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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7369960 | Device and method for detecting an angular position of a rotating object In detecting the time at which a rotating object passes a given angular position, a value range of an angular position sensor output signal which varies relatively rapidly with angular position acts as a trip threshold that, when exceeded, indicates the object has a... | 05/06/2008 |
| 7301250 | High voltage pulsed power supply using solid state switches Systems and methods for generating a high voltage pulse. A series of voltage cells are connected such that charging capacitors can be charged in parallel and discharged in series. Each cell includes a main switch and a return switch. When the main switches are turne... | 11/27/2007 |
| 7193486 | Tunable, maximum power output, frequency harmonic comb generator A comb frequency generator that is tunable to vary the width of the pulses in the output signal and achieve a maximum power output at different harmonic frequencies. A wavefront compression device receives a sinusoidal input signal and provides wavefront compression... | 03/20/2007 |
| 7098703 | Resonant logic driver circuit An electronic logic driver circuit, for driving a capacitive load between supply potentials for example for use in driving logic circuit elements on or off a chip, is disclosed. The driver circuit comprises switching devices to switch current either to or from two m... | 08/29/2006 |
| 7057871 | Actuation circuit for an electromagnetic actuator The actuation circuit for an actuator (10) includes an energy store (11) arranged near the actuator (10). The energy store (11) is configured such that it instantaneously discharges in response to a trigger signal, wherein the discharge c... | 06/06/2006 |
| 6826208 | Nonlinear transmission line integrated circuit An all-silicon nonlinear transmission line (NLTL) is integrated with a pulse-forming circuit in the form of a reverse-biased diode. Relatively short, e.g., 27 ps, optical signals can be generated from the all-silicon NLTL circuit by laser modulation of the electrica... | 11/30/2004 |
| 6690247 | Nonlinear transmission line waveform generator having an input voltage matched to the C/V characteristic of the transmission line A nonlinear transmission-line waveform generator for generating a comb of frequencies and relatively short duration pulses, for example, in the range of picoseconds and tens of picoseconds, that are adapted to being utilized with ultra wideband radios in ... | 02/10/2004 |
| 6538525 | Voltage biased section of non-linear transmission line The principal reason that commercially available 10 gigabits per second electrical interconnect has not previously been available is that such interconnect structures possess too high a level of parasitic inductance, capacitance, resistance and conductanc... | 03/25/2003 |
| 6518706 | Method for generating a short-pulsed microwave and an equipment for generating a short-pulsed microwave A continuous or a long-pulsed microwave oscillated from a microwave oscillator 1 is propagated in a waveguided tube 2 in which a given gas is charged. Subsequently, by irradiating a laser having a given intensity from a laser source 4 to the points, A and... | 02/11/2003 |
| 6249417 | Electrical circuit for producing a substantially constant pulsed magnetic field for repelling rodents An electrical circuit for producing a substantially constant pulsed magnetic field for repelling rodents includes an electromagnetic coil for generating a magnetic field in response to alternating current (AC) power applied to terminals of the coil and a ... | 06/19/2001 |
| 5923227 | Non-linear dispersive transmission line A non-linear dispersive transmission line includes a plurality of substantially block-like shaped capacitor elements (4) arranged in sequence in at least two arrays. The even numbered elements (4b, 4d etc) extend side by side to form a first array and the... | 07/13/1999 |
| 5900681 | Electric device for generating high-voltage square pulses A device for generation of electric square pulses with a short rise time, comprises at least an energy-storing capacitor in the form of a coaxial cable with an insulated screen, wherein essentially the whole coaxial cable is wound up in an inner closed cy... | 05/04/1999 |
| 5808495 | Magnetron driving circuit According to the present invention, to drive a magnetron, a pulse voltage is applied to the gate electrode of a field effect transistor to make the field effect transistor conductive, so that a voltage stored in a storage condenser is discharged through t... | 09/15/1998 |
