摘要:
A dynamic RAM with static column function comprising a predecoder for predecoding both the row address and the column address to output intermediate signals, a row decoder composed of NOR circuits for selecting one row in response to said intermediate signals, a column decoder composed of NAND circuits for selecting one column in response to said intermediate signals, and a logic inversion circuit for matching the logics for the intermediate signal between the row decoder and the column decoder.
摘要:
A level shifting circuit includes a charging means consisting of a charging regulator circuit which charges a second node to a logic “H” by setting a second switching circuit to an ON state and thereafter brings back the second switching circuit to an OFF state when a first node is changed from a logic “H” to a logic “L” by a change of an input signal, and charges the first node to the logic “H” by setting a first switching circuit to the ON state and thereafter brings back the first switching circuit to the OFF state when the second node is changed from the logic “H” to the logic “L” by the change of the input signal.
摘要:
The present invention aims to provide an adhesive composition showing high adhesion and cohesion as well as good heat resistance. Adhesive compositions of the present invention include an imide (meth)acrylate, a monomer having a glass transition temperature of −50° C. or less when it is homopolymerized, and a photoinitiator, wherein the content of the imide (meth)acrylate is 1-20 parts by weight per 100 parts by weight of the monomer.
摘要:
A memory cell circuit of an associative memory composed of only four NMOS transistors is disclosed. Each memory cells of the circuit is connected two bit lines, a word line, a match setup line for commanding coincidence detection, and a match line for transferring the results of detection. The data signals are stored in the gate capacity of each of the transistors 3. This simplified memory cell circuit contributes to higher integration of the associative memory.
摘要:
In a static column dynamic random access memory device in which memory operations including refresh operation are initiated responsive to a row address strobe signal, and the refresh operation for amplification and rewriting of information of the selected memory cell is not interrupted until its completion once it is started by the application of the row address strobe signal even if the row address strobe signal is thereafter removed;a timing circuit provides clocks for controlling the row circuits and the column circuit to cause termination of the memory operations if the row address strobe signal has been removed before the end of the refresh operation, and to cause continuation of the read/write memory operations if the row address strobe signal is still applied at the end of the refresh operation.
摘要:
Each match line is connected to a plurality of CAM cells constituting a CAM array. The respective CAM cells store data applied through a bit line and an inverted-bit line in its data storage portion when selected by a word line. The stored data are applied to a data comparison portion to be compared with retrieval data applied through the bit line and the inverted-bit line, thereby detecting match or mismatch therebetween. A comparison result of the data comparison portion is first stored in a capacitance element in the form of charge. In order to prevent escape of the information stored in the capacitance element, a blocking means blocks a part of a charge and discharge path for the capacitance element. A charge transfer means provided between the capacitance element and the match line transfers a certain amount of charge from either one to the other when information of mismatch is stored in the capacitance element. This causes fluctuation of charge potential on the match line. The fluctuation of potential on the match line depends on the number of mismatched CAM cells out of a plurality of CAM cells connected to the match line. Therefore, detection of potential on the match line permits detecting the number of mismatched CAM cells.
摘要:
An arbiter circuit is disclosed for processing competing requests for access to a shared resource made simultaneously by two subsystems in a multi-processor system. The arbiter circuit includes an SR flip-flop composed of a pair of NAND gates, and functions to block the passage of a subsequent request signal from one subsystem to the SR flip-flop during a predetermined time interval after a request signal from the other subsystem has been supplied to the flip-flop. A result is that the both inputs of the SR flip-flop are not shifted up from the low levels to the high levels at the same time by the simultaneous generation of request signals from both subsystems, thereby eliminating any possibility of the output from the flip-flop floating at an intermediate level between the high and low level.
摘要:
A power on reset pulse generating circuit, which comprises a flip-flop coupled through capacitors to an applied supply voltage to be resettable thereby, a time constant circuit including an array of diode connecting MOS transistors and a capacitor coupled to reset the flip-flop in response to a fast rise time of an applied supply voltage, and another MOS transistor connected to detect a level of a voltage at the output terminal to reset the flip-flop in response to a slow rise time of the applied supply voltage.