摘要:
An electronic data storage or memory array having DC stable memory cells which utilize the principle of a unique substrate biasing mechanism, whereby a channel region defined by resistive substrate material and formed under a controlled electrode (20) becomes "pinched off' and, in the process, so affects the DC potential at that electrode as to maintain the pinched off condition. Consequently, the memory cell becomes established in a first DC stable state ("one" state). The principle is preferably embodied in a field effect transistor (22), the resistive channel region being connected in a DC conductive path to a fixed resistor (R1) and a potential source (+V). Accordingly, when appropriate signal levels representing a binary "one" are applied to word and bit lines (WL1, BL1) connected to a first controlling, or gate, electrode and to a second controlling electrode, respectively, of the FET, the described pinch-off occurs, with concomitantly high resistance (R2) in the DC path, such that the potential adjacent the controlled electrode (20) is maintained in the "one" state that was initiated by the signals on the word and bit lines. On the other hand, when signals representing a "zero" are applied to the same controlling electrodes, the resistive channel region (R2) under the controlled electrode (20) is no longer pinched-off, whereby the memory cell becomes established in the second or "zero" DC stable state. Means for reading the stored data in the cell are integrated with the cell.
摘要:
In einem bipolaren Halbleiterspeicher mit statischen Speicherzellen aus zwei kreuzgekoppelten Transistoren ist der Emittor jedes Transistors mit einer Bitleitung verbunden. Die Bitleitungen sind mit Abfühlverstärkern geringer Impedanz verbunden, wobei die Verstärkerausgänge miteinander verbunden sind. Dieser Verbindungspunkt ist mit einer Stromquelle verbunden. Durch die niederohmige Verbindung zwischen den Emittoren der beiden Zellentransistoren wird eine alternative Verwendung des Speichers als Festwertspeicher erleichtert.