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1
US6232884B1
Remotely operable vehicle disabling system
Publication/Patent Number: US6232884B1 Publication Date: 2001-05-15 Application Number: 09/081,473 Filing Date: 1998-05-19 Inventor: Gabbard, Charles H.   Assignee: Gabbard, Charles H.   IPC: G08C1900 Abstract: A remotely operable vehicle disabling system for terminating operation of a vehicle. The system has a remotely operable transmit unit for transmitting a command shutdown message to a command-receiver vehicle unit in a vehicle. The vehicle unit is in communication with at least one operational component and capable of shutting down that component to thereby terminate vehicle operation. The transmit unit can initially transmit a query message prior to the shutdown message to confirm vehicle identity or to confirm the presence of the vehicle disabling system. Correspondingly, the vehicle unit is capable of receiving both the query message and the shutdown message and of responding to the query message, with all such communication activities preferably being encoded with a continuously changing key. The disabling system provides a safe and efficient manner for law enforcement personnel to apprehend criminals attempting to escape in vehicles.
2
US6232885B1
Electricity meter
Publication/Patent Number: US6232885B1 Publication Date: 2001-05-15 Application Number: 09/172,822 Filing Date: 1998-10-15 Inventor: Ridenour, Ronald E.   Swanson, Scott   Assignee: Schlumberger Resource Management Services, Inc.   IPC: G08C1936 Abstract: A meter for measuring electricity usage for a given load includes a housing and two light sources disposed in the housing and configured to output light at a predetermined frequency. Two light receivers are disposed in the housing so that a light path is defined between each light source and its respective light receiver. Each light receiver is configured to receive the light from its light source and to output a signal responsively thereto. A rotatable member is disposed in the housing in the light paths and is rotatable responsively to the electricity usage. The member has a first portion and a second portion. The first portion transmits incident light while the second portion blocks light. The first portion and the second portion are defined on the member so that the member modulates the light as it rotates. A filter circuit in communication with the light receiver is configured to receive the output signal from the light receiver and to detect therefrom modulation of the light by the rotatable member.
3
US6232900B1
Second order digital filter requiring only one sigma delta modulator
Publication/Patent Number: US6232900B1 Publication Date: 2001-05-15 Application Number: 09/299,089 Filing Date: 1999-04-26 Inventor: Hendricks, Paul D.   Smith, Lane A.   Assignee: Lucent Technologies, Inc.   IPC: H03M300 Abstract: A 2nd order digital filter requiring only one sigma delta modulator is created by implementing (1) a 2nd order feedforward term created by the cascade of two 1st order elements; (2) a 2nd order feedback term created by the cascade of two 1st order elements; and (3) another 2nd order feedback term created by the cascade of two more 1st order elements to eliminate the need for another sigma delta modulator to provide a 2nd order filter. Thus, for the mere ‘cost’ of additional feedback loops, which are small in comparison with the size and complexity of another sigma delta modulator, a second sigma delta modulator is not necessary to implement a 2nd order digital filter in accordance with the principles with the present invention.
4
US6232908B1
A/D converter having a dynamic encoder
Publication/Patent Number: US6232908B1 Publication Date: 2001-05-15 Application Number: 09/161,703 Filing Date: 1998-09-29 Inventor: Nakaigawa, Sachio   Assignee: NEC Corporation   IPC: H03M136 Abstract: An A/D converter includes a resistor ladder for generating a plurality of reference potentials, a comparing section for comparing each of the reference potentials against an input analog signal to output a thermometric code, and a dynamic encoder composed of a combinational circuit to encode the thermometric code to a binary code by responding a clock signal. The A/D conversion is finished in a single clock cycle at a high speed, with a reduced number of elements and reduced power dissipation.