| 5804921 | Soliton quenching NLTL impulse circuit with a pulse forming network at the output An impulse forming circuit is disclosed which produces a clean impulse from a nonlinear transmission line compressed step function without customary soliton ringing by means of a localized pulse shaping and differentiating network which shunts the nonline... | 09/08/1998 |
| 5796314 | Active high-power RF switch and pulse compression system A high-power RF switching device employs a semiconductor wafer positioned in the third port of a three-port RF device. A controllable source of directed energy, such as a suitable laser or electron beam, is aimed at the semiconductor material. When the so... | 08/18/1998 |
| 5789994 | Differential nonlinear transmission line circuit A differential nonlinear transmission line (NLTL) circuit has anti-parallel diode pairs along a balanced transmission line to generate well defined high-speed pulses with sharp positive and negative transitions from a time varying input signal. The input ... | 08/04/1998 |
| 5675275 | Arrangement for the generation of a high-frequency needle pulse train and of an inverted needle pulse train In order to sample high-frequency signals, it is necessary to have a needle pulse train and a needle pulse train which is inverted with respect thereto. By means of a switch (T) which is controlled by a clock signal (U), a positive operating voltage (U | 10/07/1997 |
| 5621344 | Circuit arrangement for coupling a first electric signal into a second electric signal In a circuit arrangement for coupling a first signal into a second electric signal formed as an alternating signal, a device is provided for compensating for effects of the coupling on the signal pattern of the second signal, particularly on the "pulse ti... | 04/15/1997 |
| 5585758 | Current source gate drive circuit for simultaneous firing of thyristors A current source gate drive circuit for simultaneous firing of a set of series or parallel thyristors is described. The circuit includes two current loops, each of which serves as a current transformer primary. Electrically insulating tubes enclose the cu... | 12/17/1996 |
| 5559463 | Low power clock circuit High-efficiency clock generator circuits having single or complementary outputs for driving capacitive loads. The clock generator has therein at least one pair of complementary FET switches, coupled between the output of the generator and power supply rai... | 09/24/1996 |
| 5554948 | Adaptive threshold circuit with deceleration compensation An adaptive threshold circuit for use with a magnetic type of sensor that has a pick-up coil. The pick-up coil has an alternating voltage induced therein when a slot or tooth formed in a wheel rotates past the sensor. The circuit produces a square wave pu... | 09/10/1996 |
| 5426388 | Remote tone burst electromagnetic acoustic transducer pulser A remote tone burst pulser for an electromagnetic acoustic transducer utilizes a circuit having a direct current power source which is provided to a main capacitor. A high power, high speed insulated gate bipolar transistor or metal oxide-semiconductor co... | 06/20/1995 |
| 5394020 | Vertical ramp automatic amplitude control A vertical ramp generator includes a voltage controllable charge current source and a switched discharge current source coupled across a ramp capacitor. A pair of comparators coupled to first and second reference potentials are supplied with the ramp capa... | 02/28/1995 |
| 5391998 | Modulator for efficiently generating short high voltage repetitive pulses A modulator for producing repetitive short high voltage pulses is provided. The modulator includes a high voltage power supply, a plurality of pulse forming networks each capable of being charged to a potential equal to twice the voltage of the high volta... | 02/21/1995 |
| 5331213 | Pulse transmission circuit with undershoot eliminating circuitry An undershoot eliminating circuit is provided between a pulse transformer of a pulse transmitter coupled to a transmission line and a pulse transformer driving circuit for driving the pulse transformer. The pulse transformer driving circuit has an impedan... | 07/19/1994 |
| 5319665 | High power electromagnetic pulse driver using an electromagnetic shock line A high power electromagnetic pulse driver for generating sub-microsecond rise time pulses having energy contents greater than 1 joule includes an electromagnetic pulse compressor and an electromagnetic shock line for compressing the leading edges of those... | 06/07/1994 |
| 5291143 | Modulator with improved damping A modulator with improved damping comprises a charging network which limits the rate at which energy is transferred into a pulse forming network, and a switch to discharge the energy stored in the pulse forming network when the network has charged to a pr... | 03/01/1994 |
