Static information storage and retrieval – Systems using particular element – Flip-flop
Patent
1990-06-04
1992-05-26
Popek, Joseph A.
Static information storage and retrieval
Systems using particular element
Flip-flop
365179, 365190, 3652256, G11C 1140
Patent
active
051173913
ABSTRACT:
A bipolar memory array arranged in a row and column matrix is responsive to a plurality of word line driver transistors for selecting one row of memory cells thereof. The current flowing through each memory cell is provided by a pair or lateral PNP transistor current source loads. The collectors of the word line driver transistors are commonly connected for distributing the source of collector current flowing therethrough between the bases of all of the laterla PNP transistor current sources of the entire memory array which maintains a constant current flow through each of the memory cells during the select and deselect cycles thereby maintaining a constant memory cell array power dissipation which allows for expanded capacity of the memory array and a performance improvement.
REFERENCES:
patent: 4618944 (1986-10-01), Okajima
patent: 4697251 (1985-12-01), Birrittella et al.
patent: 4730277 (1988-03-01), Stipanuk
patent: 4821234 (1989-04-01), Nakase
Wiedmann et al., "Small-Size Low-Power Bipolar Memory Cell", IEEE Journal of Solid-State Circuits vol. SC-6, pp. 355-360.
Bushey Thomas P.
Hwang Bor-Yuan
Atkins Robert D.
Lane Jack A.
Motorola Inc.
Popek Joseph A.
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