Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7456682 | Demodulator and phase compensation method thereof The exemplary demodulator of the present invention can eliminate effectively a phase fluctuation which cannot be fully eliminated by a carrier recovery loop (feedback loop), with subsequent feed-forward phase compensation loop which shares a phase detector of the ca... | 11/25/2008 |
| 7426243 | Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers Systems and methods for receiving non-coherent layered modulation signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital c... | 09/16/2008 |
| 7394874 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 07/01/2008 |
| 7352831 | Digital frequency measurement system and method with automatic frequency control A digital frequency measurement system including first and second digital differentiators responsive to first and second digital quadrature signals representative of first and second quadrature modulated input signals that represent binary data having a center frequ... | 04/01/2008 |
| 7352411 | Digital IF demodulator A digital IF demodulator includes an analog-to-digital (A/D) converter that receives an analog IF signal and converts it to a digital IF signal. A parallel multiplier then down-converts the digital IF signal to a baseband signal having a video component and an audio... | 04/01/2008 |
| 7349491 | Frequency shaping stream signal processor A signal processor has a plurality of channels, each channel configured to receive an input signal stream, to reduce the signal to a direct current signal and to process the signal according to the stream signal. Each channel also has a plurality of low pass filters... | 03/25/2008 |
| 7324783 | Method, arrangement and communication receiver for SNIR estimation A method, arrangement (512) and communication receiver (500) for SNIR estimation of a received signal, by: deriving (512A) an estimation {circumflex over (Z)} of SNIR of the received signal in accordance with the relation ... | 01/29/2008 |
| 7315584 | Coherent receiver A coherent receiver receives a set of signals which are spaced in phase, or phase and polarization, and a reference signal. The receiver processes the set of signals to determine which of the set of signals has a predetermined association (e.g. closest in phase) wit... | 01/01/2008 |
| 7295049 | Method and circuit for rapid alignment of signals Circuits and methods for aligning two or more signals including a first and second signal. In one embodiment, a shift register generates two or more shifted copies of the second signal, and each of a plurality of phase detectors receives the first signal and one of ... | 11/13/2007 |
| 7283011 | Method for performing dual phase pulse modulation A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2 | 10/16/2007 |
| 7280619 | Method and apparatus for compensating I/Q imbalance in receivers A method and apparatus for compensating I/Q imbalance in receivers is described. The method includes determining a difference between energies of two quadratures, correcting an amplitude imbalance using the difference between the energies of two quadratures, determi... | 10/09/2007 |
| 7274636 | Phase locked loop for generating an output signal A phase locked loop (PLL) for generating an output signal according to an input signal is disclosed. The PLL of the present invention includes a detector for generating a detection signal according to the logical difference between the input signal and a feedback si... | 09/25/2007 |
| 7263059 | High-frequency receiving apparatus having wide frequency pull-in range A high-frequency receiving apparatus includes a phase pull-in circuit controlling an oscillator so as to eliminate a phase difference, a frequency pull-in circuit controlling the oscillator so as to eliminate a frequency difference, a frequency shift circuit shiftin... | 08/28/2007 |
| 7245671 | Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers Systems and methods for receiving non-coherent layered modulation signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital c... | 07/17/2007 |
| 7239431 | System and method for recovering primary channel operation in a facsimile receiver and facsimile machine incorporating the same A system for, and method of recovering primary channel operation in a facsimile (fax) receiver and a fax machine that incorporates the system, the method or both. In one embodiment, the system includes: (1) a signal receiver that receives a signal containing first a... | 07/03/2007 |
| 7233774 | RF transceiver with compact stacked mixer design for multiple frequency conversion A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to wideband RF signals prior to transmission without requiring conversion to an intermed... | 06/19/2007 |
| 7194044 | Up/down conversion circuitry for radio transceiver A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified ... | 03/20/2007 |
| 7180960 | Phase error corrector and method A phase error corrector circuit and method are disclosed. In one embodiment, a phase error corrector circuit delays a PSK modulated signal and multiplies the delayed PSK modulated signal by the PSK modulated signal in order to generate a forward phase correction sig... | 02/20/2007 |
