Accession Number : AD0896855

Title :   Project Whirlwind. Volume 15. Crystals, Flip-Flop Circuits and AC Coupling.

Descriptive Note : Summary rept. no. 2.

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE SERVOMECHANISMS LAB

Report Date : NOV 1947

Pagination or Media Count : 163

Abstract : The high back-voltage germanium-crystal rectifier possesses many advantages over the vacuum-tube diodes. It has a much lower forward resistance and has a current-voltage characterisitc which passes through the origin. In addition, it is small, requiring little space, no heater power, and having very small interelectrode capacitance. Its disadvantage is that it has a back conductance which frequently cannot be neglected and which increases with temperatures. Crystals are used in whirlwind I for clamping (d-c restoration), for isolation in coupling trigger sources to flip-flops, for mixing signals in a common load, in high-speed multi-position switches, and in pulse-generating circuits.

Descriptors :   (*DIGITAL COMPUTERS, FEASIBILITY STUDIES), CRYSTAL RECTIFIERS, GERMANIUM, SEMICONDUCTOR DIODES, LOGIC CIRCUITS, COMPUTER LOGIC, RESISTORS, COUPLING CIRCUITS.

Subject Categories : Electrical and Electronic Equipment
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE