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| Number | Title | Issue Date |
| 5841384 | Non-linear digital-to-analog converter and related high precision current sources A digital-to-analog converter (DAC) for generating a high-precision analog output signal corresponding to a non-linear function, such as a sine function, of a digital input quantity, without the need for large numbers of precision current generators. Bina... | 11/24/1998 |
| 5828324 | Match and match address signal generation in a content addressable memory encoder A method and apparatus for encoding MATCH signal and MATCH ADDRESS signal generation for a content addressable memory ("CAM") array is disclosed. Each CAM core has an output encoder for providing a MATCH signal and, if a MATCH is determined, a MATCH-... | 10/27/1998 |
| 5706159 | Circuit interrupter including an electric arc monitoring circuit A circuit interrupter including an improved arc detection system which trips the interrupter in response to currents having frequencies and/or characteristics associated with arcing within the associated alternating current electrical system. The arc moni... | 01/06/1998 |
| 5701226 | Apparatus and method for distributing electrical power The present invention relates to an apparatus and method for distributing electrical power from power substation circuits. The apparatus of the present invention is responsive to overcurrent conditions and selectively actuates a switching network so as to... | 12/23/1997 |
| 5686916 | Multi-code-book variable length decoder A multi-code-book variable length decoder for decoding an input bit stream containing a plurality of variable length code words includes a plurality of individual variable length decoders and a controller. Each of the individual variable length decoders r... | 11/11/1997 |
| 5684485 | Multi-comparison analog-to-digital converters using the interpolation principle The disclosure concerns a so-called "auto-zeroing" comparator of two analog input voltages to be compared, and an analog-to-digital converter using a set of auto-zeroing comparators enabling the number of comparators required for an analog-to-digital conv... | 11/04/1997 |
| 5682153 | Adjust bit determining circuit A recording medium for a computer contains sectors, each of which represents a section of data that has originally been supplied by a user. As the user data is sent to the recording medium from the memory of the computer, an adjust bit determining circuit... | 10/28/1997 |
| 5677820 | Telephone and communications line overvoltage protection apparatus An overvoltage protection apparatus is used with a pair of telephone or communications TIP/A and RING/B lines including voltage clamping circuitry for clamping voltage signals on the lines at a predetermined voltage potential. The voltage clamping circuit... | 10/14/1997 |
| 5675331 | Decoding device for decoding a variety of code signals A decoding device is provided including a code FIFO memory unit for sequentially storing a bit stream, a barrel shifter for shifting and then outputting codes properly, an accumulator for computing the shift amount of the barrel shifter and issuing a requ... | 10/07/1997 |
| 5675340 | Charge-redistribution analog-to-digital converter with reduced comparator-hysteresis effects Methods and apparatus for an analog-to-digital converter (ADC) with reduced comparator-hysteresis effects. One embodiment uses a charge-redistribution ADC. One method performs an initial coarse analog-to-digital conversion to avoid overdriving an analog v... | 10/07/1997 |
| 5675336 | Analog memory unit An analog memory unit that can be implemented, at least in part, on an application specific integrated circuit (ASIC), utilizes at least the ASIC arithmetic logic unit (ALU) to enhance performance and to generate and store an accurate measure of power lin... | 10/07/1997 |
| 5673048 | Analog voltage address decoder circuit An analog voltage address decoder circuit and stackable voltage comparator circuit are provided. The address decoder circuit has a column decode comparator network made up of a first plurality of interconnected comparator circuits and a row decode compara... | 09/30/1997 |
| 5668548 | High performance variable length decoder with enhanced throughput due to tagging of the input bit stream and parallel processing of contiguous code words A high performance variable length decoder which includes a tagging circuit that tags the boundaries of code words in an incoming bit stream, providing a tag stream output and a bussed bit stream output that coincides in time with the tag stream output. T... | 09/16/1997 |
| 5663724 | 16B/20B encoder A 16-bit data block is partitioned into upper 5-bit and 3-bit sub-blocks and lower 5-bit and 3-bit sub-blocks. During a single clock cycle, a first 5B/6B encoder portion encodes the upper 5-bit sub-block to produce an upper 6-bit sub-block, a first 3B/4B ... | 09/02/1997 |
| 5663864 | Surge absorber A discharge relay electrode is located between terminal electrodes of a gap-type surge absorber. In a microgap embodiment of the invention, a conducting film on a surface of an insulating tube is split by two circumferential gaps spaced apart longitudinal... | 09/02/1997 |
| 5659313 | System and method for reducing noise during analog to digital conversion A system and method for reducing signal-to-noise ratio in a multi-component analog signal during analog to digital conversion. The multi-component analog signal is made up of a plurality of separate analog signals, with each of the separate analog signals... | 08/19/1997 |
| 5654863 | Integrated circuit having a gate oxide An integrated circuit having a gate oxide, preferably for a DMOS circuit having a protective device against electrostatic overvoltages (ESD), is to connect a limiting circuit in series with the protective device. This series circuit means that, during the... | 08/05/1997 |
| 5654862 | Method and apparatus for coupling multiple independent on-chip Vdd busses to an ESD core clamp A single clamp circuit for integrated circuits with multiple Vdd power pins by coupling the various Vdd busses to an ESD clamped Vdd bus or pseudo- Vdd bus via diodes. The diodes will provide coupling from any V... | 08/05/1997 |
| 5654703 | Parallel data compression and decompression An apparatus and method for parallel data compression and decompression uses packing and unpacking of data which has multi-variable components, for example, relational multi-variable content data such as tristimulus color space data used in color hard cop... | 08/05/1997 |
| 5650904 | Fault tolerant thermoelectric device circuit Fault tolerant thermoelectric device circuit (18) is provided including a plurality of thermoelectric elements (19, 20, 21, and 22) and a plurality of secondary by-pass circuits (24, 25, 26, and 27) coupled in parallel with a number of the thermoelectric ... | 07/22/1997 |
| 5650780 | Decoding for tri-state read-only memory A decoding method for tri-state read-only memory is disclosed herein. The cells of the tri-state memory are read the storage bits of all cells are combined to form a storage code. Each bit represents one of a first state, a second state and a third state.... | 07/22/1997 |
| 5650905 | Variable length decoder with adaptive acceleration in processing of Huffman encoded bit streams A variable length decoder with adaptive acceleration in processing of an encoded input bit stream which includes an input circuit for receiving the input bit stream and for providing a decoding window that includes a sequence of bits which include one or ... | 07/22/1997 |
| 5646622 | Analog/digital converter An analog/digital converter includes a comparator with two inputs and one output. One capacitor is connected between a reference potential and one of the inputs of the comparator. A coupling element is connected between a node point and the other of the i... | 07/08/1997 |
| 5644305 | High-efficiency encoding apparatus and high-efficiency decoding apparatus A high-efficiency encoding apparatus having a data division circuit which applies 1-dimensional scanning to the orthogonal-transformed data obtained by applying orthogonal transformation to blocked digital data in the unit of block and divides the data in... | 07/01/1997 |
| 5640158 | Reversible method of encoding data A method of reversible data compression is disclosed. The method is an improvement on the Lempel-Ziv data compression method that does not require a prefix for every noncompressed data unit in the encoded data stream. A code is inserted at the beginning o... | 06/17/1997 |
| 5638071 | Efficient architecture for correcting component mismatches and circuit nonlinearities in A/D converters An error correction technique for high-resolution analog-to-digital converters corrects for both component mismatch and circuit nonlinearity errors by utilizing look-up tables to store mismatch coefficients, which represent the errors introduced by compon... | 06/10/1997 |
| 5633635 | Method of processing code for error checking and code processing circuit A method of generating codes for error checking from a first and second types of data trains, first type of data trains having m symbols, second type of data trains having n symbols, m and n being natural numbers and m | 05/27/1997 |
| 5631799 | Fusion heat sink for integrated circuit An integrated circuit system includes an integrated circuit with a heat sink assembly including a fusible core. In the event that power dissipation by the integrated circuit threatens to exceed its safe operating range, the fusible core melts, absorbing t... | 05/20/1997 |
| 5629702 | Analog to digital converter An analog to digital converter comprises: first to nth comparators, having a tandem structure, for comparing an input voltage signal with first to nth reference voltages and outputting first to nth bit outputs respectively... | 05/13/1997 |
| 5627716 | Overcurrent protection device A microprocessor based overcurrent trip unit includes an analog circuit for monitoring phase currents in the electrical interrupting device. The analog circuit is adapted to interface with the microprocessor over a range of selectable setpoints for instan... | 05/06/1997 |
| 5627535 | Quantization apparatus A quantization apparatus for quantizing and word length limiting digitized stereo input signals including a stereo dither signal generating unit for generating stereo dither signals synthesized from at least two distinct dither signals not correlated to e... | 05/06/1997 |
| 5623262 | Multi-word variable length encoding and decoding Decoding and encoding of variable length data words and data strings is accelerated by testing for and processing more than one word or string per encoding or decoding cycle. In an encoding scheme wherein fixed length data words are encoded into variable ... | 04/22/1997 |
| 5621602 | Surge protector A surge protector includes a housing having therein a wire wound resistor and a fuse separated by a partition wall. In one embodiment for use with high density information transmission, the resistor is of very low value and preferably is 5.6 ohms. The lea... | 04/15/1997 |
| 5621599 | Switched MOV device A metal oxide varistor in series with a semiconductor switch forms a protection circuit that reduces the steady-state voltage across the metal oxide varistor during normal operation, During an overvoltage transient condition, the semiconductor switch is g... | 04/15/1997 |
| 5617284 | Power surge protection apparatus and method A power surge protection apparatus (10) protects circuitry from electrical surges induced in an alternating current power connection to the circuity. The apparatus (10) comprises first, second, and third stages (16, 17, 18), which serve to clamp and dissi... | 04/01/1997 |
| 5615074 | Electrostatic protection circuit An ESD protection circuit includes a portion for protecting a pair of power lines and a portion for protecting an input/output pin. The power line protection portion includes at least three SCRs electrically connected in series between the power lines. A ... | 03/25/1997 |
| 5612846 | Electrical connector interface An electrical connector interface (10) provides for voltage surge protection. The connector interface (10) includes electrical interface conductors (12), an electrical ground conductor (14), and a selectively conductive material (18). The ground conductor... | 03/18/1997 |
| 5610606 | 1-bit D/A conversion circuit A 1-bit D/A conversion circuit according to the present invention comprises an RZ signal generating circuit and a PRZ signal generating circuit. The RZ signal generating circuit receives 1-bit digital data sampled at a predetermined frequency, converts th... | 03/11/1997 |
| 5600525 | ESD protection circuit for integrated circuit An ESD protection circuit includes a portion for protecting a pair of power lines and a portion for protecting an I/O pin. The power line protection portion includes at least three SCRs electrically connected in series between the power lines. A zener dio... | 02/04/1997 |
| 5600528 | Heater cut off circuit and method A safety device for heated sensors. A signal representing a threshold voltage is compared with a signal from the sensor representing sensor temperature. If the latter is greater than the threshold signal, a switch is opened to remove power from the means ... | 02/04/1997 |
