摘要:
A voltage sense circuit in which first and second parallel connections of complementary MOS transistors are connected between a pair of signal lines connected to memory cells and outputs of a flip-flop circuit for detecting a potential change of the signal line caused by data readout from an accessed memory cell. MOS transistors of one channel type in the parallel connections are adapted to precharge output node capacitors of the flip-flop circuit to a supply voltage level, while MOS transistors of the other channel type are adapted to couple complementary output voltage levels of the flip-flop circuit produced after the data readout and operation of the flip-flop circuit to the signal lines. Use of the parallel connections of complementary MOS transistors enables the application of a single power source for producing gate signals of these MOS transistors.
摘要:
A CMOS semiconductor memory device in which a memory cell array and peripheral circuits are formed on the same semiconductor substrate. Wells of the peripheral circuits with MOS transistors of one channel type formed therein are supplied with a PN junction reverse bias potential higher than that for wells of the memory cell array during the memory operation, while the potential at the peripheral circuit wells is made equal to the potential at the wells of the memory cell array when the memory is not operating. High-speed operation of the memory device may be achieved because the junction capacitance of the MOS transistors formed in the peripheral circuit wells is reduced when the memory is operating.
摘要:
A voltage sensing circuit of differential input type includes at least one differential amplifier circuit connected between two complementary data lines of a semiconductor memory. The differential amplifier circuit detects data in response to a minute potential difference between the data lines and amplifies the same by a substantial change in conductance g.sub.m of metal oxide semiconductor field effect transistors (MOSFET) used in the circuit. When data is read from a semiconductor memory onto the data lines, the differential amplifier sensing circuit detects the data quickly by detecting potential changes of the data lines.
摘要:
The dynamic type semiconductor memory device comprises a refresh circuit and a plurality of memory cells which are connected between a data input line and a data output line, a plurality of read/write command signal lines and a plurality of word selection lines provided for respective semiconductor memory cells. Each semiconductor memory cell comprises serially connected first p-channel MOS transistor and a second n-channel MOS transistor having gate electrodes connected to the read/write command signal line and the data input line respectively, a third p-channel MOS transistor connected between the data output line and the word selection line and having a gate electrode connected to the node between the first and second transistors, and a parasitic capacitance connected to the node between the first and second transistors for storing data.
摘要:
A semiconductor memory device comprising an N conductivity type semiconductor substrate, a P conductivity type well formed in a specified section of the surface of the semiconductor substrate, N conductivity type source and drain regions formed in the P conductivity type well, and a gate insulation layer deposited on the surface of the well over the source and drain regions. The P conductivity type well has a higher impurity concentration than the N conductivity type semiconductor substrate and the N conductivity type source and drain regions have a higher impurity concentration than the P conductivity type well. An insulation film is formed on the drain region and the insulation film, a metal electrode layer deposited on the insulation film and drain region collectively institute a capacitor.
摘要:
Provided is a semiconductor memory device comprising a pair of data input lines, a pair of data output lines, memory cells arranged in the form of a matrix, the memory cell of each column being connected between a pair of data lines, the memory cell of each row being connected to a row selection line, a memory cell selection circuit for generating column and row designation signals in order to select a desired one of said memory cells, a switching circuit disposed in each column and turned on upon receipt of a column designation signal from the memory cell selection circuit to connect the data line to a corresponding one of the data input lines, and a data detection circuit connected between the pair of data lines of each column and adapted, upon receipt of a column signal from the memory cell selection circuit, to transmit an inverted signal of a signal on the data line onto the data output line.
摘要:
A semiconductor memory device includes a memory circuit formed of a plurality of matrix-arranged memory cells, a plurality of output data lines, each of which is connected to memory cells arranged in the same column of the matrix memory circuit, and a plurality of data-sensing circuits for delivering output data from the matrix memory circuit to an output device. The data-sensing circuits are divided into a plurality of groups, and the semiconductor memory device further comprises clocked inverters whose input terminals are connected to the output terminals of the respective groups of sensing circuits and whose output terminals are connected to the output device, and a control circuit which, when one of the data-sensing circuits issues an output, supplies an energizing signal to that of the clocked inverters which is connected to said one data-sensing circuit.
摘要:
The gate of a selection transistor is connected to a word line and the source thereof is connected to a bit line. The drain of the selection transistor is connected to a storage node constituting a capacitor of thin film transistor structure. The capacitor has a plate electrode insulated from the storage node, that portion of the plate electrode which is disposed in opposition to the storage node is formed to have an impurity concentration lower than the remaining portion thereof and an inverted layer is formed in the corresponding portion according to data stored in the storage node. The plate electrode is connected to pulse generation means, a pulse signal is output from the pulse generation means in the data readout operation and the potential of the plate electrode is raised by the pulse signal.
摘要:
The gate of a transistor Q1 serving as a selection transistor is connected to a word line and the source thereof is connected to a bit line BL. The gate of a transistor Q2 serving as a cell capacitor is connected to the drain of the transistor Q1 and the drain thereof is connected to a pulse generation circuit. Whether an inverted layer is formed in the channel region of the transistor Q2 or not is determined according to the stored data. An inverted layer is formed in the channel region of the transistor Q2 having data "1" stored as storage data. The source of the transistor Q2 is connected to the gate of a transistor Q3. The drain of the transistor Q3 is connected to a pulse generation circuit 11 and the source thereof is connected to the drain of the transistor Q1. The transistor Q2 having an inverted layer formed therein is turned on when a preset voltage is supplied from the pulse generation circuit 11 in the stored data reading operation, and in this case, the transistor Q3 is turned on. Therefore, a current can be supplied to the bit line BL from the pulse generation circuit 11 via the transistor Q3 and the selected transistor Q1.
摘要:
A static random access memory has a plurality of memory cells. Each memory cell is made up of two high-resistance resistors functioning as load elements, and a flip-flop circuit. The flip-flop circuit is made up of two inverters including MOS transistors which are formed in a substrate and used as drive elements. The sources of the two MOS transistors are coupled to each other and electrically isolated from the substrate. Another MOS transistor is connected between the common source of the flip-flop MOS transistors and the source of a power-supply voltage. A MOS transistor is coupled between the common source of the MOS transistors and the source of a ground voltage. A plurality of bit lines supplies data to, and receives data from, the memory cells. A resistance element is connected between each bit line and the source of the power-supply voltage, and an output terminal outputs the voltage at one end of this resistance element. Two different voltages are applied to the sources of the two MOS transistors. One voltage is applied during normal operation of the memory and the other voltage is applied during leakage current detection testing.