Patent application number | Description | Published |
20100199673 | Gas Turbine Engine with Eductor and Eductor Flow Distribution Shield - A gas turbine engine comprises: a combustor with an aft end exhaust nozzle that discharges along an axis of the combustor; an eductor with a housing that circumscribes the combustor that has a sideward eductor inlet that intakes generally normal to the combustor axis and an aft end eductor outlet that circumscribes the combustor exhaust nozzle and exhausts along the combustor axis; and an eductor distribution shield mounted within the eductor housing between the eductor inlet and the combustor with a deflection surface that deflects the intake of the eductor inlet around the combustor. | 08-12-2010 |
20110272553 | REMOVABLE GAS TURBINE ENGINE STAND - A removable stand assembly for a gas turbine engine includes a first stand removably mountable to a gas turbine engine on one side of a center of gravity of the gas turbine engine and a second stand removably mountable to the gas turbine engine on a second side of the center of gravity of the gas turbine engine. | 11-10-2011 |
20120006151 | APU FUEL FILTER HOUSING SCUPPER - An auxiliary power unit includes a gearbox housing portion and a filter housing portion providing an integral housing. A filter cavity is provided in the filter housing portion. A surface circumscribes the filter cavity. A scupper includes a passage extending from the surface to an opening on an exterior surface of the integral housing. A sealing region between the scupper and the filter cavity is configured to fluidly isolate the scupper and the fuel filter cavity from one another. In one example, the filter cavity receives a fuel filter cartridge. A cap is secured to the filter housing portion and encloses the filter cavity when in a secured position. | 01-12-2012 |
20120023889 | AUXILIARY POWER UNIT FIRE ENCLOSURE - A fire enclosure for an auxiliary power unit having a hot zone formed by a gas turbine comprises an annular fire enclosure body, an axial expansion joint and a radial expansion joint. The annular fire enclosure body is configured to encapsulate the hot zone. The fire enclosure includes a first end and a second end. The axial expansion joint is connected to the first end. The radial expansion joint is connected to the second end. | 02-02-2012 |
20120023896 | AUXILIARY POWER UNIT FIRE ENCLOSURE DRAIN - A drain assembly for an auxiliary power unit having a hot zone formed by a combustor case comprises a fire enclosure, a drain fitting and an orifice. The fire enclosure encapsulates the hot zone. The drain fitting connects to the fire enclosure. The orifice extends from the combustor case into the drain fitting to form an expansion joint. | 02-02-2012 |
20120023897 | AUXILIARY POWER UNIT FIRE ENCLOSURE DRAIN SEAL - A drain assembly for an auxiliary power unit having a hot zone formed by a combustor case comprises a fire enclosure, a drain fitting, a discharge port and a piston seal. The fire enclosure encapsulates the hot zone of the combustor case. The drain fitting connects to the fire enclosure. The discharge port extends from the combustor case into the drain fitting. The piston seal is positioned between the drain fitting and the discharge port. | 02-02-2012 |
20120023967 | AUXILIARY POWER UNIT WITH HOT SECTION FIRE ENCLOSURE ARRANGEMENT - A Hot Section Fire Enclosure for a gas turbine engine according to an exemplary aspect of the present disclosure includes a multiple of supports mounted between a Hot Section Fire Enclosure support ring and a shroud, at least one of the supports includes a hollow support pin which spaces the Hot Section Fire Enclosure support ring relative the shroud. | 02-02-2012 |
20130015291 | FIRE RESISTANT STRUCTURAL MOUNT YOKE AND SYSTEMAANM DeDe; Brian C.AACI San DiegoAAST CAAACO USAAGP DeDe; Brian C. San Diego CA USAANM Lau; DavidAACI San DiegoAAST CAAACO USAAGP Lau; David San Diego CA USAANM Jewess; Gordon F.AACI RzeszowAACO PLAAGP Jewess; Gordon F. Rzeszow PL - A mount yoke assembly comprises a first main hanger bracket and a first anchor bracket. The first main hanger bracket includes a first receiving portion for a first auxiliary power unit (APU) mount with first and second hanger arms. The first hanger arm includes a first hanger flange extending proximate a distal end of the first hanger arm. The first anchor bracket includes a first plurality of anchor holes and a first anchor flange. The first plurality of anchor holes are disposed substantially along a length of the first anchor bracket for securing the mount yoke assembly to a component of an APU assembly. The first anchor flange extends from the first anchor bracket for hingeably securing the first anchor bracket to the first main hanger bracket. | 01-17-2013 |
Patent application number | Description | Published |