5
US6232910B1
High performance vehicle radar system
Publication/Patent Number: US6232910B1 Publication Date: 2001-05-15 Application Number: 09/253,468 Filing Date: 1998-02-19 Inventor: Bell, David Allen   Taur, Roger Rong   Delacueva, Jess   Assignee: Amerigon, Inc.   IPC: G01S1393 Abstract: A radar system is described for use in vehicular applications. The radar system is particularly suited to backup warning systems and lane-change warning systems. The radar minimizes many of the problems found in the prior art by providing programmable delays and programmable gain. The radar uses a range search algorithm to detect and sort targets at various ranges within the field of view of the radar. Each target range corresponds to a particular delay and gain setting. The radar searches for targets at the various ranges by running a target search algorithm. For each target range, the search algorithm causes the proper time delay and gain setting. Targets within the selected range are detected and catalogued. Speed of the targets is obtained through Doppler processing. A display is used to warn the driver of the vehicle of the presence of targets at the various ranges. The warning may be visual and/or audible. When used in a lane-change system, issuance of an audible warning is based on the speed of the vehicle.
6
US6232916B1
GPS restraint system and method for confining a subject within a defined area
Publication/Patent Number: US6232916B1 Publication Date: 2001-05-15 Application Number: 09/387,180 Filing Date: 1999-08-31 Inventor: Grillo, Anthony   Veschi, John P.   Assignee: Lucent Technologies, Inc.   IPC: H09B7185 Abstract: A Global Positioning Satellite (“GPS”)-based restraint system includes a GPS receiver/transmitter for receiving GPS timing signals, a mapping algorithm, a comparator, and a base station receiver. The receiver/transmitter includes a microprocessor for calculating and storing a waypoint. The mapping algorithm calculates a mapped programmed confinement area from a plurality of waypoints obtained along the perimeter of the physical confinement area, and the comparator provides an output comparing the present position of the receiver/transmitter with the programmed confinement area. The comparator output is transmitted as an output signal by the receiver/transmitter to the base station receiver and the position of the subject is monitored while the receiver/transmitter is attached to the subject. The restraint system also includes deterrent means for administering a deterrent to the subject that can be used either in lieu of or with the base station receiver. The deterrent means is attached to the subject and is preferably part of the GPS receiver/transmitter. The comparator output is then selectively input to the deterrent means to administer the deterrent to the subject. The GPS restraint system of the invention is readily transportable and can be remapped in a new location or to reconfigure an existing confinement area. Reinstallation costs associated with wire perimeter systems are eliminated by the present invention. The GPS-based restraint system is not subject to the blackout areas of other systems, and it provides accurate and reliable confinement boundaries for restraining a subject within the selected confinement area.
7
US6232921B1
Method and system for adaptive signal processing for an antenna array
Publication/Patent Number: US6232921B1 Publication Date: 2001-05-15 Application Number: 09/481,567 Filing Date: 2000-01-11 Inventor: Aiken, Richard Thomas   Benning, Roger David   Uptegrove, Dirck   Assignee: Lucent Technologies Inc.   IPC: G01S316 Abstract: A method and system for adaptive signal processing for an antenna array reduces the requisite computations for executing an adaptive algorithm that combines or digitally filters baseband receive signals. The system receives uplink electromagnetic signals from a phased array and uplink electromagnetic signals from a diversity array during the reception of a desired electromagnetic signal transmitted by a desired mobile station. The uplink signals are converted into baseband signals for digital signal processing. The baseband signals are observable as a series of successive time slots. The system determines uplink coarse combining weights associated with the uplink baseband signals of the phased array and downlink coarse combining weights associated with the downlink baseband signals of the phased array. The baseband uplink signals are summed into as few as one resultant baseband signal during or after application of the coarse combining weights to the baseband uplink signals. The system determines fine combining weights for one or more resultant baseband signals and the baseband uplink signals on a symbol-by-symbol basis, or on any durational basis less than a time slot, to combine the signals into a single enhanced baseband signal for symbol detection.
