摘要:
A semiconductor integrated circuit (IC) device includes therein a test circuit. The test circuit operates to distinguish the power source level during the testing or ground level occurring at an internal node located inside the semiconductor chip. The test circuit includes a series-connected MIS transistor and an MIS diode. The gate of the MIS transistor is connected to the internal node. The MIS diode is connected to an external input/output (I/O) pin. The level at the internal node, i.e., the power source level or the ground level, can be distinguished by a first voltage level or a second voltage level applied to the external I/O pin, whichever enables a current to be drawn from the external I/O pin.
摘要:
A semiconductor circuit for driving a clock signal line comprising a first circuit for pulling up the potential of the clock signal line to the source voltage and a second circuit for pulling down the potential of the clock signal line to a lower voltage. A capacitor is connected to the clock signal line for receiving a potential push signal and pushing the potential of the clock signal line higher than the source voltage. The capacitor performs the function of capacitance only after the potential of the clock signal line is raised to the source voltage. The operational speed of a dynamic memory device associated with the semiconductor device is then enhanced.
摘要:
A buffer circuit comprises a flip-flop which is receives an external input via a first input circuit and a reference voltage via a second input circuit. Internal complementary outputs are then produced via an output circuit. The flip-flop cooperates with at least one level setting device by way of a second input circuit. The level setting device functions to produce a voltage level to deactivate the second input circuit during activation of the flip-flop.
摘要:
An address buffer for a dynamic memory includes a flip-flop. The flip-flop is coupled at its one input/output terminal with both a first input circuit and a third input circuit connected in parallel with each other and at its other input/output terminal with a second input circuit. The second input circuit receives a reference voltage and is activated by an external address timing clock during a normal operation mode. The first input circuit is also activated by the external address timing clock, but receives an external address. The third input circuit receives an internal refresh address and is activated by an internal refresh address. The address buffer cooperates with a switcher which produces the internal refresh address timing clock and the external address timing clock, alternatively, by switching a basic timing clock generated by an address drive clock generator.
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:
In a semiconductor device having a signal line on which a voltage higher than the voltage supply is generated, a conductive layer following the potential variance of the voltage supply is positioned under an insulating film directly below the signal line in order to make the level of the signal line follow the potential variance of the voltage supply.
摘要:
An active pull-up circuit for use in a sense amplifier or the like, comprises an enhancement type MIS transistor, a MIS capacitor controlled by a clock signal, and a depletion type MIS transistor controlled by another clock signal (.phi..sub.2 '). In this circuit, the two clock signals are bilevel signals having potentials which are the same as potentials of two power supplies.
摘要:
A semiconductor memory device operates under a so-called address multiplex access method. A row part of the device is enabled by receiving a row address strobe (RAS) signal. A column part of the device is enabled by simultaneously receiving both a column address strobe (CAS) signal and a timing control signal supplied from the row part during its enable state. A column address buffer in the column part is enabled by simultaneously receiving both the CAS signal and a timing control signal. The timing control signal is produced from a circuit when it detects and holds the RAS signal.
摘要:
A dynamic semiconductor memory device having a refresh-address generator, includes an initial resetting circuit for resetting the output signals of a refresh-address counter when the power supply is turned on, thereby eliminating the need for counter checking procedures prior to the examination of the refresh-address generator.
摘要:
A semiconductor memory device having flip-flop circuits, in which first and second bit lines are connected to each of the flip-flop circuits as a sense amplifier, the potential of the second bit line being opposite to the potential of the first bit line, and the first and second data bus lines cross perpendicularly to the first and second bit lines, respectively, the first and second dummy lines are arranged in parallel with the first and second data bus lines respectively, in order to prevent erroneous operation of an I/O amplifier connected to the first and second data bus lines.