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6091658 Nonvolatile memory implementation for electronic devices  
An automobile has an electronic device with a nonvolatile memory implementation. The electronic device includes non-programmable nonvolatile memory (ROM), volatile memory (RAM) and programmable...
6088762 Power failure mode for a memory controller  
A power failure mode for a memory controller, such as a memory controller used in an input/output processor, which, when the memory controller has system power, refreshes a memory unit, such as an...
6084813 Apparatus and method for controlling memory backup using main power supply and backup power supply  
In a system using a clock synchronous type synchronous DRAM (SDRAM), when a power supply voltage monitoring circuit informs a timing circuit of a decrease in voltage from a main power supply, the...
6078537 Semiconductor circuit, in particular for use in an integrated module  
A semiconductor circuit, in particular for use in an integrated module, has at least one operational assembly with a drive circuit, such as a microprocessor, and a data memory. The semiconductor...
6070804 Non-contact IC card with monitor for source power  
A non-contact type IC card includes a rectifier circuit for supplying a source voltage to respective circuits of an IC card based on the strength of radio waves received from a host computer. A...
6064590 Non-volatile static random access memory device  
A non-volatile static random access memory device configured by adding a floating gate type metal oxide semiconductor device to an SRAM including a pair of access elements respectively switched on...
6049499 Shared electrical supply line for a semiconductor storage device  
To reduce both the noise level according to separation or short-circuitng of the electrical supply line of the sense amplifiers and the electrical supply line of the word line driving circuit and...
6046954 Circuit for controlling internal voltage for output buffer of semiconductor memory device and method therefor  
In a semiconductor memory device, a plurality of output buffers, one for each output data bit, are powered by an internal voltage control circuit so as to provide high speed operation yet minimize...
6044443 Portable computer with memory management system and method for prolonging the lifetime of internal battery  
A memory management method for use in a portable computer to prolong the lifetime of an internal battery in the portable computer. The portable computer includes a non-volatile memory storage...
6041414 Uninterruptible power supply apparatus which supplies guaranteed power to electronic apparatuses in a system  
A plurality of output terminals from which the power from an uninterruptible power supply apparatus is supplied. A timing holding unit holds timing information of power supply start and/or stop of...
6038190 Electrically erasable and programmable non-volatile memory protected against power supply failure  
To reduce the risks of erroneous data writing into an electrically erasable and programmable non-volatile memory (10) (EEPROM) when a failure in the memory (10) voltage supply (Vcc) occurs during a...
6031782 Semiconductor memory device provided with an interface circuit consuming a reduced amount of current consumption  
A clock buffer in a semiconductor memory device includes two kinds of interface circuits, i.e., an LVTTL interface and an SSTL interface. When the semiconductor memory device is set to a specific...
6002619 Memory with read protected zones  
The invention relates to memories associated with the central processing units of microcomputers and more particularly, in such memories, to an architecture and device used to protect certain zones...
6002604 Smart five volt generator operable from different power supply voltages  
A 5V generator circuit is disclosed that generates a reliable 5V signal for use in integrated circuits from the available VPP or VCC supplies for a wide range of VPP and VCC voltages. When VCC is...
5986962 Internal shadow latch  
An integrated circuit implements simple and efficient normal power to low power and low power to normal power transitions. Dedicated shadow latch circuits are added, each having a corresponding...
5977815 Integrated CMOS circuit  
A CMOS circuit (10), which is integrated in a semiconductor substrate, comprises a principal circuit part (12), which includes the major part of the circuit components in a well isolated from the...
5973968 Apparatus and method for write protecting a programmable memory  
An apparatus and method for protecting memory content of a programmable memory is disclosed. A programmable memory, such as a random access memory (RAM), is configured to include a write protected...
5970009 Reduced stand by power consumption in a DRAM  
Reduced current consumption in a DRAM during standby mode is achieved by switching off the power source that is connected to, for example, the n-well.
5963490 Static semiconductor memory device having a variable power supply voltage applied to a memory cell depending on the state in use and method of testing the same  
In carrying out testing, the potential of the node N1 of the state change detect circuit attains high level. This allows the power supply voltage supply line to receive a voltage down-converted by...
5959926 Programmable power supply systems and methods providing a write protected memory having multiple interface capability  
A programmable power controller controls power between a primary power source and a secondary power source and powering first circuitry. The primary power source has a first voltage and the...
5943257 Ferroelectric memory device and data protection method thereof  
A nonvolatile ferroelectric semiconductor random access memory device and a method for protecting ferroelectric memory cell capacitors from data damage are provided. The contents of the FRAM cells...
5933364 Semiconductor device with a metal layer for supplying a predetermined potential to a memory cell section  
A semiconductor device according to the present invention includes: a semiconductor chip; and memory and logic sections formed on the semiconductor chip. The memory section includes: an array of...
5930192 Memory backup circuit and memory backup method  
A change over unit 12 is controlled to become conductive only when useful data is stored in a memory 15 for storing data to be processed. Therefore, when a main power supply is shut off, a memory...
5915118 Apparatus and method for gradually shutting down a power supply  
An uninterruptive power supply supplies electric power to a computer by use of a battery when the supply of electric power by a main power supply is interrupted. The system termination processing...
5903914 Memory access limiter for random access dynamic memories  
A memory access limiter for random access dynamic memory of data processing systems formed by several modules which can be independently activated in partial temporal superimposition, each by a...
5901096 Semiconductor memory device capable of disconnecting an internal booster power supply from a selected word line in response to a test signal and testing method therefor  
There is provided disconnecting circuit for disconnecting an internal boosted power supply from a word line. At the time of testing, one of a plurality of word lines is selected therefrom and data...
