摘要:
A semiconductor memory device is connected to a power source and includes a reference potential line connected to receive a reference potential from the power source. An input circuit is connected to the reference potential line and receives an external input signal having a logic level defined in reference to the reference potential to be supplied to the source potential line. The output circuit has an external output terminal which is connected to the reference potential line. The output circuit is for generating an output to the external output terminal. An inhibiting circuit inhibits a response to the external input signal of the input circuit for a predetermined period during which the output of the output circuit changes.
摘要:
A semiconductor memory device has an operational mode such as a nibble mode or page mode, a first address strobe signal is kept in an active state, and a second address strobe signal is successively switched between an active state and standby state, thereby enabling successive data output. Previous output data is reset once, in accordance with the switchover of the second address strobe signal to the active state while the first address strobe signal is in the active state, before outputting data, and the reset operation for outputting is also performed when both the first and second address strobe signals are switched to the standby state, so that the period in which the data is output is expanded.
摘要:
In a semiconductor memory device including an output buffer circuit receiving data signals read out from a memory cell array, an output stage MOS transistor being turned ON and OFF according to the output signals of the output buffer circuit, and an output buffer enable (OBE) signal generator circuit for generating an OBE signal which is used as the voltage supply to the output stage of the output buffer circuit, a V.sub.BS voltage generator circuit is provided for generating a voltage V.sub.BS higher than the voltage source V.sub.CC preceding the rising up of the OBE signal, which voltage V.sub.BS is used as a voltage supply to the output stage of the OBE signal generator circuit, whereby the OBE signal is formed as a voltage waveform which rises rapidly up to a level higher than the voltage source V.sub.CC.
摘要:
An address buffer circuit for comverting an address signal (A.sub.i) of a TTL level into an address signal (A) of a MOS level an its inverted signal (A) comprising: a pre-amplifier (P-AMP) for receiving the address signal having a TTL level; a main amplifier (M-AMP) comprising a flip-flop (FF.sub.3), a circuit for defining the operation of the flip-flop (FF.sub.3); and an output circuit (OUT) comprised of another flip-flop (FF.sub.4) for producing the address signals of a MOS level. In the pre-amplifier, a depletion type transistor (Q.sub.34) is used as a reference constant current source, which is independent of a power supply voltage (V.sub.DD), for the two values of the address signal of a TTL level.
摘要:
An integrated semiconductor memory device is formed on a semiconductor substrate of one conductivity type on which there are provided peripheral circuits consisting of a pluality of memory cells each containing a storage capacitor and an IG FET. The IG FET in each memory cell acts as a transfer gate which is disposed on a surface region having the same conductivity type as that of the substrate and higher impurity concentrations than that of the substrate. The transfer gate has a gate threshold value which is higher than that of the IG FET in the peripheral circuits and which is insensitive to a noise pulse supplied thereto, whereby the destruction of data by noise pulse can be effectively prevented.
摘要:
The object of the present invention is to provide, as a solid preparation for making it easy to take, thus improving patient's compliance etc., an intraorally rapidly disintegrating tablet which can be produced easily without any particular problem by a usual method of producing tablets with a usual tabletting machine, has practically unproblematic hardness, and disintegrate rapidly in the oral cavity. This tablet is produced by tabletting cores coated with a pharmaceutical disintegrating agent, wherein the core is a granule containing a water-soluble medicament or containing a medicament and a sugar.
摘要:
A dynamic semiconductor memory device comprising a plurality of memory blocks each including a sense amplifier array and a pair of memory cell groups, a row decoder for selecting a row line within the plurality of memory blocks, a column decoder which is common to the plurality of memory blocks and which selectively connects a sense amplifier in each of the memory blocks to a corresponding one of the pairs of bus lines. The device also includes row block decoders which selectively enable the sense amplifier array of one of the memory blocks according to block selecting address signals, and block bus line decoders which selectively connect the pair of bus lines of each of the memory blocks to a pair of data buses according to the block selecting address signals.
摘要:
A semiconductor device with an expanded range of a recommended condition for an input voltage is disclosed. In embodiment, the semiconductor device having input protection on an input terminal thereto, includes: a semiconductor region having a first conducting type, first and second diffusion regions defined in the semiconductor region and respectively having a second conducting type, and a transistor formed by using the semiconductor region as a base, the first diffusion region as a collector, and the second diffusion region as an emitter. The first diffusion region is connected to one of a high-potential power supply and a low-potential power supply, the second diffusion region is connected to the input terminal, and the semiconductor region is connected to another power supply having a voltage high enough to reverse bias the junction between the semiconductor region and the first diffusion region.
摘要:
A semiconductor device has a substrate of a first conductivity type including a well of a second conductivity type opposite to the first conductivity type. The semiconductor device comprises a bias potential generating circuit for generating a potential in the substrate or the well; a potential detecting circuit for detecting a potential of the substrate or the well and a gate circuit. The gate circuit is connected to the potential detecting circuit and to an internal circuit and applies an enable signal to the internal circuit in accordance with the detected potential of the substrate or the well. Consequently, latch-up of parasitic transistors in a CMIS-inverter circuit of the semiconductor device can be prevented.
摘要:
A semiconductor integrated circuit including a memory unit for storing address information of a failed circuit portion and for replacing the failed circuit portion by a redundant circuit portion. The semiconductor integrated circuit provides a comparison unit for detecting coincidence between data read from the memory unit and a received input address. Data produced from the comparison by the comparison unit is delivered through an external connection terminal.