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| Patent # | Description |
|---|---|
| US-5,781,040 |
Transformer isolated driver for power transistor using frequency
switching as the control signal A driver for a power transistor (a MOSFET or IGBT) uses a transformer to isolate the power supply from the control signal, but uses very low power components on... |
| US-5,781,039 |
Frequency controlled switch A method and an apparatus in testing whether the frequency of an incoming signal is higher or lower than a predetermined value. The method only demands a... |
| US-5,781,038 |
High speed phase locked loop test method and means A means and method for testing high speed phase locked loops (13) in an integrated circuit (12) at a test frequency lower than the operation speed of the phase... |
| US-5,781,037 |
Method and apparatus for an address transition detection circuit The present invention relates to an improvement to an address transition detection (ATD) circuit in an IC chip, a method related to the improved ATD circuit is... |
| US-5,781,036 |
Phase detector A phase detector biased in a manner to alleviate the mismatch between the biasing current sources and the phase detector core bias currents. The bias setting... |
| US-5,781,035 |
Dual-differential-pair emitter-coupled logic complementary-output circuit A complementary-output vertically-stacked ECL gate circuit is disclosed which is low in power dissipation and fast in operation. The ECL gate circuit has a dual... |
| US-5,781,034 |
Reduced output swing with p-channel pullup diode connected An output buffer having a reduced-swing output includes a p-channel pullup transistor as the primary pullup device. A biasing circuit is provided so as to bias... |
| US-5,781,033 |
Logic module with configurable combinational and sequential blocks A logic module includes first and second multiplexers each having two data inputs and a select input. Both select inputs are connected to the output of a... |
| US-5,781,032 |
Programmable inverter circuit used in a programmable logic cell A programmable logic cell has four cell input nodes and a plurality of combinational logic circuits. Four inverter circuits are provided for programmably... |
| US-5,781,031 |
Programmable logic array A programmable logic array (PLA) includes two direct-write EEPROM arrays, and PLA logic circuitry, such as feedback, drivers and input and output circuitry. One... |
| US-5,781,030 |
Programmable uniform symmetrical distribution logic allocator for a
high-density complex PLD A programmable uniform distribution logic allocator enhances the speed, silicon utilization, logic efficiency, logic utilization, and scalability of very... |
| US-5,781,029 |
Broadband matching technique for high speed logic and high resolution
video signals A termination circuit for RGB signal lines provides a high frequency termination impedance that matches the impedance of a monitor cable and monitor termination,... |
| US-5,781,028 |
System and method for a switched data bus termination A bidirectional universal serial bus (USB) includes switched terminations that are selectively activated to terminate the receiving end of the data bus in its... |
| US-5,781,026 |
CMOS level shifter with steady-state and transient drivers A level shifter is provided with first and second steady-state drivers and transient driver circuitry. Each steady-state driver includes a low enable input, a... |
| US-5,781,025 |
Method for testing an electronic circuit by logically combining clock
signals, and an electronic circuit... An electronic circuit has a plurality of nodes at which a plurality of clock signals are present in operational use. The clock signals should have a... |
| US-5,781,024 |
Instrument performance verification system A device and method for testing and monitoring, either manually or automatically, the performance of various components electrically linked to the electronic... |
| US-5,781,023 |
Hollow plunger test probe A hollow plunger spring probe assembly for performing tests on an electrical device including a probe receptacle for receipt of the hollow plunger. The plunger... |
| US-5,781,022 |
Substrate having self limiting contacts for establishing an electrical
connection with a semiconductor die A die contacting substrate for establishing ohmic contact with the die is formed with raised portions on contact members. The raised portions are dimensioned so... |
| US-5,781,021 |
Universal fixtureless test equipment A universal, fixtureless automatic test equipment is provided, capable of accessing opposite surfaces of any workpiece, simultaneously, for functionality... |
| US-5,781,020 |
Method of calculating an impedance of an electromagnetic part to which
rotational body shape approximation is... In the method of calculating the impedance of an electromagnetic part, the cost is low, the calculation time is short, and data for analysis are easy to handle.... |
| US-5,781,019 |
Probe for use in time domain reflectometry A probe for use in time domain reflectometry includes a body having a conductive portion and an insulated portion. A conductive loop is provided having a first... |
| US-5,781,018 |
Near-field resistivity microscope A microwave microscope comprising a microwave waveguide having a probe end positioned closely above the surface to be probed such that the surface is in the near... |
| US-5,781,017 |
Capacitive charge generation apparatus and method for testing circuits An electron beam apparatus and method for testing a circuit. The electron beam apparatus comprises an electron beam incident on an outer surface of an insulating... |
| US-5,781,016 |
Connector fitting detection apparatus One of two connector housings adapted to be fitted with each other has a slider with a cam section. The second connector housing is formed with a slider pressure... |
| US-5,781,015 |
Extension cord with integral monitoring system An extension cord with integral monitoring system including a male connector having a pair of strip contacts. Such contacts include a neutral strip contact and a... |
| US-5,781,013 |