5892705 Apparatus for maintaining non-volatility in ferroelectric ramdom access memory and method therefor  
An apparatus and method for maintaining non-volatility in a ferroelectric random access memory (FRAM), in which recorded information is maintained during a power failure, are provided. The...
5892735 Electronic apparatus and method for measuring cumulative power-on time of an electronic device  
An electronic apparatus for measuring cumulative power-on time of an electronic device is provided with: a capability of measuring the power-on time of the device; a nonvolatile memory having at...
5889721 Method and apparatus for operating functions relating to memory and/or applications that employ memory in accordance with available power  
A programmable memory device includes circuits that permit the selective disabling of certain functions when a battery supply voltage falls below the point necessary to sustain those functions...
5884084 Circuit and method for using early reset to prevent CMOS corruption with advanced power supplies  
The reset circuit including a logic gate coupled to an electrical component containing the CMOS memory. The logic gate includes an output and at least a first and second inputs. The first input is...
5883847 Semiconductor memory device capable of reducing power supply noise caused by output data therefrom  
A semiconductor device reduces power supply noise during read operations of a memory device. The semiconductor device includes a plurality of read circuits, a plurality of control circuits and a...
5880523 Anti-tamper integrated circuit  
An anti-tamper integrated circuit (IC) apparatus is adapted for use with an IC that carries an active component, such as a secure processor, which requires a constant power signal to operate. If...
5867443 Shared bitline heterogeneous memory  
A five-transistor static Random Access Memory (SRAM) cell accessed by a single bitline merged with heterogeneous memories, such as ROMs, EPROMs, EEPROMs, and DRAMs. Combined ROM and RAM cells have...
5856937 Processor module with dual-bank SRAM cache having shared capacitors and R-C elements integrated into the module substrate  
A processor module has a cache of SRAM chips mounted on both a back and a front surface but de-coupling capacitors mounted on only the back surface. Each de-coupling capacitor is for suppressing...
5856951 Semiconductor memory device with an improved hierarchical power supply line configuration  
In a semiconductor integrated circuit device, a voltage setting circuit for setting a voltage level on the sub power source voltage line according to a reference voltage from a reference voltage...
5852737 Method and apparatus for operating digital static CMOS components in a very low voltage mode during power-down  
A static CMOS component is operated in a power-down state at the lowest possible voltage that maintains register and internal state levels of the component. A method of operating the static CMOS...
5847577 DRAM memory cell for programmable logic devices  
A plurality of DRAM cells are used to store the state of the programmable points in a programmable logical device (e.g., a field programmable gate array or FPGA). An individual DRAM cell is used in...
5841686 Dual-bank memory module with shared capacitors and R-C elements integrated into the module substrate  
A memory module has DRAM chips mounted on both a front and a back surface but decoupling capacitors mounted on only the front surface. Each decoupling capacitor is for suppressing current spikes...
5835706 Method of controlling data writing into on-board microcomputer  
A user board has an on-board microcomputer including a flash memory and an on-board writing program memory, a user circuit, a reset circuit, a first OR gate, and a second OR gate. A detected signal...
5831347 Apparatus for determining if the duration of a power failure exceeded predetermined limits  
In an electronic instrument subject to power line interruptions and having a standby power supply, an external timer is used to time a predetermined brief period (e.g. 15 seconds to 1 minute). If...
5828611 Semiconductor memory device having internal voltage booster circuit coupled to bit line charging/equalizing circuit  
An equalizing circuit is connected between a pair of bit lines. The equalizing circuit is made up of three MOS transistors and an equalization control signal is supplied to the gates of the MOS...
5822257 Semiconductor memory device capable of relieving fixed-failure memory cells and refresh-failure memory cells  
A memory device has a plurality of word lines, a plurality of bit lines crossing the word lines, and a memory cell array having memory cells disposed at respective points of intersection between...
5818755 Storage apparatus having a nonvolatile storage device capable of retaining data after an incomplete write operation and method of accessing same  
A storage region formed of a nonvolatile storage device is divided into two blocks; block `0` and block `1`. In a process for writing data, the magic Nos. of the blocks `0` and `1` are checked. On...
5796670 Nonvolatile dynamic random access memory device  
A nonvolatile memory cell for a random access memory device is provided. The invented memory cells are similar in configuration to the memory cells of known DRAM devices, so that DRAM devices...
5784629 System and method for conserving power within a backup battery device  
A system and method for conserving power within a backup battery device comprises a main battery for generating a main operating voltage and a secondary operating voltage, a switching device for...
5781784 Dynamic power management of solid state memories  
A dynamic power management device for supplying power to a solid state memory integrated circuit includes power control circuitry for supplying a variable voltage to the memory integrated circuit...
5768208 Fail safe non-volatile memory programming system and method therefor  
The present invention relates to a fail safe non-volatile memory programming system. The system uses a high voltage charging capacitor to store a charge for programming a memory device. A second...
5768213 Clock generating circuit for use in semiconductor memory device  
In a semiconductor memory integrated circuit device, power consumption and clock noise are reduced by providing a plurality of separately controlled internal clock signal generators. All of the...
5767647 Non-volatile memory controlling apparatus and applications of the same to electronic computer peripheral equipment  
A control apparatus for a non-volatile memory and applications of the control apparatus to electronic computer peripheral equipments are disclosed. For example, a NOVRAM (non-volatile static random...
5761144 Memory card  
A memory card includes a volatile memory device, and a power supply supplying an electric voltage to the memory device while the memory card is connected to a host. A timer is started when the...
Matches 201 - 250 out of 573 < 1 2 3 4 5 6 7 8 9 10 11 12 >