PROJECT LIGHTNING
Abstract
Investigations of surface sensing of magnetic flux switching have continued but the results are still inconclusive. A major problem is excessive coupling of the sense loop to the drive line. Methods for cancelling this coupling are being investigated. The application of a transverse field to a ferrite element has been found to reduce the switching time significantly while lowering the output voltage only slightly. The use of a precision masking jig has contributed to considerable progress in the fabrication of the close-spaced structures required for high-speed operation. A study of the alloying temperature effect on the electrical characteristics of 50-ma Ge tunnel diodes showed a sharp increase of speed ratio with lower alloying temperatures. This appears to be consistent with predictions. Electromagnetic delayline storage techniques employing balanced-pair tunnel diode logic circuitry have been investigated. Assuming 1-kmc operation of the balanced-pair circuits, the study indicates that a 1024, 48-bit delay-line memory with 16 ns cycle time will require less than one tunnel diode per stored bit. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1960
- Accession Number
- AD0264437