Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7136428 | Systems and techniques for measuring the performance of a communications system Systems and techniques for measuring the performance of a communications channel is disclosed which includes receiving a signal from the communications channel, filtering the signal, estimating a bias introduced by the filtering of the signal, and computing a parame... | 11/14/2006 |
| 7137061 | Method and device for signaling a transmission fault on a data line A method and a configuration produce a fault signal that is suitable for identifying transmission faults when using differential signaling. A first mid-level signal whose potential is in the area of the mid-point between the signal level on a first signal line and a... | 11/14/2006 |
| 7137048 | Method and apparatus for evaluating and optimizing a signaling system A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive... | 11/14/2006 |
| 7133656 | Direct conversion receiver A direct conversion receiver is disclosed wherein a received RF signal is mixed in a mixer with a local oscillation signal having a frequency the same as a desired central frequency, and is down-converted to a base band signal. The receiver comprises a divider for d... | 11/07/2006 |
| 7132965 | High-speed sampling architectures A high-speed sampling system and an analog to digital converter are disclosed. One embodiment of a method of sampling a signal includes receiving an analog signal and generating first samples at a rate of Fs, and generating second sub-samples from the first samples ... | 11/07/2006 |
| 7133419 | System and method for reducing power consumption by spectral shaping of signals The present invention provides a system and method for reducing power consumption by shaping the spectrum of a downstream signal. Incremental improvements in power consumption due to spectral shaping produces a noticeable reduction in the aggregate power consumed at... | 11/07/2006 |
| 7133446 | Performance indicator for wireless digital signal reception A performance indicator for wireless digital signal reception is disclosed. In particular, a method for indicating the reception quality of a wireless digital signal at an electronic device is disclosed. The method includes a series of steps, starting with a first s... | 11/07/2006 |
| 7130328 | Time history display of orthogonal code power levels A time history display of orthogonal code power levels by spreading factor is generated by displaying each data record of code domain power as a line, with each point in the line representing a different code index and the color or brightness of each data point repr... | 10/31/2006 |
| 7129719 | Apparatus for detecting defect in circuit pattern and defect detecting system having the same Provided is an apparatus for detecting a defect of a circuit pattern which includes a resonator, a first power supply unit connected to one end of the resonator to apply power to the resonator, a probe connected to the other end of the resonator to contact one end o... | 10/31/2006 |
| 7127648 | System and method for performing on-chip self-testing A method for determining whether a physical layer device under test is defective may include establishing a closed communication path between a verified physical layer device and the physical layer device under test via an optical interface of the verified physical ... | 10/24/2006 |
| 7126913 | Method and system for managing transmission resources in a wireless communications network A method and system for managing transmission resources in a wireless communications network includes receiving a plurality of packets and determining a time duration for transmission of each packet. A power level for transmission of each packet over the time durati... | 10/24/2006 |
| 7127241 | Method, apparatus and article to remotely associate wireless communications devices with subscriber identities and/or proxy wireless communications devices Apparatus and methods provide remote access to subscriber identity information and subscriber configuration information stored on one or more subscriber identity modules (SIMs), to allow remote configuration of wireless communications devices. A SIM server provides ... | 10/24/2006 |
| 7123373 | Gateway unit, control method thereof, and communication system The present invention provides a gateway unit, a controlling method thereof and a communication system that realize a real-time network facsimile communication in a packet-PSTN network environment at a transmission speed set up between a facsimile apparatus and a pa... | 10/17/2006 |
| 7123000 | Adjacent channel leakage power ratio measuring apparatus, channel power measuring apparatus method, program, and recording medium with recording the program The frequency of an adjacent channel signal is reduced by a down converter (12), wherein the signal (adjacent channel signal) in a predetermined band centered around the adjacent channel frequency passes through a band-pass filter (22). At this time, a... | 10/17/2006 |
| 7123590 | Method and apparatus for testing a wireless link using configurable channels and rates Techniques to test a wireless communication link using configurable channels and rates. A W-Markov test service may be invoked to test and/or verify the performance of the downlink and/or uplink using at least one transport channel for each link. Each transport chan... | 10/17/2006 |
| 7124233 | USB composite device and method using hub link layer and UTMI interface An USB composite device using hub link layer and UTMI interface is disclosed, which connects to a host through an USB cable. The device includes an USB physical layer, a hub link layer and plural functional link layers. The USB physical layer can receive and transmi... | 10/17/2006 |
| 7123846 | Optical receiving device, waveform optimization method for optical data signals, and waveform optimization program for optical data signals This optical receiving device for discriminating and recovering a data signal, which results from converting an optical signal input through a dispersion equalizer into an electrical signal and amplifying it to a pre-determined amplitude, by using a clock and data r... | 10/17/2006 |
| 7123676 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 10/17/2006 |
| 7120408 | Differential signal squelch detection circuit and method An electrical circuit detects a “squelch,” or “out-of-band,” state of a differential signal pair having a positive (“p”) signal line and a negative (“n”) signal line. In one embodiment of the invention, a first and a second comparator each have posit... | 10/10/2006 |
| 7116943 | System and method for classifying signals occuring in a frequency band A system and method for classifying signals occurring in a frequency band. One or more characteristics of one or more signals in the frequency band are detected using any suitable technology, such as a device that can generate characteristics of signal pulses detect... | 10/03/2006 |
| 7116256 | Pulse shaping apparatus and method A system has a first digital-to-analog (D/A) converter to receive a digital signal and to convert the digital signal into an analog pulse, a second D/A converter to cancel residual energy resulting from a previous pulse if a predetermined sequence of digital data is... | 10/03/2006 |
| 7116638 | Method for identifying mis-optioned data communications circuits Methods for identifying a mis-optioned data communications circuit are provided. A test point is configured providing access to a data communications circuit for operation of a first data communications speed. A test is performed on a communications device remotely ... | 10/03/2006 |
| 7116777 | Termination frame with modules and method The present invention relates to a telecommunications connection module including a housing and connection locations mounted to a front face of the housing. The connection locations are removably mounted to the front face allowing access to an interior side of the c... | 10/03/2006 |
| 7114107 | Method for the dynamic control of the channel use of a transmission channel and a load generator for sending a test sequence A method for the dynamic control of the channel use of a transmission channel as well as a load generator for sending a test sequence generates the test sequence with several test patterns in accordance with a communication protocol to be used for transmission, pref... | 09/26/2006 |
| 7113749 | System and method for measuring a high speed signal An apparatus is provided for measuring an output of a high-speed data transmission circuit. The apparatus includes a programmable reference voltage generator operable to generate a reference voltage that is variable between a plurality of levels. The apparatus also ... | 09/26/2006 |
| 7110445 | Oversampled clip-shaping The present invention provides an apparatus, system and method of peak-to-average reduction of an oversampled signal for a digital communication system. Peak detection 504 and width measurement 504 are advantageously combined in which a peak portion or... | 09/19/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7110469 | Self-calibrating direct conversion transmitter A self-calibrating transmitter includes an up-conversion mixing module, summing module, calibration determination module, and a calibration execution module. The up-conversion mixing module is operably coupled to mix an I component of a base-band signal with an I co... | 09/19/2006 |
| 7110768 | Measurement and antenna placement tool for establishing a cell site The present invention provides an apparatus and system for accurately predicting and evaluating cellular system performance before an actual system is installed at a site. In accordance with an embodiment of the invention, only two persons (or under certain conditio... | 09/19/2006 |
| 7110239 | Polarity correction circuit and system incorporating the same A polarity correction circuit including a polarity controller and an inversion circuit. The polarity controller is configured to detect an incorrect polarity in a polarity sensitive signal and provide inversion signal in response to the incorrect polarity. The inver... | 09/19/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7111208 | On-chip standalone self-test system and method A method and system are disclosed for providing standalone built-in self-testing of a transceiver chip. The transceiver chip includes packet generators for generating test packets and packet checkers for comparing received packets with expected packets. The transcei... | 09/19/2006 |
| 7110756 | Automated real-time site survey in a shared frequency band environment An intelligent spectrum management (ISM) system and method that includes sophisticated features to detect, classify, and locate sources of RF activity. The system comprises one or more radio sensor devices positioned at various locations in a region where activity i... | 09/19/2006 |
| 7107170 | Multiport network analyzer calibration employing reciprocity of a device A multiport vector network analyzer calibration employs measurements of an asymmetric reciprocal device to determine a value of a defining parameter of a calibration standard in a set of calibration standards. A method of determining a parameter value determines and... | 09/12/2006 |
| 7107024 | FM modulator output control during turn on The present invention provides a system and a method to prevent undesired sounds during FM modulator turn on. The system includes an RF attenuator circuit, a delay switch circuit, an RF ramp up circuit, and audio ramp up circuit. The RF attenuator circuit significan... | 09/12/2006 |
| 7104851 | Security system for a marine vessel A security system for a marine vessel uses identification values to ascertain whether or not the devices used in a marine vessel control system are those which are expected. If an identification value is received by one device from another device, appropriate operat... | 09/12/2006 |
| 7106790 | Method and apparatus for measuring a signal spectrum A spectrum analyzer used for making a spectrum emission mask measurement reorganizes execution of the measurement so that all frequency bands to be measured at the same resolution bandwidth are measured in a single sweep, extending between the extreme frequency limi... | 09/12/2006 |
| 7106791 | Method and apparatus for monitoring transmission quality In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channe... | 09/12/2006 |
| 7106834 | Digital subscriber line diagnostic system A communication device transmits very low frequency signals in order to help diagnose the cause of a communication problem in a DSL communication system. The communication problem may be, for example, the inability of a remote data transceiver unit (DTU-R) to succes... | 09/12/2006 |
| 7103116 | Detection of a false detection of a communication packet A method for detecting a false detection of a packet. The method includes generating a frequency domain representation of a signal, the frequency domain representation including a plurality of complex values each of which is associated with a subcarrier. The method ... | 09/05/2006 |
