Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4442481 | Low power decoder circuit A system is disclosed to charge an output region to a selected voltage in a series of steps, each step raising the voltage of the output region by an amount less than the desired final voltage level. A portion of the system having a control terminal cause... | 04/10/1984 |
| 4441172 | Semiconductor memory core program control circuit A circuit to restrain the rise time of a programming pulse generated in an electrically alterable read-only semiconductor memory in which excessively sudden changes in the pulse are capacitively coupled, through active devices that can be built on the chi... | 04/03/1984 |
| 4433390 | Power processing reset system for a microprocessor responding to sudden deregulation of a voltage A power processing circuit operatively and electrically connected to one regulated supply (16) voltage responds through a comparator means (24) and a monitor means (26) to generate a reset pulse (84) to a microprocessor (28) whenever the regulated supply ... | 02/21/1984 |
| 4432076 | Bipolar static semiconductor memory device with a high cell holding margin This invention relates to a bipolar static type semiconductor memory device which reduces the influence of disturbances on the memory cells of non-selected chips and thereby obtains a large memory holding margin for the memory cells. The semiconductor mem... | 02/14/1984 |
| 4428071 | Integrated circuit having non-volatile programmable semiconductor memories A circuit arrangement is provided to supervise the supply voltage of the programming logic of a non-volatile integrated circuit comprising insulated-gate field-effect transistors whose threshold voltages are altered by the programming logic and whose gate... | 01/24/1984 |
| 4422162 | Non-dissipative memory system A memory system is used to store data and is powered-up by and only during accessing signals, thus using essentially no current when not being accessed. The memory system includes a decoding network using a mixture of NPN and PNP transistors, and a buffer... | 12/20/1983 |
| 4420823 | Semiconductor memory A static semiconductor memory having a plurality of memory cells respectively connected to word lines and connected in parallel to bit line pairs and having a power-down function, is provided with a coupling noise canceller connected to a data bus which i... | 12/13/1983 |
| 4419745 | Semiconductor memory device An improvement of a semiconductor integrated circuit device of a memory cell array which is formed by integrated injection logic memory cells. The semiconductor integrated circuit includes integration injection logic memory cells which are arranged in mat... | 12/06/1983 |
| 4415993 | Fast access non-volatile memory A memory apparatus having a row and column decoder for controlling the read and write function to a transistor memory pair. A single power/chip select pad is utilized to both power the memory and select the memory chip. External control signals are applie... | 11/15/1983 |
| 4409677 | Semiconductor integrated circuit device A semiconductor integrated circuit device includes a circuit for supplying a reference voltage which is generated in a reference voltage generator circuit to plural load circuits. A plurality of noise limiters have one end commonly connected to the output... | 10/11/1983 |
| 4409678 | Semiconductor memory device Disclosed is a semiconductor memory device which comprises a sense amplifier formed on a semiconductor substrate, paired bit lines connected to the sense amplifier and memory cells connected to the bit lines wherein a predetermined bias voltage is applied... | 10/11/1983 |
| 4405868 | Write/restore/erase signal generator for volatile/non-volatile memory system A signal generator for producing, from a low voltage power supply, relatively large magnitude pulse signals of opposite polarity to a device input terminal having a parallel resistor-capacitor circuit connection to a reference voltage. A voltage multiplie... | 09/20/1983 |
| 4400802 | Integrated digital semiconductor circuit Integrated digital semiconductor circuit, including a plurality of inputs, a common constant-current source for selectively supplying the inputs, the inputs being operable in a "1" logic level state and a "0" logic level state, internal switching means fo... | 08/23/1983 |
| 4393481 | Nonvolatile static random access memory system Nonvolatile, integrated metal-oxide semiconductor random access memory systems utilizing integrated floating gate circuit elements, and integrated means for the generation and control of high voltages in the provision of self-contained, nonvolatile electr... | 07/12/1983 |
| 4388706 | Memory protection arrangement A memory protection arrangement particularly suitable for use with battery backed-up CMOS RAMs. The voltage level of power to the CMOS RAMs is referenced to the logic supply to eliminate latch-up and low voltage problems and to relax the tolerances requir... | 06/14/1983 |
| 4375663 | Power failure early warning circuit for microprocessor with CMOS RAM memory A circuit for preventing data transfers to a RAM by a microprocessor when primary ac power fails also puts the RAM in standby after a period adequate to complete any data transfer started. The sequence is provided by providing a first signal to the microp... | 03/01/1983 |
| 4368524 | Semiconductor device A semiconductor device for comprising electrically alterable read-only memories formed in and on the same silicon substrate is disclosed. The read-only memories are driven by both a first voltage having one polarity and a second voltage having the opposit... | 01/11/1983 |
| 4330842 | Valid memory address pin elimination A digital data processor on a single monolithic integrated circuit chip is provided which uses one less pin. The elimination of the pin is accomplished by using, internally to the processor, a valid memory address signal to gate information from the addre... | 05/18/1982 |