20090276639 | DYNAMIC FREQUENCY SCALING OF A SWITCHED MODE POWER SUPPLY - System(s) and method(s) are provided for dynamically scaling switching frequencies and clock sources of switched mode power supplies (SMPSs) in a mobile station. Switching frequency is scaled to an optimal value in response to at least one of (i) a change in mode of operation for wireless communication employed by the mobile station, an additional mode of operation is triggered, (ii) a change in operation conditions of a set of loads associated with functionality of the mobile is determined, or (iii) an LO spur set-off by a SMPS in the presence of an interference signal with a frequency splitting from an operational band that matches the SMPS frequency or at least one of its harmonics. Switching frequencies can be selected from a lookup table, or through an analysis of switching frequencies available to the mobile and operational criteria. A set of clock sources can provide an ensemble of switching frequencies. | 11-05-2009 |
20100316098 | APPARATUS AND METHOD FOR DYNAMIC SCALING OF ADC SAMPLING RATE TO AVOID RECEIVER INTERFERENCE - A method and apparatus for avoiding receiver interference is described herein. One or more potential interferers are determined and the frequency associated with the interferers is also determined A desired sampling frequency for the receiver is calculated to avoid the potential interferers. | 12-16-2010 |
20110044380 | DYNAMICALLY CHANGING A TRANSMITTER SAMPLING FREQUENCY FOR A DIGITAL-TO-ANALOG CONVERTER (DAC) TO REDUCE INTERFERENCE FROM DAC IMAGES - A method for interference reduction is described. The method is implemented in a wireless device. It is determined that a page is going to be received via a secondary receiver. It is also determined that a digital-to-analog converter (DAC) image from a transmitter will cause interference with the secondary receiver when the page is received. A sampling frequency of the DAC for the transmitter is changed so that there are not any DAC images from the transmitter that will cause interference with the secondary receiver. | 02-24-2011 |
20110292855 | DYNAMIC CLOCK BUFFER POWER OPTIMIZATION BASED ON MODES OF OPERATION - Circuitry configured for dynamically adjusting clock signal quality based on an operating mode for power savings is described. The circuitry includes clock generation circuitry. The circuitry also includes mode control circuitry. The mode control circuitry provides a drive signal based on an operating mode. The circuitry also includes clock buffer circuitry coupled to the clock generation circuitry and to the mode control circuitry. The clock buffer circuitry adjusts a clock signal quality based on the drive signal. | 12-01-2011 |
20110299434 | REDUCING POWER CONSUMPTION BY TAKING ADVANTAGE OF SUPERIOR IN-CIRCUIT DUPLEXER PERFORMANCE - Although the duplexer in a full-duplex transceiver circuit may only be guaranteed by the duplexer manufacturer to have a transmit band rejection from its TX port to its RX port of a certain amount, and may only be guaranteed to have a receive band rejection of another amount, the actual transmit band rejection and the actual receive band rejection of a particular instance of the duplexer may be better than specified. Rather than consuming excess power in the receiver and/or transmitter in order to meet performance requirements assuming the duplexer only performs as well as specified, the duplexer's in-circuit performance is measured as part of a transmitter-to-receiver isolation determination. Transmitter and/or receiver power settings are reduced where possible to take advantage of the measured better-than-specified in-circuit duplexer performance, while still meeting transceiver performance requirements. Power settings are not changed during normal transmit and receive mode operation. | 12-08-2011 |
20110300914 | REDUCING POWER CONSUMPTION BY IN-CIRCUIT MEASUREMENT OF RECEIVE BAND ATTENUATION AND/OR NOISE - Although the duplexer in a full-duplex transceiver circuit may only be guaranteed by the duplexer manufacturer to have a transmit band rejection from its TX port to its RX port of a certain amount, and may only be guaranteed to have a receive band rejection of another amount, the actual transmit band rejection and the actual receive band rejection of a particular instance of the duplexer may be better than specified. Rather than consuming excess power in the receiver and/or transmitter in order to meet performance requirements assuming the duplexer only performs as well as specified, the duplexer's in-circuit performance is measured as part of a transmitter-to-receiver isolation determination. Transmitter and/or receiver power settings are reduced where possible to take advantage of the measured better-than-specified in-circuit duplexer performance, while still meeting transceiver performance requirements. Power settings are not changed during normal transmit and receive mode operation. | 12-08-2011 |
