Accession Number : AD0681592

Title :   LONG LASTING MEMORY DEVICE WITH METAL PERFORATION CARDS (DZP-MK),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Chernyak,R. Ya. ; Salkov,Yu. G. ; Pavlykh,V. M.

Report Date : 14 MAY 1968

Pagination or Media Count : 12

Abstract : A permanent storage unit (DZP-MK) with metallic punched cards is proposed. The standard permalloy or aluminum card (0.1 mm thick) is used for information storage; this card has 80 columns, with a total capacity of 80 x 12 = 960 bits or 24 numbers of 40 bits each. The DZP-MK unit consists of separate storage cells with a single metallic punched card in each cell. The cells consist of two insulating plates such as micarta an interrogation plate and a readout plate. Each plate has 80 grooves, (corresponding to column locations) 1 mm deep and 1.2 mm wide, and also has 12 permalloy strips (3.2 mm wide and 100 micrometers thick) along the horizontal lines. The interrogate and readout wires lie in the grooves. The punched card is placed between these plates, and each hole permits maximum electromagnetic coupling between the interrogation and readout wires resulting in generation of the ONE signal in the readout wire when a pulsed signal is applied to the interrogation wire. With this signal equal to 0.6 amp at a frequency of 1 MHz, the ONE readout signal of 16 mv and ZERO readout signal of 4 mv were obtained at a signal-to-noise ratio of 8. Four cells are combined in the storage section, and 11 such sections can store 1024 numbers of 40 bits each. (Author)

Descriptors :   (*MEMORY DEVICES, METAL PLATES), (*PUNCHED CARDS, METAL PLATES), ALUMINUM, USSR

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE