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| Patent # | Description |
|---|---|
| US-5,581,202 |
Semiconductor integrated circuit device and production method thereof The semiconductor integrated circuit enjoys a high performance and can be produced at a low production cost and within a short time. A cell has an internal... |
| US-5,581,201 |
Apparatus for unit control and presence detection A digital control circuit is constructed to use a single signal line for the dual functions of control and sensing the presence of the controlled device. The... |
| US-5,581,200 |
Stored and combinational logic function generator without dedicated
storage elements A logic circuit which implements numerous logic functions, stored and combinational, without the use of flip-flops or different types of logic elements. This... |
| US-5,581,199 |
Interconnect architecture for field programmable gate array using
variable length conductors An FPGA architecture is provided which uses logic unit output lines of more than one length and provides extension lines to increase the reach of a logic unit... |
| US-5,581,198 |
Shadow DRAM for programmable logic devices A plurality of DRAM cells are used to store the state of the programmable points in the FPGA ("FPGA DRAM cells"). A shadow DRAM array holds duplicate data of the... |
| US-5,581,197 |
Method of programming a desired source resistance for a driver stage The output impedance in a CMOS output driver stage is programmed and compensated by complementary current mirrors that are MOS devices in series with each of the... |
| US-5,581,195 |
Semiconductor chip holding device An appartus for testing bare semiconductor chips, especially for burn-in testing, includes a chip holding socket which comprises a substrate portion having at... |
| US-5,581,194 |
Method and apparatus for passive optical characterization of
semiconductor substrates subjected to high energy... The method and apparatus of the present invention provides a fast, efficient, non-contact, non-destructive means of characterizing surface and near-surface... |
| US-5,581,193 |
Multiple source and detection frequencies in detecting threshold
phenomena associated with and/or atomic or... Multiple frequency sources are used to apply a time varying signal to a scanning tunneling microscope and a current or voltage passing between the electrodes of... |
| US-5,581,192 |
Conductive liquid compositions and electrical circuit protection devices
comprising conductive liquid compositions Novel conductive liquid compositions which have low resistivity when carrying an applied steady-state current (I.sub.Steady-State) but exhibit sharp increases in... |
| US-5,581,191 |
Microwave densitometer A microwave densitometer comprises a phase difference detecting section for detecting a phase difference between a microwave generated from a microwave generator... |
| US-5,581,190 |
Method and apparatus for testing RF devices An RF device (12), such as an amplifier, is tested by applying a digitally-modulated RF stimulus signal, having a known magnitude and phase angle, to the device... |
| US-5,581,189 |
Water purity testing system having reversing polarity A water purity testing system includes a sensor housing having an internal chamber within which pair of electrodes are supported. Fittings are provided for... |
| US-5,581,188 |
Misfire detecting device A misfire detecting device for an ignition system, comprises high voltage applying device for applying a pulsed high voltage to each spark plug of an engine... |
| US-5,581,187 |
Actively shielded planar gradient coil for pole plate magnets of a
magnetic resonance imaging apparatus Each pole plate of a pole plate magnet of a magnetic resonance imaging apparatus has a sub-coil of the gradient coil allocated to it. Each sub-coil is composed... |
| US-5,581,186 |
Bird cage resonator for high resolution nuclear magnetic resonance A resonator which is arranged on a hollow cylindrical support (1) for the taking of high resolution magnetic nuclear resonance spectra from a sample extending... |
| US-5,581,185 |
Torque-balanced gradient coils for magnetic resonance imaging A magnetic resonance imaging apparatus includes main field coils (10) for generating a temporally uniform magnetic field longitudinally through a central bore... |
| US-5,581,184 |
Method for phase correction of nuclear magnetic resonance signals In a pulse sequence wherein image echoes are acquired under readout gradients of alternating operational sign, a navigator echo is respectively acquired under a... |
| US-5,581,183 |
Method for the operation of a magnetic resonance apparatus In a method for operating a magnetic resonance apparatus, having a radio frequency system for transmitting radio frequency excitation pulses and/or for receiving... |
| US-5,581,182 |
Method and apparatus for broadband decoupling in nuclear magnetic
resonance with chirp pulses Methods and apparatus for broadband decoupling in nuclear magnetic resonance with chirp and other RF pulses are disclosed. Such methods may include the step of... |
| US-5,581,181 |
Grase MRI with read gradient polarity correction and T.sub.2 measurement In a GRASE magnetic resonance method, most profiles in k-space with a certain k.sub.y value are measured with different magnetic field read gradient polarity and... |
| US-5,581,180 |
Horizontal and vertical displacement detector of wire rope A displacement detector detects a relative position between a wire rope and a pulley of a transfer apparatus. The detector includes a magnet disposed to face the... |
| US-5,581,179 |
Hall-effect ferrous-article-proximity sensor assembly This invention is a magnetic-field sensor assembly comprising a preformed housing shell having a first end which includes an opening, and a second end which... |
| US-5,581,178 |
Method of and device for contactless measurement of rotary speed of
direct current motor by forming... A method of and an arrangement for rotary speed determination in an electric motor is used to determine an instantaneous motor rotary speed from an alternating... |
| US-5,581,177 |