8
US6232922B1
Passive three dimensional track of non-cooperative targets through opportunistic use of global positioning system (GPS) and GLONASS signals
Publication/Patent Number: US6232922B1 Publication Date: 2001-05-15 Application Number: 09/310,808 Filing Date: 1999-05-12 Inventor: Mcintosh, John C.   Assignee: Mcintosh, John C.   IPC: G01S302 Abstract: A method and apparatus for utilization of GPS, GLONASS or other existing RF signals is disclosed. These existing RF signals are scattered by targets, with a receiver of these scattered signals providing processing to extract three dimensional track of these objects. Angle-of-Arrival (AOA) information of a received signal may be used, but is not required. Modifications of standard GPS signal processing allows observables such as range-sum, range-difference, and bistatic Doppler frequency to be observed. These observables, when coupled with standard bistatic/multistatic location equations, provide unambiguous and even redundant information on target coordinates. The method/device employs a modified code (range)/carrier(Doppler) search routine for initial target search/acquisition, wherein a direct path signal is used as a reference from which chip delay and Doppler shift excursions are examined. In this manner, the range and Doppler components observed will correspond to [range-sum−direct path] range, and true bistatic target Doppler irrespective of the satellite or receiver induced Doppler shifts.
9
US6232942B1
Liquid crystal display device
Publication/Patent Number: US6232942B1 Publication Date: 2001-05-15 Application Number: 08/817,898 Filing Date: 1997-04-25 Inventor: Imoto, Satoshi   Ebihara, Heihachiro   Assignee: Citizen Watch Co., Ltd.   IPC: G09G336 Abstract: An antiferroelectric liquid crystal display device provided with means for preventing optical transmittance or the mean value of the optical transmittance from changing in a holding period tk. Thereby, the black display state thereof is stabilized. Further, the control of a gray shades display is facilitated. Moreover, linear gray scale characteristics and high contrast are provided. Thus, in the antiferroelectric liquid crystal display device having a selection period tw and the holding period tk, the optimum holding voltage (Vh), by which the optical transmittance little changes in the holding period tk, is applied to liquid crystals.
10
US6232943B1
Liquid crystal display
Publication/Patent Number: US6232943B1 Publication Date: 2001-05-15 Application Number: 09/040,805 Filing Date: 1998-03-18 Inventor: Tagawa, Akira   Nonomura, Keisaku   Bonnett, Paul   Towler, Michael John   Assignee: Tagawa, Akira   Nonomura, Keisaku   Bonnett, Paul   Towler, Michael John   IPC: G09G336 Abstract: Given a natural number “n”, then, in the first frame of continuous two frames, strobe pulses of opposite polarities are applied respectively to a scanning electrode L2n−1 in a (2n−1)'th line and a scanning electrode L2n in a 2n'th line during a selection period. In the second frame, strobe pulses of opposite polarities are applied respectively to the scanning electrode L2n in the 2n'th line and a scanning electrode L2n+1 in a (2n+1)'th line during a selection period.
11
US6232778B1
Method for obtaining NMR bound fluid volume using partial polarization
Publication/Patent Number: US6232778B1 Publication Date: 2001-05-15 Application Number: 09/096,320 Filing Date: 1998-06-11 Inventor: Speier, Peter   Crary, Steven F.   Kleinberg, Robert L.   Flaum, Charles   Assignee: Schlumberger Technology Corporation   IPC: G01V300 Abstract: The present invention provides methods for determining the bound fluid volume (BFV) of a formation utilizing nuclear magnetic resonance (NMR) techniques in which less than full polarization occurs and in which less than a complete NMR distribution is acquired. The effect of the polarizing static magnetic field is shortened in time by applying a shortened wait time between NMR measurements so that only the bound fluid of the formation is polarized. The shortened wait time is effectuated by early application of the oscillating magnetic field to the formation which, in conjunction with a limited number of refocusing pulses, induces signals in the formation that are measured by the NMR tool. The peak amplitude of these signals corresponds to the BFV. The present invention provides information so that a partial polarization calculation curve in T2 lies almost equally between an empirical tapered cutoff curve and a theoretical tapered cutoff curve. Moreover, because no T2 information must be acquired, the method is especially suited for logging-while-drilling operations, where the drill string moves uncontrollably during the NMR measurement.
