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| Number | Title | Issue Date |
| 8148680 | Ion transfer arrangement with spatially alternating DC and viscous ion flow A method of transporting gas and entrained ions between higher and lower pressure regions of a mass spectrometer comprises providing an ion transfer conduit 60 between the higher and lower pressure regions. The ion transfer conduit 60 includes an elect... | 04/03/2012 |
| 8148679 | Efficient atmospheric pressure interface for mass spectrometers and method An ion transfer arrangement for transporting ions between higher and lower pressure regions of the mass spectrometer comprises an ion transfer conduit 60. The conduit 60 has an inlet opening towards a relatively high pressure chamber 40 and an o... | 04/03/2012 |
| 8141411 | Method for determining a low cylinder pressure condition for a gas chromatograph A method for determining a low cylinder pressure condition of a gas chromatograph includes providing gas from the cylinder to an inlet of the gas chromatograph. In particular, the gas is provided at a predetermined inlet pressure that is higher than an inlet pressur... | 03/27/2012 |
| 7987060 | Identifying peaks in mass spectrometry data A method of processing Fourier Transform Mass Spectrometry (FTMS) data includes performing a Fourier Transform of a part of a time domain transient and identifying from that transformed data signal peaks representative of the presence of ions. After peak identificat... | 07/26/2011 |
| 7858934 | Quadrupole FAIMS apparatus A combined rf-only/FAIMS apparatus is disclosed for use in mass spectrometry and other applications. The disclosed apparatus includes a plurality of curved electrodes arranged around a central ion transmission channel. FAIMS functionality is removed electronically w... | 12/28/2010 |
| 7372249 | Load measurement for a thermal microwave power sensor A thermocouple power sensor includes the ability to monitor the value of a RF load resistor. A meter connects to the input of a thermocouple-based RF signal power detector. The apparatus can sense its own load resistor DC impedance, so it can detect both aging in an... | 05/13/2008 |
| 6989711 | Sectional power/voltage/current limiter for a multi-phase amplifier A power splitter receives power and has a first and second power output. The first power output is connected first power limiting section. A first matching circuit connects between an output of the first power limiting section and a first phase shifter. A second pha... | 01/24/2006 |
| 6931259 | Integrated circuit architecture for programmable wireless device The present invention is an integrated system on a chip that combines wireless, graphics, and multimedia. The graphics and multimedia features may be programmed by the end user while restricting programmability of the wireless features. ... | 08/16/2005 |
| 6924698 | Power detector for mismatched load A method for measuring the forward power output of an amplifier with improved accuracy with a mismatched load based on probing the amplitude of the AC voltage and current in the final amplifier stage. Amplitudes are combined resulting in a composite reading that is ... | 08/02/2005 |
| 6879224 | Integrated filter and impedance matching network A filter and impedance matching network uses acoustic resonators in place of capacitors. A resonator, e.g. FBAR, behaves similar to a capacitor outside of its resonant frequency and so does not impact the function of the network, outside of its resonant frequency. A... | 04/12/2005 |
| 6845231 | Method facilitating inter-mode handoff A cellular handset supports non compressed handover for different frequency ranges, and different wireless standards. ... | 01/18/2005 |
| 6774857 | Method facilitating inter-mode handoff A cellular handset supports simultaneous service for different frequency ranges, and different wireless standards. ... | 08/10/2004 |
| 6763486 | Method and apparatus of boundary scan testing for AC-coupled differential data paths Boundary scan testing methods that detect manufacturing defects in AC-coupled differential pairs may be based on a selected signal parameter: phase or frequency. The data is encoded by the signal parameter. In one embodiment, the signal parameter is compared to refe... | 07/13/2004 |
| 6718085 | Stable optical switch with reduced power consumption The optical switch operates in two stages. In the first stage, the bubble is “blown” into the trench. In the second stage, the sidewalls are heated to achieve a dry wall condition by improving the thermal transfer path from the heat source to the reflecting wall... | 04/06/2004 |
| 6704183 | Fault detection in a LED bias circuit A bias circuit for preventing excessive emission from light emitting diodes includes a switch connected to power. A light emitting diode connects to the switch output. Two bias current legs, electrically connected in parallel, interpose the light emitting... | 03/09/2004 |
| 6561618 | Service station for printers having firing nozzles perpendicular to direction of carriage motion A thermal inkjet printer with firing nozzles perpendicular to the carriage motion has two motors: paper and carriage. These motors, alone or in concert, provide the power to the service station. The service station has separate wiping and pen cleaning fun... | 05/13/2003 |
| 6563753 | Sense amplifier with independent write-back capability for ferroelectric random-access memories A sensing circuit with independent write-back capability includes a write back function block having a write-back output signal, a sense amplifier that receives an input and a reference signal. The sense amplifier generates an output signal and the write ... | 05/13/2003 |
| 6459828 | Rearrangeable optical add/drop multiplexor switch with low loss An optical switch array has row and column waveguide segments, on a waveguide substrate. Each waveguide segment terminates in a trench positioned in one of two patterns. In the first pattern, the trenches are positioned along the diagonal while in the sec... | 10/01/2002 |
| 6452370 | Low noise biasing technique The present invention provides gate bias to an enhancement mode field effect transistor.... | 09/17/2002 |
| 6387736 | Method and structure for bonding layers in a semiconductor device A structure and a method for providing structural stability at an interface between two poorly adhering layers in a semiconductor device involve providing anchoring channels in one of the poorly adhering layers through which the other poorly adhering laye... | 05/14/2002 |
