摘要:
A nonvolatile memory in which at least one power supply element is carried with an integrated circuit chip containing the memory and connected to power supply terminals of the integrated circuit chip having a memory cell array in which a plurality of memory elements or memory circuits are arrayed.
摘要:
A semiconductor memory is provided with automatic refresh means including a timer, a refresh counter and a refresh buffer each formed on a semiconductor chip mounted with an asynchronous memory, for automatically performing a periodic refresh operation on the basis of a basic clock signal which is generated in response to the detection of a logical change in the output of the refresh counter. The automatic refresh counter includes means for performing one of a read operation and a write operation which are based upon a regular address signal asynchronous with the periodic refresh operation, in preference to the periodic refresh operation.
摘要:
A semiconductor memory using a dynamic memory device, wherein a battery supplies a power source voltage and a substrate bias voltage when the memory is cut off from an external device, and a refresh control circuit changes in refresh timing of the memory device in accordance with the leakage current of the memory device. The power consumption of the memory can thus be reduced and the data can be kept for an extended period without an external power source.
摘要:
A semiconductor memory device having a memory plane defined by a plurality of memory cells, a decoder line for accessing the memory cells, a common data line on which a signal output from an accessed memory cell is collected, and a sense amplifier for amplifying the signal collected on the common data line. The sense amplifier has an amplifying circuit portion which is composed of a pair of common-collector type bipolar transistors supplied with the signal collected on the common data line as a differential input, and a plurality of MOS transistors for converting a change in current into a change in voltage. Each of the MOS transistors has a lightly-doped drain structure.
摘要:
An enhancement-type and a depletion-type metal-insulator-semiconductor field effect transistor are formed on a common substrate of silicon and are electrically isolated from each other by a plurality of layers including, for example, a first layer of SiO.sub.2, a second layer of Al.sub.2 O.sub.3 capable of inducing holes in the surface portion of the substrate, and a third layer of SiO.sub.2, and the relation between the thicknesses of these layers is suitably selected for attaining the satisfactory isolation between these transistors.
摘要:
A CMOS IC is formed on a semiconductor crystalline surface having a plane azimuth (110) or (023), or of a plane azimuth close thereto (plane azimuth substantially in parallel with the above-mentioned planes), in order to increase the speed of operation.At low temperatures, dependency of the carrier mobility upon the plane azimuth becomes more conspicuous as shown in FIG. 1, and the difference of mobility is amplified depending upon the planes. Therefore, employment of the above-mentioned crystalline planes helps produce a great effect when the CMOS device is to be operated at low temperature (e.g., 100.degree. K. or lower), and helps operate the device at high speeds.
摘要:
In a semiconductor integrated circuit having polycrystalline silicon interconnections and metal interconnections, a low resistance layer, containing impurities to a high concentration for the polycrystalline silicon interconnections, is formed in predetermined parts of an undoped polycrystalline silicon layer which is deposited on a first insulator film on a semiconductor substrate, a second insulator film is deposited on the polycrystalline silicon layer under the state under which the undoped parts are left at least around through-holes to be formed, and the metal interconnections at least parts of which run in a direction intersecting the polycrystalline silicon interconnections are provided on the second insulator film, the necessary contacts between the metal interconnections and the polycrystalline silicon interconnections being made through the through-holes provided in the second insulator film in correspondence with the intersecting parts of both the interconnections.
摘要:
In a digital information system for realizing the sale of information or the like having a commercial value in the form of a digital signal, and an audio processor, and signal processor suitably used with the system, when a digital signal is received/delivered, a digital signal source is connected directly to a player for receiving and storing a specified information, which is reproduced by the player independently. A voice interval of a digital audio signal is processed to realize the slow and fast playback. The system includes a data compressor and a data extender of simple configuration. The value of the digital signal received/delivered can be exhibited directly. A selling system is constructed easily, and the player is simple in configuration and easy to operate by anyone. The fast and slow playback are possible without deteriorating the sound quality, and ripples can be greatly reduced against the digital input signal, thereby making possible a faithful data compression of an acoustic signal or the like by a simple configuration. The self-diagnosis function permits the use of a defective memory chip, thereby leading to a very economical system.
摘要:
In a defect relieving technology which replaces defective memory cells of a semiconductor memory device by spare memory cells, use is made of an associative memory. Address information of a defective memory cell is stored as a reference data of the associative memory, and new address information of a spare memory cell is written down as output data of the associative memory. A variety of improvements are made to the associative memory. For instance, a plurality of coincidence detection signal lines of the associative memory are divided into at least two groups, and one group among them is selected by switching means. Reference data of the associative memory comprises three values consisting of binary information of "0" and "1", and don't care value "X". The associative memory further includes a plurality of electrically programable non-volatile semiconductor memory elements.
摘要:
Electric charge is supplied to a circuit node being in a charge storing state within a signal processor in response to a signal-processing commencing signal. The processor is operated in a low-temperature range, for example, in the range of temperature below 200K. By this structure, a leakage current is reduced, a high degree of integration equivalent to that of a dynamic circuit can be obtained, and the simplicity of a static circuit not requiring any complicated internal/external timing signals can be realized.