12
US6232779B1
NMR RF coil with improved resonant tuning and field containment
Publication/Patent Number: US6232779B1 Publication Date: 2001-05-15 Application Number: 09/382,958 Filing Date: 1999-08-25 Inventor: Tropp, James S.   Boskamp, Eddy B.   Assignee: General Electric Company   IPC: G01V300 Abstract: An RF coil assembly for an NMR instrument includes a cylindrical shield disposed concentrically about a central axis and a set of linear conductors disposed concentrically about the central axis and radially inward from the shield. Assembly further includes an annular member positioned to span the gap between the shield and linear conductors. The annular member includes an insulating substrate, a conductive layer over the substrate, and a series of non-conducting gaps through the conductive layer. One or more lumped element capacitors are connected across one or more of the gaps to tune to resonance.
13
US6232780B1
Underground locating using a locating signal transmitter configured with a single antenna
Publication/Patent Number: US6232780B1 Publication Date: 2001-05-15 Application Number: 09/518,905 Filing Date: 2000-03-03 Inventor: Mercer, John E.   Assignee: Digital Control Incorporated   IPC: G01L311 Abstract: The present invention provides a locator/monitor capable of locating a boring tool and monitoring the progress of the tool for control purposes. The locator/monitor may be used in expedited locating methodology and straightforward calibration techniques of the present invention. A durable and cost effective pitch sensor is also provided by the present invention. In addition, the present invention provides a slotted transmitter housing formed of an electrically conductive material, where the magnetic field generated by the transmitter is capable of penetrating to the surface.
14
US6232788B1
Wafer probe station for low-current measurements
Publication/Patent Number: US6232788B1 Publication Date: 2001-05-15 Application Number: 08/855,735 Filing Date: 1997-05-09 Inventor: Schwindt, Randy J.   Harwood, Warren K.   Tervo, Paul A.   Smith, Kenneth R.   Warner, Richard H.   Assignee: Cascade Microtech, Inc.   IPC: G01R3102 Abstract: A wafer probe station adapted for low-current measurements provides electrically active upper and lower chuck assembly elements where air gaps are provided between a major portion of either a lower or nonlower surface on the upper chuck assembly element and a corresponding conductive surface on or connected to the lower chuck assembly element thereby minimizing leakage currents therebetween. The chuck assembly elements are preferably enclosed by an environment control enclosure having a sidewall portion relative to which the upper chuck assembly element can move laterally. During such movement, the upper chuck assembly remains in constant spacing with a conductive member that laterally surrounds it so as to stabilize electro-magnetic conditions. Concurrently, the sidewall portion is kept motionless relative to the probe holder which keeps contaminants away from the region immediate to the upper chuck assembly element, including any moisture droplets that have condensed during low-temperature testing. Modularity of the chuck assembly elements is preferably facilitated by detachable electrical connections. Preferably, the lower chuck assembly element, the conductive member and an upper guard plate surround the upper chuck assembly element for guarding thereof so as to further minimize leakage currents and reduce settling times.
15
US6232817B1
Temperature stabilization of a predistorter with voltage supply
Publication/Patent Number: US6232817B1 Publication Date: 2001-05-15 Application Number: 09/352,792 Filing Date: 1999-07-14 Inventor: Braun, Klaus   Berger, Werner   Assignee: Alcatel   IPC: H03L500 Abstract: A method of stabilizing the working point of a predistorter diode of a predistorter for an optical modulator as protection from temperature fluctuations, whereby the predistorter diode is supplied with a temperature-dependent voltage in order to adjust the working point, is characterized by the fact that a reference diode is thermally coupled with the predistorter diode so that the reference diode is supplied with a constant current, whereby it is not supplied with a signal distorted by the predistorter, and the predistorter diode is supplied with a voltage which is proportional to the reference diode. One advantage of the invention is that it is possible to achieve good temperature stability in an easy manner.