| 4321489 | Voltage detection circuit A voltage detection circuit, for detecting two voltages, that is, a high voltage level and a low voltage level, is disclosed. The voltage detection circuit according to the present invention includes a load element group having a first terminal and a seco... | 03/23/1982 |
| 4320386 | Selection and power reset circuit A plurality of memory circuits and a microprocessor are used for programming. A circuit is provided for selecting and powering one memory circuit and for resetting the microprocessor each time a new memory circuit is selected. The circuit includes a multi... | 03/16/1982 |
| 4310900 | Memory device with different read and write power levels A memory device in which an information can be easily written without failure is disclosed. The memory device comprises means for supplying a memory cells with a first voltage as a power supply thereto when a read operation is performed and means for supp... | 01/12/1982 |
| 4310898 | Minimum magnetic bubble driving circuits for multiple coils The driving circuit for supplying current to coils for generating a rotating magnetic field is divided into a switch side circuit and a driver side circuit so as to pass current through only one of the coils. Each of the switch side circuit and the driver... | 01/12/1982 |
| 4295210 | Power supply system for monolithic cells A power-supply system for use in a monolithic memory characterized in that the power dissipation of the memory is reduced. Each word line is connected to a current switch circuit comprised of a first transistor the collector of which is connected to a vol... | 10/13/1981 |
| 4279020 | Power supply circuit for a data processor In order to extend battery life when batteries are used and to conserve energy when commercial power is used, it is highly desirable that power not be applied to a data processor when it is not operating. A power supply in accordance with the present inve... | 07/14/1981 |
| 4259729 | Dynamic memory A memory stable against variation of an external supply voltage is disclosed. The memory comprises a plurality of memory cells, each of memory cells including an insulated-gate field-effect transistor having a gate coupled to a word line, a source and a d... | 03/31/1981 |
| 4247913 | Protection circuit for storage of volatile data A protected memory circuit for use with an electronic data system includes a memory element such as a shift register, and memory control or lock means to selectively control enablement of the memory element for read/write operations. A separate power supp... | 01/27/1981 |
| 4233672 | High-speed semiconductor device A CMOS semiconductor memory device in which a memory cell array and peripheral circuits are formed on the same semiconductor substrate. Wells of the peripheral circuits with MOS transistors of one channel type formed therein are supplied with a PN junctio... | 11/11/1980 |
| 4233666 | Drive power sequencing In a digital information storage system or the like, start up power sequencing for independently operable machines such as disk drives each equipped with a microprocessing unit is provided through a simplified power sequencing circuit. The power sequencin... | 11/11/1980 |
| 4231109 | Semiconductor integrated circuit device An improved semiconductor integrated circuit device having an array of integrated injection logic memory cells arranged in matrix form, with word and bit lines connected to the memory cells arranged in lines. The second word line is formed by a semiconduc... | 10/28/1980 |
| 4231108 | Semiconductor integrated circuit device An improved semiconductor integrated circuit device having a memory cell array formed of integrated injection logic memory cells. The semiconductor integrated circuit according to the present invention includes integration injection logic memory cells whi... | 10/28/1980 |
| 4198698 | Chip select power-down control circuitry Circuitry responsive to a memory chip de-select signal for very rapidly decoupling the memory from its peripheral circuits and for turning off all unnecessary power and, upon occurrence of a chip select signal, for rapidly restoring power and then recoupl... | 04/15/1980 |
| 4148099 | Memory device having a minimum number of pins A circuit for reducing the number of external pins or terminals on a memory device includes a counter circuit which periodically causes the signal on a first external pin to be provided to the power terminal of an internal power supply within the memory d... | 04/03/1979 |
| 4145761 | Ram retention during power up and power down A RAM being powered by a standby voltage supply and having control circuitry to save all or a portion of the information stored in the RAM during power up and power down is provided. A latch is used to hold an input signal just prior to power down to just... | 03/20/1979 |
| 4145760 | Memory device having a reduced number of pins A memory device includes a circuit for reducing the number of pins or external terminals on the memory device. A threshold detector within the circuit detects the difference in voltage between signals applied at two external pins. A clocking signal at one... | 03/20/1979 |
| 4130899 | System for operating volatile memory in normal and standby modes A system including first drivers (such as TTL drivers) operatively connected to the control lines of a volatile memory for providing control and refresh functions to the memory in a normal mode, and second drivers (such as CMOS drivers) operatively connec... | 12/19/1978 |
| 4094012 | Electrically programmable MOS read-only memory with isolated decoders A programmable and erasable MOS read-only memory employing floating gate memory cells. Unique, compact decoders allow the high voltage programming signal to be fully decoded without exposing the decoding transistors to the high voltage. The memory employs... | 06/06/1978 |
| 3983420 | Signal generator circuit A signal generator circuit which assumes a certain prescribed value upon closure of a power supply and which is inverted upon lapse of a predetermined time after the closure of the power supply, comprising first and second flip-flops adapted to be firstly... | 09/28/1976 |
