Abstract:
A monolithic semiconductor array of bi-level powered memory cells is provided with a number of on-chip row and column primary latching circuits. The primary latching circuits allow for the down-powering of the on-chip row and column address decoders after a particular chip and a particular storage cell on the chip have been selected by a respective address signal and a set signal. An auxiliary latching circuit, substantially identical to each of the aforesaid primary latching circuits, also is provided on-chip and receives the same set signal as does each primary latching circuit. The primary latching circuits and the auxiliary latching circuit are ''''set'''' substantially simultaneously by the set signal. The setting of the auxiliary latching circuit initiates a signal which downpowers each of the on-chip address decoders. Means are also provided on-chip for resetting each of the selected primary and the auxiliary latching circuits upon the termination of the chip select signal.
Abstract:
A signal voltage level translating circuit receives an input electrical signal having predetermined voltage swings about a first predetermined voltage level and translates the voltage level of the signal so that at the output there is provided an output electrical signal having the same voltage swings about a second predetermined voltage level translated with respect to the first voltage level. An input transistor has its base connected to the input node and its emitter connected to one end of a first impedance element having its other end connected to the collector of a current source transistor. A fixed reference voltage is applied to the base of a reference voltage transistor having its emitter connected to one end of a second impedance element having an impedance equal to that of the first impedance element. The other end of the second impedance element is connected to the collector of a diode-connected transistor having its base connected to the base of the current source transistor. The emitter of the diode-connected transistor is connected to the emitter of the current source transistor. If implemented in the form of a monolithic integrated circuit, the diode-connected transistor and current source transistor may have the same base and the same emitter. The translated signal is taken at the output where the first impedance element is connected to the collector of the current source transistor.
Abstract:
An array of memory cells is provided with each cell having a word top line, a word bottom line and a pair of bit lines connected thereto. Either a standby voltage or a select voltage is applied to each of the lines, whereby any cell of the array may be selected by applying a select voltage to the two word lines and one or both bit lines connected to the cell. In one of the disclosed embodiments, the cells are arranged in columns and in groups of rows. Each of a plurality of word top drive lines is connected to all of the rows of the cells of a respective group to select any group of rows, each of a plurality of word bottom drive lines is connected to a respective row of cells in each of the groups to select one row of the selected group, and a plurality of pairs of bit lines are provided with each pair connected to the cells of a respective column to select one column and thereby one cell of the selected row. Each cell preferably comprises a cross-coupled pair of transistors each having a collector and first and second emitters. The word top lines are connected to the collector load impedances, the word bottom lines are connected to the first emitters, and the bit lines are connected to the second emitters.
Abstract:
A signal voltage level translating circuit receives an input electrical signal having predetermined voltage swings about a first predetermined voltage level and translates the voltage level of the signal so that at the output there is provided an output electrical signal having the same voltage swings about a second predetermined voltage level translated with respect to the first voltage level. An input transistor has its base connected to the input node and its emitter connected to one end of a first impedance element having its other end connected to the collector of a current source transistor. A fixed reference voltage is applied to the base of a reference voltage transistor having its emitter connected to one end of a second impedance element having an impedance equal to that of the first impedance element. The other end of the second impedance element is connected to the collector of a diode-connected transistor having its base connected to the base of the current source transistor. The emitter of the diode-connected transistor is connected to the emitter of the current source transistor. If implemented in the form of a monolithic integrated circuit, the diode-connected transistor and current source transistor may have the same base and the same emitter. The translated signal is taken at the output where the first impedance element is connected to the collector of the current source transistor.
Abstract:
An array of memory cells is provided with each cell having a word top line, a word bottom line and a pair of bit lines connected thereto. Either a standby voltage or a select voltage is applied to each of the lines, whereby any cell of the array may be selected by applying a select voltage to the two word lines and one or both bit lines connected to the cell. In one of the disclosed embodiments, the cells are arranged in columns and in groups of rows. Each of a plurality of word top drive lines is connected to all of the rows of the cells of a respective group to select any group of rows, each of a plurality of word bottom drive lines is connected to a respective row of cells in each of the groups to select one row of the selected group, and a plurality of pairs of bit lines are provided with each pair connected to the cells of a respective column to select one column and thereby one cell of the selected row. Each cell preferably comprises a cross-coupled pair of transistors each having a collector and first and second emitters. The word top lines are connected to the collector load impedances, the word bottom lines are connected to the first emitters, and the bit lines are connected to the second emitters.