Accession Number:

AD0705119

Title:

MULTICYCLE MAGNETIC-SEMICONDUCTOR MEMORY AND LOGIC,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1970-03-25

Pagination or Media Count:

18.0

Abstract:

Descriptions are given of multiclock frequency memory and logic circuits, based on standardized ferrite-diode and ferrite-transistor elements. These circuits are more economical and have better performance characteristics than systems operating with two clock frequencies. The economy and superior performance of the described systems are primarily due to two factors 1 multiclock frequency logic can execute operations uniformly and 2 fewer elements are required in multiclock frequency logic and shift registers making possible, in a number of cases, greater operating speed. For example, a shift register with 4 clock frequencies and 4 synchronizing inputs operates 6 times faster and requires fewer elements than a register with c equals 2 having the same bit capacity. The disadvantage of such a register is that it requires a gate operating at a frequency of 4f, where f is the basic clock frequency. When multiclock frequency registers and logic circuits are combined, an even greater economy in the number of elements used can be achieved. About 10-25 percent fewer elements are required to build a register with a two-stage adder, operating with 4 clock frequencies, than for a comparable ciruict with c equals 2. Author

Subject Categories:

  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE