摘要:
An integrated boost and local word line drive system that enhances the speed of the word line drive without providing excessive voltage stresses to the driver devices. A charge reservoir (20) stores a boost voltage (BST) under the control of a charge pump (15) that is regulated by a voltage regulator (10). One of the local word lines (LWL) coupled to a selected master word line (MWL) is enabled by a driver (50) that receives the boost voltage (BST). The switching times and signal slew rates of the driver, as well as the boost voltage, are controlled to prevent excessive gate stresses in the support circuitry.
摘要:
A test circuit is provided wherein data is stored in circuits or cells of an array or matrix with the use of conventional or normal operating voltages. Voltages at internal nodes of the circuits or cells are altered to magnitudes beyond the normal operating ranges, which includes significantly decreasing the offset voltage, for a short period of time and then the stored data is read out at normal voltages and currents and compared with the data written into the circuits or cells.
摘要:
An integrated boost and local word line drive system that enhances the speed of the word line drive without providing excessive voltage stresses to the driver devices. A charge reservoir (20) stores a boost voltage (BST) under the control of a charge pump (15) that is regulated by a voltage regulator (10). One of the local word lines (LWL) coupled to a selected master word line (MWL) is enabled by a driver (50) that receives the boost voltage (BST). The switching times and signal slew rates of the driver, as well as the boost voltage, are controlled to prevent excessive gate stresses in the support circuitry.
摘要:
This describes a bipolar semiconductor dynamic RAM cell array in which there is provided a plurality of capacitive storage data cells each being coupled to a respective capacitively loaded bit line and to one another through a common word line. A supply means is coupled to the word line for biasing each cell of the array with respect to its respective bit line to cause the bit line capacitance to set the conductive state of each cell so as to set the respective capacitive storage means of each cell to a selected charge state. The rate at which the storage means of any one cell reaches a selected state is a function of the charge state of any cell, and its respective bit line capacitance, positioned between the selected cell and the supply means.
摘要:
This describes a bipolar semiconductor dynamic RAM cell array in which there is provided a plurality of capacitive storage data cells each being coupled to a respective capacitively loaded bit line and to one another through a common word line. A supply means is coupled to the word line for biasing each cell of the array with respect to its respective bit line to cause the bit line capacitance to set the conductive state of each cell so as to set the respective capacitive storage means of each cell to a selected charge state. The rate at which the storage means of any one cell reaches a selected state is a function of the charge state of any cell, and its respective bit line capacitance, positioned between the selected cell and the supply means.
摘要:
A test circuit is provided wherein data is stored in circuits or cells of an array or matrix with the use of conventional or normal operating voltages. Voltages at internal nodes of the circuits or cells are altered to magnitudes beyond the normal operating ranges, which includes significantly decreasing the offset voltage, for a short period of time and then the stored data is read out at normal voltages and currents and compared with the data written into the circuits or cells.
摘要:
Bei dem Treiberschaltungssystem enthalten die Wortleitungsschalter (10, 10A) jeweils zwei als Stromverstärker dienende Transistoren (T2, T4), von denen der erste den zweiten steuert. Sämtliche Wortleitungsschalter sind durch eine erste gemeinsame Leitung (A) miteinander und über einen ersten gemeinsamen Widerstand (R A ) mit dem einen Pol (+V) der Betriebsspannungsquelle verbunden. Über eine zweite gemeinsame Leitung (B) und einen zweiten gemeinsamen Widerstand (R B ) sind sie an den anderen Pol der Betriebsspannungsquelle angeschlossen. Die Kapazitäten (C A , C s ) der ersten und zweiten gemeinsamen Leitungen sind durch die daran angeschlossenen Sperrschichtkapazitäten (C1, C2) der beiden Transistoren eines Wortleitungsschalters vergrößert. Bei Auswählen einer Wortleitung fließt daher ein durch das Entladen der Kapazität (C A ) der ersten gemeinsamen Leitung bedingter Überschußstrom (I C2 ) durch den ersten Transistor, welcher Strom in dem zweiten Transistor verstärkt wird und ein schnelles Entladen der ausgewählten Wortleitung (WLB) ermöglicht. Ein Leitendwerden nicht ausgewählter Wortleitungsschalter wird dadurch verhindert, daß das Potential der ersten gemeinsamen Leitung bei Auswahl eines Wortleitungsschalters durch den Entladestrom ihrer Kapazität abgesenkt und das der zweiten gemeinsamen Wortleitung durch Aufladen ihrer Kapazität angehoben wird.