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US 4,070,654 AGranted
Bipolar read-only memory
AssigneeHitachi, Ltd.
InventorSeiichi Tachi
Life of this patent
Estimating the term…
Abstract
A bipolar read-only memory comprising a matrix circuit having selection input lines, digit output lines and Schottky barrier diodes connected between the selection input lines and the digit input lines according to information contained in the memory, a selection input circuit of an I.sup.2 L construction electrically associated with the selection input lines and a digit output circuit of an I.sup.2 L construction electrically associated with the digit output lines.
Claims4
A bipolar read-only memory containing information, comprising:
- input and output terminals;
- a matrix circuit having selection input lines, digit output lines and a plurality of Schottky barrier diodes connected between predetermined ones of said selection input lines and predetermined ones of said digit output lines in accordance with the contained information, said input and output lines being arranged in rows and columns;
- a selection input circuit having a first group of bipolar transistors and a first group of injection current sources one for each said first group transistor, each said first group transistor interconnecting different one of said input terminals and different one of said selection input lines;
- and
- a digit output circuit having a second group of bipolar transistors and a second group of injection current sources one for each said second group transistor, each said second group transistor interconnecting different one of said output terminals and different one of said digit output lines.
2 more elements
Dependencies are inferred from the claim text.