Battery management system for electric vehicle A battery monitoring routine is executed at a short period such as one minute as an initial value when a key switch is turned on to drive an electric vehicle (so... |
| US-5,781,012 |
Ion current detecting apparatus for internal combustion engines An ion current detection apparatus for detecting an ion current caused by combustion in a cylinder of an internal combustion engine comprises an ion current... |
| US-5,781,011 |
Dielectric resonator-based electron paramagnetic resonance probe An apparatus for use in electron paramagnetic spectroscopy having a resonant structure with one or more dielectric resonators, the resonant frequency of which... |
| US-5,781,010 |
Method and apparatus for MR imaging without a flashing phenomenon of an
object having periodical motion In an MR imaging method, at least radio frequency pulses for excitation are repetitiously consecutively applied in accordance with predetermined pulse sequences... |
| US-5,781,009 |
Two-coil apparatus for measuring the absolute value of magnetic
penetration depth .lambda. of superconductor films An improved two-coil apparatus for measuring the absolute value of magnetic penetration depth .lambda. of superconductor films which is capable of measuring the... |
| US-5,781,008 |
Instantaneous slag thickness measuring device An apparatus for measuring the thickness of a slag layer on a metal melt in a metallurgical vessel comprises a first inductive eddy current sensor which... |
| US-5,781,007 |
Portable three axis scanner to inspect a gas turbine engine spool by
eddy current or ultrasonic inspection A portable three axis scanner is usable to inspect a gas turbine engine spool in situ upon removing a fan module from the engine. The scanner includes a drive... |
| US-5,781,006 |
Magnetic sensor for indentifying the position of a test subject A magnetic distance sensor for acquiring the position of a test subject has an elongated magnetic core that contains crystalline strips and amorphous strips. A... |
| US-5,781,005 |
Hall-effect ferromagnetic-article-proximity sensor A Hall-effect sensor is presented which is adapted to sense a ferromagnetic object, including an integrated circuit chip having a planar Hall element which is... |
| US-5,781,004 |
Method of production using an electronic assembly pallet A pallet and a method of operation is provided with electrical signal and power connections so that burn-in and other quality assurance testing can be completed... |
| US-5,781,003 |
Electric field sensor By using an electric field sensor comprising a sensor head 100 for producing a transmitted light wave having an intensity which varies in dependence upon an... |
| US-5,781,002 |
Anti-latch circuit for low dropout dual supply voltage regulator Efficient very low dropout (i.e., approximately equal to about V.sub.CESAT of the output transistor) dual supply voltage regulator circuits and methods are... |
| US-5,781,001 |
Display-driving voltage generating apparatus Power consumption, in an apparatus for generating a display unit drive voltage, is reduced. The potential at a point A is held substantially intermediately... |
| US-5,781,000 |
Power control unit loading test method In a power control unit according to the present invention, an output voltage of a power circuit is detected as a control voltage by an output voltage detector... |
| US-5,780,999 |
Voltage conversion circuit for a laser based distance measurement and
ranging instrument A voltage conversion circuit for transforming an input voltage level at an input voltage node to a relatively higher output voltage level at an output voltage... |
| US-5,780,997 |
Variable reluctance alternating current generator A variable reluctance generator for producing alternating current at a fundamental frequency independent of a rotational speed at which the generator is driven... |
| US-5,780,996 |
Alternating current generator and schottky barrier diode Rectifying elements that constitute a full-wave rectifier of an on-vehicle alternator are constituted by Schottky barrier diodes. The Schottky barrier diode has... |
| US-5,780,995 |
Automotive voltage regulator and charging system A circuit for regulating the charging voltage to a battery and connected to the field inductor (IND) of an alternator (ALT) which supplies that voltage. It is... |
| US-5,780,994 |
Detection of inflection point in secondary-battery charging process by
matching voltage response to first... A secondary battery charging method that utilizes a standard, characteristic reference curve for that type of battery for identifying the voltage inflection... |
| US-5,780,993 |
Combination battery charger and power source for electrically powered
devices A combination charger and power source for an electrically powered device having a removable battery pack that has one or more batteries enclosed within a... |
| US-5,780,992 |
Rechargeable battery system adaptable to a plurality of battery types An adaptive rechargeable battery system capable of utilizing battery packs of a variety of electrochemical cells includes a portable electronic battery powered... |
| US-5,780,991 |
Multiple station charging apparatus with single charging power supply
for parallel charging A charging apparatus with multiple charge stations is disclosed. The apparatus includes a single power supply which operates under the control of a... |
| US-5,780,990 |
Parasynchronous induction motor control method and apparatus Alternating current electric induction motor operating from a source of AC electric power is driven at a parasynchronous rate of field collapse and magnetic flux... |
| US-5,780,989 |
Method and apparatus for AC servo motor control The present invention relates to an AC servo motor control is disclosed, in which a voltage command is produced from the deviation between a current command and... |
| US-5,780,988 |
Method for detecting the position, direction of rotation and rotational
speed of a rotatably seated part The present invention provides a method for detecting the position, direction of rotation and rotational speed of a rotatably seated part, which are employed,... |
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