Power strobing to achieve a tri state

Details Power strobing to achieve a tri state Power strobing to achieve a tri state

1976-03-30

1977-08-23

Yusko, Donald J.

Communications: electrical

Digital comparator systems

340173R, 307209, 307238, 307246, G11C 1300, G11C 1140

Patent

active

040443302

ABSTRACT:
Apparatus and a method for coupling and uncoupling data-read lines of a memory array to a data bus. The data read-out lines of a memory array which is comprised of any combination of latched or non-latched tri-state memories are coupled to the data bus utilizing a conventional TTL circuit in combination with a power driver to simulate a tri-state buffer circuit. When the power driver removes power from the TTL circuit, a tri-state circuit is simulated; whereas when the power driver applies power to the TTL circuit, it operates in its normal mode and a normal impedance is presented between the data bus and the data-out lines of the memory array.

REFERENCES:
patent: 3501754 (1970-03-01), Davie
patent: 3564517 (1971-02-01), McLean et al.
patent: 3665473 (1972-05-01), Heimbigner
patent: 3806880 (1974-04-01), Spence
patent: 3940571 (1976-02-01), Ashley
patent: 3942160 (1976-03-01), Yu

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