CMOS powerless rom code mask option select

Details CMOS powerless rom code mask option select CMOS powerless rom code mask option select

1984-11-01

1987-08-18

Karlsen, Ernest F.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324 73R, G01R 3128

Patent

active

046879897

ABSTRACT:
An integrated circuit having an option between two or more configurations and also using a patterned ion-implant for impressing data (such as a ROM section of the circuit) may advantageously perform the option-specification simultaneously with the ROM; using a powerless option-specifying circuit permits testing portions of the circuit before the implantation step.

REFERENCES:
patent: 3982138 (1976-09-01), Luisi et al.
patent: 4140924 (1979-02-01), Oguey et al.
patent: 4336495 (1982-06-01), Hapke
patent: 4490673 (1984-12-01), Blum et al.

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