Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7868708 | Method and apparatus for making a highly uniform low-stress single crystal by drawing from a melt and uses of said crystal The method of making uniform low-stress crystals includes immersing a seed crystal held at a temperature under its melting point in a melt in a crucible and drawing it from the melt. The crystal and/or melt are rotated relative to each other and a planar phase bound... | 01/11/2011 |
| 7307581 | Mounting structure of high-frequency semiconductor apparatus and its production method In a high-frequency circuit having a substrate having a high-frequency transmission line and an dielectric resonator formed on said substrate so that said dielectric resonator and said high-frequency transmission line may be coupled electro-magnetically to each othe... | 12/11/2007 |
| 7253725 | Apparatus and method for boosting signals from a signal-generating or modifying device Arrangement for providing a boosted signal from a signal-generating device, such as a SAW device or an RFID tag, including an antenna and a circulator having a first port connected to the antenna to receive a signal therefrom and a second port connectable to the dev... | 08/07/2007 |
| 7249412 | Method for repairing a damaged blade of a Blisk A BLISK having a damaged blade, with a repair region that has a thickness less than a specified thickness as a result of damage during manufacture or prior service, is repaired by depositing repair metal onto the repair region to increase its thickness to greater th... | 07/31/2007 |
| 7151787 | Backscatter absorption gas imaging systems and light sources therefore The location of gases that are not visible to the unaided human eye can be determined using tuned light sources that spectroscopically probe the gases and cameras that can provide images corresponding to the absorption of the gases. The present invention is a light ... | 12/19/2006 |
| 7136017 | Pin fin ground plane for a patch antenna A system and method improves linearly-polarized microstrip patch antenna performance and fabrication through the incorporation of a pin fin ground plane and an integral antenna feed assembly. In one embodiment, a patch antenna system includes an antenna area with a ... | 11/14/2006 |
| 7055380 | Transmitter for tire condition monitoring apparatus A transmitter is located in a tire of a vehicle and transmits data indicating a tire condition using a carrier wave. The transmitter has an oscillator circuit and a transmission controller. The oscillator circuit generates the carrier wave. The transmission controll... | 06/06/2006 |
| 7039885 | Methodology for design of oscillator delay stage and corresponding applications Methods are described that involve characterizing an oscillator's jitter or phase noise over a plurality of the oscillator's effective number of delay stages. The oscillator comprises a series of delay stages. Each one of the effective number of delay stages, if sel... | 05/02/2006 |
| 7020367 | Optical coupler An optical coupler comprises a tapered waveguide formed so that a waveguide width may be narrower as going from a predetermined starting position toward an emission end of a light signal. A difference between a first coupling factor and a second coupling factor is s... | 03/28/2006 |
| 7009429 | Method and circuit for compensating MOSFET capacitance variations in integrated circuits A method for tracking the MOS oxide thickness by the native threshold voltage of a “native” MOS transistor without channel implantation for the purpose of compensating MOS capacitance variations is achieved. The invention makes use of the fact that in MOS device... | 03/07/2006 |
| 7002421 | Method and circuit for compensating MOSFET capacitance variations in integrated circuits A method for tracking the MOS oxide thickness by the native threshold voltage of a “native” MOS transistor without channel implantation for the purpose of compensating MOS capacitance variations is achieved. The invention makes use of the fact that in MOS device... | 02/21/2006 |
| 6993307 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 01/31/2006 |
| 6975402 | Tunable light source for use in photoacoustic spectrometers The present invention provides a photoacoustic spectrometer that is field portable and capable of speciating complex organic molecules in the gas phase. The spectrometer has a tunable light source that has the ability to resolve the fine structure of these molecules... | 12/13/2005 |
| 6965761 | Controlled oscillator circuitry for synthesizing high-frequency signals and associated method A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 11/15/2005 |
| 6949887 | High frequency inductive lamp and power oscillator An oscillator includes an amplifier having an input and an output, a feedback network connected between the input of the amplifier and the output of the amplifier, the feedback network being configured to provide suitable positive feedback from the output of the amp... | 09/27/2005 |
| 6876265 | System and method for using a saw based RF transmitter for AM modulated transmission in a TPM For use in a tire pressure monitoring system, an amplitude modulation (AM) radio frequency (RF) oscillator includes a modulator and a generator. The modulator may be configured to generate a modulation signal in response to a data input signal. The generator may be ... | 04/05/2005 |
| 6807509 | Method and systems to measure propagation delay in semiconductor chips A method and systems to evaluate the propagation delay within a semiconductor chip (305) that is embedded in an electronic system without requiring measurement apparatus and specific electrical contacts is disclosed. Since most of electronic systems use a mic... | 10/19/2004 |
| 6791426 | Balanced oscillator and electronic apparatus including the same A balanced oscillator includes a differential oscillator circuit having two output terminals, and a differential amplifier circuit having two input terminals each being connected with a respective one of the two output terminals of the differential oscillator circui... | 09/14/2004 |
| 6731169 | Differential amplifier circuit The first amplifier circuit D1 is formed by connecting drains of a pair of N-channel MOS transistors forming the first current mirror circuit CM1 respectively to the drains of P-channel MOS transistors 1 and 2 as a differential input port... | 05/04/2004 |
| 6714086 | Symmetric oscillators A symmetrical oscillator includes a reactive element, such as an inductor, coupled between first and second active components, where the reactive element defines a fundamental resonant frequency with one or more capacitances of the oscillator. A first feedback circu... | 03/30/2004 |