20130229954 | FREQUENCY SYNTHESIZER ARCHITECTURE IN A TIME-DIVISION DUPLEX MODE FOR A WIRELESS DEVICE - A dual frequency synthesizer architecture for a wireless device operating in a time division duplex (TDD) mode is disclosed. In an exemplary design, the wireless device includes first and second frequency synthesizers. The first frequency synthesizer generates a first oscillator signal used to generate a first/receive local oscillator (LO) signal at an LO frequency for the receiver. The second frequency synthesizer generates a second oscillator signal used to generate a second/transmit LO signal at the same LO frequency for the transmitter. The two frequency synthesizers generate their oscillator signals to obtain receive and transmit LO signals at the same LO frequency when the wireless device operates in the TDD mode. | 09-05-2013 |
20140270032 | Phase Detection and Correction for Non-Continuous Local Oscillator Generator - Techniques for detecting and correcting phase discontinuity of a local oscillator (LO) signal are disclosed. In one design, a wireless device includes an LO generator and a phase detector. The LO generator generates an LO signal used for frequency conversion and is periodically powered on and off. The phase detector detects the phase of the LO signal when the LO generator is powered on. The detected phase of the LO signal is used to identify phase discontinuity of the LO signal. The wireless device may further include (i) a single-tone generator that generates a single-tone signal used to detect the phase of the LO signal, (ii) a downconverter that downconverts the single-tone signal with the LO signal and provides a downconverted signal used by the phase detector to detect the phase of LO signal, and (iii) phase corrector that corrects phase discontinuity of the LO signal in the analog domain or digital domain. | 09-18-2014 |
Patent application number | Description | Published |
20090291649 | In-phase and quadrature-phase signal amplitude and phase calibration - In-phase (I) and quadrature-phase (Q) signals are corrected for both amplitude and phase imbalances by passing the I and Q signals successively through a first amplitude correction stage, a sum-difference stage, and a second amplitude correction stage. The first amplitude correction stage balances the signal levels of the I and Q signals. The sum-difference stage produce a sum of the input I and Q signals, and a difference of the input I and Q signals, resulting in ideal quadrature in the outputs produced. The second amplitude correction stage corrects the amplitude differences from the sum-difference stage. Circuit configurations are used that minimize errors produced by the signal processing stages. | 11-26-2009 |
20130278304 | Apparatuses and Methods for Conversion of Radio Frequency (RF) Signals to Intermediate Frequency (IF) Signals - Various embodiments implement apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals. More particularly, some embodiments are directed toward down conversion of RF signals to IF signals in a multi-band radio receiver, such as a satellite receiver, using a single oscillator for different frequency bands. For example, some of the apparatuses and methods presented are suitable for integration into monolithic RF integrated circuits in low-cost satellite receivers for home entertainment use. | 10-24-2013 |
20150030105 | SUPPRESSION OF SPURIOUS HARMONICS GENERATED IN TX DRIVER AMPLIFIERS - The transmission path of a communication device includes, in part, N upconverters each of which receives M phases of a signal to be transmitted. Each upconverter further receives one of N sets of phases of a LO signal. Each of the N sets includes M phases of the LO signal. The communication device further includes at least one combiner, and N amplifiers each responsive to a different one of the N upconverters to generate N amplified signals. The combiner combines the N amplified signals to generate an output signal. By selecting the gain of one of the amplifiers to be different than the gain of the remaining amplifiers, the undesired harmonics of the signal to be transmitted, caused by non-linearity of the amplifiers, is reduced. Each upconverter optionally includes a multitude of upconverters whose outputs are combined to further reduce the spurious harmonic upconversion products and the counter-intermodulation distortion (IM3). | 01-29-2015 |
20150063509 | BLOCKER FILTERING FOR NOISE-CANCELLING RECEIVER - Techniques for improving rejection of out-of-band interference in a noise-cancelling receive architecture. In an aspect, capacitors blocking in-band signals and passing through out-of-band signals destructively couple an auxiliary mixer output to a mixer output. In a further aspect, cross-coupling capacitors are provided to couple a first signal path with a second signal path of the noise-cancelling receive signal path. Baseband poly phase cross-coupling blocker filtering is further provided for out-of-band interference cancellation to create notch responses at blocker offset frequencies. The techniques disclosed may readily be adapted for multi-phase local oscillator systems. | 03-05-2015 |