| 5280382 | Direct current to radio frequency pulse generating system A circuit arrangement to convert high voltage direct current energy into radio frequency energy that includes photoconductive switch means which is periodically closed by a pulsed light source, such as a laser, to generate the radio frequency energy. A se... | 01/18/1994 |
| 5187384 | Method and circuit configuration for triggering a semiconductor switch through the use of an inductive transformer A method for triggering a semiconductor switch with an inductive transformer having a primary side and having a secondary side connected to the semiconductor switch to be triggered includes dissipating magnetic energy that may be stored in the transformer... | 02/16/1993 |
| 5184085 | High-voltage pulse generating circuit, and discharge-excited laser and accelerator containing such circuit A first high-voltage pulse generating circuit comprises a magnetic pulse compression circuit having a main saturable reactor provided with a reset circuit, the reset circuit being provided with a second saturable reactor for providing pulse voltage or cur... | 02/02/1993 |
| 5150067 | Electromagnetic pulse generator using an electron beam produced with an electron multiplier A pulse generator for producing high-energy, subnanosecond electromagnetic pulses. The generator comprises a pulsed cathode assembly (160) which includes a microchannel-plate electron multiplier (150) triggered by a low-intensity, pulsed electron beam. An... | 09/22/1992 |
| 5148111 | Electromagnetic pulse simulator An electromagnetic pulse simulator includes two large-area electrodes mounted in spaced apart relation, and a high voltage generator electrically connected to the two electrodes to apply a high voltage between them. The electrical connection of the high-v... | 09/15/1992 |
| 5148129 | Microwave pulse compression from a storage cavity with laser-induced switching A laser-induced switch and a multiple cavity configuration are disclosed for producing high power microwave pulses. The microwave pulses are well controlled in wavelength and timing, with a quick rise time and a variable shape and power of the pulse. In a... | 09/15/1992 |
| 5105097 | Passive magnetic switch for erecting multiple stage, high-pulse-rate voltage multipliers Megavolt voltage multipliers having an output impedance of less than 10 ohms and capable of operating at high pulse repetition frequencies, are switched with high performance saturable core inductors having multiple windings to provide voltage and current... | 04/14/1992 |
| 5089727 | Pulsed driver circuit A modulator circuit provides pulses of electrical energy to an electrical load in response to a trigger signal. A normally nonconductive Mosfet is included in a series circuit path with the electrical load and a capacitor. A silicon controlled rectifier (... | 02/18/1992 |
| 5083093 | Circuit for coupling energy to pulse forming network or capacitor A pulse forming network or capacitor load is charged to a precise voltage from an energy storing device with a circuit including a transformer having a primary connected in series with a switch and storage device and a secondary connected in series with t... | 01/21/1992 |
| 5066928 | Soliton pulse compressor A pulse compressor for solitons includes a continuous dispersive non-linear propagation structure so constructed so that the wavefront of an individual soliton pulse is steepened. In addition, the pulse compressor has a continuously reduced time constant ... | 11/19/1991 |
| 5003195 | Pin diode attenuator RF pulse generator with pulse rise and fall time control A capacitor is charged and discharged through switch selectable resistors from regulated DC voltage supplies and clamping diodes to provide the bias signal to control the rise and fall times of the RF output pulse of a PIN diode attenuator. An isolation b... | 03/26/1991 |
| 4996494 | Droop compensated PFN driven transformer for generating high voltage, high energy pulses A pulse forming system for providing constant power pulses for variably resistive loads is disclosed. It includes a high voltage power source, a pulse forming network, and a transformer circuit. The high voltage power source outputs a voltage signal with ... | 02/26/1991 |
| 4996495 | Method and apparatus for generating pulsed RF power An improved method and apparatus for generating a pulsed RF power signal is provided. A DC pulse signal is generated which is compressed to increase its power to a predetermined level. The compressed pulse signal is applied to rapidly charge capacitive el... | 02/26/1991 |