| 6674334 | Oscillator having surface acoustic wave resonator and oscillation circuit An oscillator is provided that can be flexibly retrofitted to become usable for a wide range of applications, that is compatible with different users'requests, and that enables a user to design a high-frequency unit using the oscillator without concerns. ... | 01/06/2004 |
| 6545553 | Oscillator for generating microwave radiation, and method of assembling an oscillator An oscillator comprising an oscillator body having a waveguide and a substantially cylindrical bore intersecting the waveguide, and a package comprising a heat sink having a substantially cylindrical portion and an oscillatory semiconductor device support... | 04/08/2003 |
| 6420937 | Voltage controlled oscillator with power amplifier A high power type voltage controlled oscillator (VCO) includes (a) an input terminal for receiving a controlling voltage, (b) a voltage controlled oscillating section (VCO section) to which the controlling voltage is supplied, (c) a power amplifier to whi... | 07/16/2002 |
| 6380817 | Oscillators with the multi-layer non-radiative dielectric waveguide structure The present invention relates to an oscillator with the multi-layer non-radiative dielectric waveguide structure, which is able to generate various frequencies through oscillator elements and resonators, built in a multi-space structure with non-radiative... | 04/30/2002 |
| 6363036 | Light clock A light clock measures time by having a light pulse source initiating a light pulse which travels a preset distance in an open or closed loop. A counter is increases incrementally upon detection of the light pulse by a light pulse detector. Each increment... | 03/26/2002 |
| 6326858 | Oscillator circuit with thermal feedback An oscillator circuit which translates energy between electromagnetic energy and thermal energy is disclosed. The control loop of the oscillator includes a feed forward stage and a feedback stage for establishing the necessary conditions for oscillation. ... | 12/04/2001 |
| 6285063 | Resonant circuit having a resonant body mechanically oscillated by electrostatic or magnetic forces The resonant circuit has at least one resonant body of a semiconductor material anchored on the surface of a semiconductor substrate, at least one first electrode being arranged at said semiconductor material, and at least one second electrode. The first ... | 09/04/2001 |
| 6225756 | Power oscillator An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide ... | 05/01/2001 |
| 6091356 | Chirp source with rolling frequency lock for generating linear frequency chirps A source for a linear homodyne transceiver that generates repeated linear chirps. A YIG oscillator with a main coil and an FM coil receives a basic linear current ramp at the main coil to generate a chirp. The FM coil is coupled to receive a PLL error sig... | 07/18/2000 |
| 6054403 | Semiconductive ceramic and semiconductive ceramic element using the same A semiconductive ceramic in which the B constant is maintained at about 4000 K or more at elevated temperature to thereby decrease power consumption, and the B constant is lowered less than 4000 K at low temperature so as to avoid unnecessary increase of ... | 04/25/2000 |
| 6014064 | Heterolithic voltage controlled oscillator A voltage controlled oscillator includes a varactor (201) and a transistor (202) and a ground via (203), of epitaxially grown silicon that is etched to provide respective pedestals embodying the varactor (201) and the transistor (202) and the ground via (... | 01/11/2000 |
| 6009534 | Fractional phase interpolation of ring oscillator for high resolution pre-compensation The present invention includes a fractional interpretation circuit to be used to correct pre-write compensation for writing data on a disk. The present invention need not be limited to a three phase interpreter but could easily be extended to a 4X or 5X. ... | 12/28/1999 |
| 5994971 | Oscillator using a time constant circuit based on cyclic heating and cooling A clock generator or oscillator circuit for use in an integrated circuit for generating a clock signal includes a 555 timer circuit. The time constant circuit of the 555 timer includes a heater element for generating heat and a transducer for converting h... | 11/30/1999 |
| 5900788 | Low-noise oscillator circuit having negative feedback A low-noise oscillator circuit with an amplifier element for negative feedback, specifically a transistor. In addition to a positive feedback of the oscillator transistor, provision is made for a negative-feedback loop with a pass band of 0 (thus DC coupl... | 05/04/1999 |
| 5856764 | Oscillation circuit having an active circuit portion and a surface acoustic wave resonance device An oscillation circuit comprises a surface acoustic wave resonance device of the single port type, an active circuit portion with which the surface acoustic wave resonance device is connected so that a signal feedback from the active circuit portion to th... | 01/05/1999 |
| 5652551 | Method for high frequency device operation with high temperature and radiation hard characteristics Micro-scale and nano-scale devices which achieve high frequency signals ug materials having increased electron saturation velocity. These devices have frequencies in the terahertz range with high temperature and radiation hard characteristics. The transi... | 07/29/1997 |
| 5558800 | Microwave power radiator for microwave heating applications The output matching networks normally included in a microwave power transistor package as well as the transistor combining network therefor are eliminated for heating applications, e.g. microwave ovens. In a preferred embodiment, the transistor dies of fo... | 09/24/1996 |
| 5477198 | Extendible-range voltage controlled oscillator A circuit design extending the range and linearizing the transfer characteristic of a fast voltage controlled oscillator (VCO). In addition, a multi-range VCO is described. Range extension is achieved by modifying the delay cell of a current controlled ri... | 12/19/1995 |
| 5309343 | Driver circuit having paralleled transistors and current-variable resistive elements The present invention is a driving circuit that comprises a magnetically permeable core, a high voltage secondary winding around the core with the secondary winding being connectable to a device to be powered, a circuit connectable to a D.C. power source ... | 05/03/1994 |
| 5304958 | Saw oscillator gain amplifier with auto phase shift A gain stage for providing an automatic phase shift is provided. In particular, the gain stage detects whether an oscillation signal appears at its inputs. If an oscillation signal is not detected, then the gain stage inverts output signals occurring at o... | 04/19/1994 |
