own repetitive analog computer (with 22 sum/integrate units, 8 multipliers, ±100 V machine unit). Includes measured error data showing multiplier accuracy better than 0.2% with the described correction techniques.
analog computer fundamentalsoperational amplifiersmultiplier circuitscomputing elements