16
US6232821B1
System for allowing below-ground and rail-to-rail input voltages
Publication/Patent Number: US6232821B1 Publication Date: 2001-05-15 Application Number: 09/483,801 Filing Date: 2000-01-15 Inventor: King, Eric T.   Del, Signore Bruce P.   Assignee: Cirrus Logic, Inc.   IPC: H03K1716 Abstract: A capacitively isolated input system that permits sensing of an input voltage with a below-ground value or a below-substrate voltage value. Multiple input signals are received, and each input signal is connected to cross-connected switching components. Switched output signals are capacitively connected to additional switching components and to a sensing amplifier. This system allows the sensing amplifier to receive capacitively isolated input signals and to provide corresponding output signals at voltages no lower than ground voltage.
17
US6232823B1
Voltage setting circuit in a semiconductor integrated circuit
Publication/Patent Number: US6232823B1 Publication Date: 2001-05-15 Application Number: 09/500,638 Filing Date: 2000-02-09 Inventor: Tsuchida, Kazuhito   Assignee: Mitsubishi Denki Kabushiki Kaisha   IPC: H01H3776 Abstract: Each of a first series element, a second series element, a third series element, and a fourth series element includes a trimming fuse having a small resistance and a resistor serially connected to each other. A first reference voltage is applied to a first end of the first series element, a first end of the second series element is connected to a second end of the first series element, a second end of the second series element is grounded, a first end of the third series element is connected to the first end of the first series element, a first end of the fourth series element is connected to a second end of the third series element, a second end of the fourth series element is connected to the second end of the second series element, a first independent resistor connects the first end of the first series element and the second end of the third series element, and a voltage at the second end of the third series element is output. Therefore, the choices in the output voltage can be increased while suppressing an increase in the area occupied by the resistors.
18
US6232894B1
Reproducible data conversion and/or compression method of digital signals and a data converter and a digital computer
Publication/Patent Number: US6232894B1 Publication Date: 2001-05-15 Application Number: 09/652,567 Filing Date: 2000-08-31 Inventor: Kawasaki, Hiroyuki   Assignee: Kokochi Sangyo Co., Ltd.   IPC: H03M702 Abstract: HEN2, which is a combination of signals in which at least one of two adjacent digits at any digit position of one or more digits of a 2-based three digit redundant binary number with one signal of three digits {n, o, p} each expressing value {−1, 0, 1} as a one-digit signal is a signal “o” expressing zero, is handled as one set of notation, not as a subset of the three digit redundant binary number.
19
US6232824B1
Semiconductor device capable of suppressing transient variation in level of internal power supply potential
Publication/Patent Number: US6232824B1 Publication Date: 2001-05-15 Application Number: 09/440,553 Filing Date: 1999-11-15 Inventor: Kono, Takashi   Assignee: Mitsubishi Denki Kabushiki Kaisha   IPC: G05F110 Abstract: First and second buffer circuits generate first and second reference potentials. A switching circuit selects a first reference potential as a reference potential while a sense operation is not performed and selects a lower second reference potential while the sense operation is performed. A buffer circuit is controlled such that a through current increases only for a predetermined time period at a initiation and a termination of the sense operation.
20
US6232826B1
Charge pump avoiding gain degradation due to the body effect
Publication/Patent Number: US6232826B1 Publication Date: 2001-05-15 Application Number: 09/005,560 Filing Date: 1998-01-12 Inventor: Afghahi, Morteza C.   He, Yueming   Assignee: Intel Corporation   IPC: G05F302 Abstract: A Charge Pump Avoiding Gain Degradation Due to the Body Effect. A charge pump having a first input and a first output, a stage of the charge pump including a first capacitor having a first node and a second node, the second node coupled to receive a first signal; a first p-type transistor having a first gate, a first source, and a first drain, the first gate being coupled to the first node and the first drain, the first source being coupled to the first input; a second capacitor having a third node and a fourth node, the fourth node coupled to receive a second signal; and a second p-type transistor having a second gate, a second source, and a second drain, the second gate being coupled to the third node and the second drain, the second source being coupled to the first drain, the second drain being coupled to the first output.
Total 500 pages