摘要:
A semiconductor memory device includes, a plurality of word lines, a plurality of bit lines and a plurality of memory cells each connected between the word lines and the bit lines at each intersection of the word lines and bit lines. A plurality of sense amplifiers, each connected to each pair of bit lines, are for amplifying a difference in potential between each of the bit lines; a plurality of bit line reset circuits, each connected to each pair of the bit lines, the difference in potential being held during the read/write cycles. A transfer mode setting circuit is for optionally selecting a first word line and thereafter selecting a second word line, and for simultaneously reading out data in each memory cell connected to the first word line onto each bit line and thereafter simultaneously writing data on each bit line amplified by the sense amplifier into each corresponding memory cell connected to the second word line.
摘要:
A one-transistor one-capacitor type semiconductor memory device having a detection circuit for detecting the electric potential of a word line, to determine an appropriate timing for driving a sense amplifier, thereby improving the speed of memory operations.
摘要:
In a clock signal generating circuit for a semiconductor large scale integrated circuit, the clock signal generating circuit includes: a P-channel transistor and a first N-channel transistor, each connected in series between a positive side power source line and a ground side power source line; a second N-channel transistor connected between a common connection point of the P-channel transistor and the first N-channel transistor and a gate of the first N-channel transistor through a node, and a clock signal is applied to a gate of the second N-channel transistor. A capacitor is connected between the gate of the first N-channel transistor and a gate of the P-channel transistor; and a bootstrap capacitor is connected to the common connection point.
摘要:
A shift register having a simple circuit structure and used, for example, in a dynamic RAM device for a refresh operation. The shift register includes a plurality of circuit stages mutually connected in cascade. Each of the circuit stages includes a first transistor, for a transfer gate, which is turned on and off by a first clock signal and to which is input the output signal of the previous circuit stage. A second transistor is provided whose gate electrode is connected to the output of the first transistor, whose drain or source electrode receives a second clock signal having a different phase from the first clock signal, and whose source or drain electrode outputs an output signal. Each circuit stage also includes a reset circuit for rendering the input portion of the first transistor to a reset condition on the basis of the output signal, thereby sequentially transmitting data through each circuit stage.
摘要:
A comparator includes a first terminal, a second terminal, a first flip-flop circuit which inverts when the voltage applied to the first terminal becomes larger by .DELTA.V.sub.1 than the voltage applied to the second terminal, a third terminal, a fourth terminal, and a second flip-flop circuit which inverts when the voltage applied to the third terminal becomes smaller by .DELTA.V.sub.2 than the voltage applied to the fourth terminal. The comparator further includes a first switching circuit and a second switching circuit which, respectively, connect the first terminal and the fourth terminal to a voltage source to be compared, a third switching circuit and a fourth switching circuit which connect the second terminal and the third terminal to a reference voltage source. Also included is a fifth switching circuit which is commonly connected to the first flip-flop circuit and the second flip-flop circuit.
摘要:
A metal-insulator semiconductor dynamic memory device comprising sense amplifiers arrayed on a semiconductor substrate and column decoders. Each of the column decode being provided for a plurality of sense amplifiers and selecting one or more sense amplifiers from the plurality of sense amplifiers, the column decoders being dispersed on both sides of the arrayed sense amplifiers. A plurality of control signal lines which, in order to select the sense amplifiers, control gate elements connected between bit lines connected to the sense amplifiers and data bus lines and which are disposed on both sides of the arrayed sense amplifiers. Conducting lines are also disposed between the sense amplifiers and deliver signals from the control signal lines, for selecting sense amplifiers to the gate elements on the opposite side of the control signal lines with regard to the arrayed sense amplifiers.
摘要:
A dynamic semiconductor memory device provides a selected real cell, which is connected to a first of a pair of bit lines connected to a sense amplifier, and a dummy cell which is connected to a second of the pair of bit lines so as to perform a read-out operation. The dynamic semiconductor memory cell further provides an active restore circuit for pulling up the bit line potential of the bit line on the higher potential side of the pair of bit lines, in which the potential difference is increased by the read-out operation. The dynamic semiconductor cell can also provide a write-in circuit for charging the selected real cell through the bit line. A test power source pad is provided in the active restore circuit or the write in circuit so that when the reference level of the real cell is tested an optional power source can be applied from the test power source pad instead of from a normal power source.
摘要:
A semiconductor circuit used as a buffer circuit having an input stage circuit for receiving an input clock signal and an inverted input clock signal, a bootstrap circuit including a transistor for receiving the output of the input stage circuit and for maintaining the gate voltage of the transistor at a high level during the standby period, and an output circuit, including a transistor which is switched on and off by the output of the bootstrap circuit, for generating an output clock signal; the semiconductor circuit further comprising a current leak circuit for maintaining, during the standby period, the voltage of a point in the semiconductor circuit which is charged during the standby period at the value corresponding to the voltage of the power source, whereby the delay of the output clock signal, caused of the fluctuation by the voltage of the power supply during the standby period, is improved and then the high speed access time in the dynamic memory is carried out.
摘要:
A memory controller converts controller output signals output from a controller into memory input signals according to the operation specifications of memory chips to operate, and outputs the resultant to the memory chips through a common bus. The memory controller also receives memory output signals output from the memory chips through the common bus, and converts the received signals into controller input signals receivable to the controller. This allows the single memory controller to access the plurality of types of memory chips. As a result, the memory controller can be reduced in chip size, lowering the cost of the memory system.
摘要:
A transistor circuit includes a first high electron mobility transistor and a second high electron mobility transistor having a negative threshold voltage, wherein a source of the second high electron mobility transistor is coupled to a gate of the first high electron mobility transistor, and a gate of the second high electron mobility transistor is coupled to a source of the first high electron mobility transistor.