Shaping ATE bursts, particularly in gallium arsenide An improved ATE and methods are provided by forming and comparing pattern bursts digitally in gallium arsenide IC's. A desired burst waveform at the DUT terminal... |
| US-5,581,176 |
Analog autonomous test bus framework for testing integrated circuits on
a printed circuit board To improve testability of analog or mixed analog/digital circuit modules mounted on a carrier, three-way switches are placed at input and output ports of the... |
| US-5,581,175 |
Digital tester with probe storage features A digital tester includes structure for: automatically effecting AC/DC determination of an input signal and subsequent AC/DC switch-over of a measurement system,... |
| US-5,581,174 |
Band-gap reference current source with compensation for saturation
current spread of bipolar transistors A reference current source for generating a reference current (Irf) includes a bipolar first transistor (2) and a bipolar second transistor (4), the base of the... |
| US-5,581,173 |
Microcontroller-based tap changer controller employing half-wave
digitization of A.C. signals A microcontroller-based tap-changer controller including apparatus for keeping track of an electrically closed tap position and for automatically changing the... |
| US-5,581,172 |
Apparatus for controlling output of vehicular AC generator An apparatus for controlling an output from an AC generator for a vehicle is provided which enables wiring from an external control unit to a voltage regulator... |
| US-5,581,171 |
Electric vehicle battery charger An on-board electric vehicle battery charger includes a surge limiter circuit, a power factor control circuit, and a resonant inverter circuit. The power factor... |
| US-5,581,170 |
Battery protector A battery protector for providing overvoltage and undervoltage protection to one or more series-connected cells. The battery protector includes a voltage... |
| US-5,581,169 |
Apparatus used with an inverter/converter eliminating unintended voltage
pulses A method and apparatus used with a motor controller having a PWM inverter for eliminating discontinuities in a stator current that are caused by noise, command... |
| US-5,581,168 |
Starter/generator system with DC link current control A synchronous generator usable in both a starting mode of operation and a generating mode of operation includes a permanent magnet generator having a permanent... |
| US-5,581,167 |
Flexible servo control method A robotic arm is driven by a servomotor which is controlled through position and speed control loops. The position and speed control loops are adaptable in... |
| US-5,581,166 |
Industrial robot with servo In a device having a first member and a second member which are driven relative to one another by an actuator, a servocontrol derives feedback by sensing the... |
| US-5,581,165 |
Device for controlling rotational direction of a direct current motor
and applying brake thereto This invention relates to a mechanism for controlling rotational direction of a direct current motor and a applying brake thereto and in particular to one... |
| US-5,581,164 |
Keystone description correcting circuit using high voltage correction
circuit and feedback from the vertical... A flat type CRT includes a horizontal deflection circuit and/or a vertical deflection circuit, in which order to prevent undesired zooming without using a high... |
| US-5,581,163 |
Generator of periodic signals A periodic signal is produced by counting pulses of a clock during a given period of time. The number of pulses counted is divided by a whole number. A count is... |
| US-5,581,162 |
CRT display A CRT display for producing picture images on a cathode ray tube comprising a bipolar electromagnet located at a neck portion of a cathode ray tube and having... |
| US-5,581,161 |
DC coupled electronic ballast with a larger DC and smaller AC signal A low cost, high efficiency electronic larger DC/smaller AC ballast for fluorescent lamps and other gas discharge devices uses fast react feedback and constant... |
| US-5,581,160 |
Method and apparatus for lighting an EL element An electroluminescence (EL) element lighting device for an EL element, includes a first circuit for self-oscillating to generate a first signal having a first... |
| US-5,581,159 |
Back-to-back diode current regulator for field emission display A circuit for regulating the pixel current in a field emission display so as to enhance pixel-to-pixel uniformity of pixel current. The pixel current flows... |
| US-5,581,158 |
Lamp brightness control circuit with ambient light compensation A compact auxiliary circuit modifies the operation of a low-voltage control circuit associated with an electronic dimming gas discharge lamp ballast. The... |
| US-5,581,157 |
Discharge lamps and methods for making discharge lamps In some embodiments, a light bulb for an electrodeless discharge lamp has a protuberance such that the cold spot of the bulb is located in the protuberance. The... |
| US-5,581,156 |
HF sustained, DC discharge driven negative ion source with automatic
control system A negative ion source with an automatic control system wherein a low power igh frequency discharge is used to sustain a high power low voltage dc discharge in a... |
| US-5,581,155 |
Plasma accelerator with closed electron drift The plasma accelerator comprises: a main annular channel (24) for ionization and for acceleration defined by parts (22) made of insulating material and open at... |
| US-5,581,154 |
Resistive wall klystron amplifier Nonlinear current modulation of a relativistic electron beam is achieved by ts propagation without interruption through a resistive wall type of drift tube... |
| US-5,581,153 |
Electron beam tube having resonant cavity circuit with selectively
adjustable coupling arrangement An electron beam tube arrangement in an inductive output tetrode. The arrangement comprises a resonant cavity circuit having two cavities, and includes an... |
| US-5,581,152 |
Dielectric barrier discharge lamp In a dielectric barrier discharge lamp, in which a discharge vessel, in which a discharge gas forming "excimer" molecules is encapsulated, is provided with a... |
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