| 6380976 | Drive circuit with over-voltage protection for use with pixel cells and other circuits A drive circuit that produces an over-voltage signal and protects circuit components from the over-voltage signal (i.e., such that circuit components operate within process specification limits). A photosensitive pixel cell can be driven by the drive circ... | 04/30/2002 |
| 6351236 | Combined GPS and CDMA in a mobile transceiver This novel mobile CDMA station incorporates the global positioning system (GPS). Two modes of operation are possible. One, during GPS operation, there is no transmission or reception of CDMA services. Two, simultaneous CDMA transmissions and reception of ... | 02/26/2002 |
| 6259121 | Monolithic multiple wavelength VCSEL array An array of n-wavelength vertical cavity surface emitting lasers (VCSELs) can be grown with precise and repeatable wavelength control. First, a foundation VCSEL structure is grown on a substrate. Next, n-paired layers of AlGaAs and InGaP are grown, where ... | 07/10/2001 |
| 6167457 | Message filters, automatic binding, and encoding for distributed systems A method for establishing bindings in distributed systems is based on a relational characterization interface (RCI) that includes the following fields: ensemble, message type, and variable name. Optional fields may be specified such as time stamp, units, ... | 12/26/2000 |
| 6166374 | Molded spring gap setting mechanism for optical encoders The present invention is technique for setting the codewheel gap that is quick and requires no parts beyond what is needed for encoder operation. The gapping mechanism is incorporated into the encoder cover and maintains solid contact between the base and... | 12/26/2000 |
| 6117699 | Monolithic multiple wavelength VCSEL array An array of n-wavelength vertical cavity surface emitting lasers (VCSELs) can be grown with precise and repeatable wavelength control. First, a foundation VCSEL structure is grown on a substrate. Next, n-paired layers of AlGaAs and InGaP are grown, where ... | 09/12/2000 |
| 6055286 | Oversampling rotational frequency detector This invention provides a simple yet robust solution to the phase-locked loop frequency acquisition problem in clock and data recovery circuits by using a frequency detector with a deadband, which is constructed in part with an oversampling rotational fre... | 04/25/2000 |
| 5998784 | Absolute position detection within 1 revolution using 3-channel incremental encoders with high resolution track The quasi-absolute encoder module determines absolute position within one mechanical rotation. The encoder module includes a three channel position encoder and detection circuitry that includes a read-only memory (ROM). There are three channels: A, B, and... | 12/07/1999 |
| 5978753 | Context parameters for establishing data communication patterns in a distributed control and measurement system A method for initializing a distributed measurement and control system that establishes communication bindings based on context parameters measured or acquired by the nodes.... | 11/02/1999 |
| 5971545 | Light source for projection display A compact and energy efficient projection display can be made by starting with relatively pure red, green, and blue light sources. The output beams of the colored light sources are received by at least one spatial light modulator. The modulated output bea... | 10/26/1999 |
| 5960136 | Shielded fiber optic connector A conductive shield is formed around a fiber-optic connector. The shield includes a compressible means that encircles the perimeter of the connector. When the connector is inserted, the compressible means electrically contact the chassis to prevent emissi... | 09/28/1999 |
| 5939712 | Absolute position detection within 1 revolution using 3-channel incremental encoders with high resolution index track The quasi-absolute encoder module determines absolute position within one mechanical rotation. The encoder module includes a three channel position encoder and detection circuitry that includes a read-only memory (ROM). There are three channels: A, B, and... | 08/17/1999 |
| 5917202 | Highly reflective contacts for light emitting semiconductor devices Light emitting diodes with highly reflective contacts and methods for fabricating them are described. In a first preferred embodiment of the present invention, LEDs with reflective contacts are formed using a laser to create small alloyed dots in a highly... | 06/29/1999 |
| 5909037 | Bi-level injection molded leadframe A x-y array of light emitting diodes has insert molded leadframes to minimize manufacturing costs during assembly.... | 06/01/1999 |
| 5852689 | Method for making fluid optical switches The method builds upon the highly repeatable properties of commercial optical fiber, and using commercial fiber for the waveguides in a fabric of optical switches. The method describes assembly of the fabric, locating the intersections, and a structure fo... | 12/22/1998 |
| 5825117 | Second harmonic imaging transducers A harmonic imaging transducer is a structure of two mechanically coupled piezoelectric layers. This two-layer piezoelectric structure may vibrate either in a symmetric mode, wherein the two layers are expanding and contracting in unison, or in an anti-sym... | 10/20/1998 |
| 5793884 | Spectral based color image editing A color image editing system and method uses sensor responses in an image capture device to estimate and separate illuminant and surface reflectance in a scene. The system uses the estimated surface reflectances, along with a desired illuminant SPD, to ca... | 08/11/1998 |
| 5779924 | Ordered interface texturing for a light emitting device This method relates to the fabrication of semiconductor light-emitting devices having at least one ordered textured interface. Controlled interface texturing with an ordered pattern is provided on any or all interfaces of such a device to enhance light ex... | 07/14/1998 |
| 5748313 | Signal-to-noise ratio of second harmonic interferometers The signal-to-noise ratio of the correction signal used for second harmonic interferometry is improved in two ways. First, an optical amplifier, tuned to the second harmonic frequency, is positioned in the optical path. Second, a doubling stage is positio... | 05/05/1998 |
| 5735281 | Method of enhancing and prolonging the effect of ultrasound contrast agents Ultrasound energy has been observed to rapidly destroy a large quantity of microbubbles. The duration and intensity of the contrast effect is greatly diminished by conventional imaging frame rates and power levels. Altering the imaging sequence by strateg... | 04/07/1998 |
