Multiphase clocking for MOS electronic calculator or digital pro

Details Multiphase clocking for MOS electronic calculator or digital pro Multiphase clocking for MOS electronic calculator or digital pro

1977-07-08

1981-03-24

Zache, Raulfe B.

Boots, shoes, and leggings

364736, G06F 104, G06F 738, G06F 1306

Patent

active

042584299

ABSTRACT:
An MOS/LSI semiconductor chip for providing the functions of an electronic calculator or digital processor includes a RAM for data storage, a ROM for program instruction storage, an arithmetic unit for performing operations on data, and control circuitry for defining the functions of the machine in response to instructions from the ROM as well as conditions in the machine and inputs from external. The operation is digit oriented in that in a basic machine cycle one digit of the RAM is accessed. Also, in a machine cycle the ROM is addressed to provide an instruction word, and the word is decoded and executed. A unique five phase clocking arrangement is used which permits the complex operations to be implemented within a machine cycle.

REFERENCES:
patent: 3764992 (1973-10-01), Milne
patent: 3806880 (1974-04-01), Spence
patent: 3891973 (1975-06-01), Maxwell
patent: 3892957 (1975-07-01), Bryant

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