| 7177371 | Methods and apparatus for transmitting and receiving data over a communications network in the presence of interference It is becoming increasingly important to improve data throughput in wireless networks. By transmitting data simultaneously at different modulation amplitudes and/or using different code strengths, terminals having different carrier to noise ratios are able to decode... | 02/13/2007 |
| 7173981 | Dual layer signal processing in a layered modulation digital signal system Systems and methods for receiving layered modulation for digital signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital co... | 02/06/2007 |
| 7151919 | Method for forming an intermediate frequency signal in a mixer, and a mixer The invention relates to a method for forming at least two intermediate frequency signals with different phases in a mixer (1), to which a first signal (RF) and a second signal (LO) are conducted. According to the method, the first intermediate frequency sign... | 12/19/2006 |
| 7145894 | Continuously adjusted-bandwidth discrete-time phase-locked loop A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal... | 12/05/2006 |
| 7109787 | High-efficiency circuit for demodulating carriers in quadrature A demodulation circuit for demodulating a received signal including carriers in quadrature modulated by digital signals and/or in which the processing is performed on two carriers in quadrature. The circuit includes a demodulator, an analog-to-digital converter, a c... | 09/19/2006 |
| 7110476 | Demodulation and modulation circuit and demodulation and modulation method A demodulation circuit and a demodulation method can optimize sampling timing with achieving reduction of power consumption. A preliminarily known signal is inserted in the digital transmission signal upon transmission. The demodulation circuit includes A/D converti... | 09/19/2006 |
| 7103110 | Dual phase pulse modulation encoder circuit An dual phase pulse modulation (DPPM) encoder circuit converts data into a series of high and low signal pulses, each of whose time durations or pulse widths represents a group of M data bits, with the alternating high and low pulses representing successive groups. ... | 09/05/2006 |
| 7092458 | Carrier recovery circuit and lock detection circuit for mixed PSK signals A BPSK phase detection unit assumes that an input signal is a BPSK modulated signal in detecting a phase error of a recovered carrier and an 8PSK phase detection unit assumes that the input signal is an 8PSK modulated signal in detecting the phase error of the recov... | 08/15/2006 |
| 7085501 | Coherent optical receiver A coherent optical intradyne receiver is described which comprises an optical image reject mixer capable of dividing, mixing and recombining signals from three inputs so as to produce an inphase and a quadrature channel. On each of the channels a same set of image p... | 08/01/2006 |
| 7081783 | Method and apparatus for generating and controlling a multiphase clock Multiphase clock generating apparatus includes a multiplexer selecting one of a generated clock and a gated generated clock as an M-clock in accordance with a halt multiplexer control. Divider circuitry provides an alignment signal corresponding to an inverted M-clo... | 07/25/2006 |
| 7082293 | Adaptive radio transceiver with CMOS offset PLL An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 07/25/2006 |
| 7079577 | Wide window decoder circuit for dual phase pulse modulation A dual phase pulse modulation (DPPM) decoder circuit processes a DPPM signal, which is in the form of a series of high and low pulses whose pulse widths represent successive groups of M data bits, so as to recover data carried by the signal. Each of the 2M | 07/18/2006 |
| 7079591 | Method and system for recovering information from a magnetic field signal usable for locating an underground object A data recovery subsystem for use in a receive system configured to receive a magnetic field signal, the magnetic field signal including a carrier component usable for locating an underground object and at least one modulation sideband. The data recovery subsystem i... | 07/18/2006 |
| 7079614 | Method of generating a measure of a mistiming and apparatus therefor Known apparatus for measuring jitter in a signal under test employ narrowband filters and limiters that have technological limitations when the bit rate of the signal under test is around 40 Gbps. The present invention avoids the use of the above-mentioned elements ... | 07/18/2006 |
| 7075351 | Method and apparatus for generating a multiphase clock A multiphase clock generating apparatus includes a clock generator providing an M-clock having a frequency M times that of a received reference clock. Divider circuitry is coupled to provide an alignment signal having 1/M the frequency of the M-clock. A recovery cir... | 07/11/2006 |
| 7068950 | Correcting misalignment between data and a carrier signal in transmitters A device and technique for aligning an optical carrier signal (e.g., a soliton pulse train) with a data signal in a transmitter. According to the invention, the device is configured to analyze the radio frequency (RF) spectrum of the transmitter's output. In one imp... | 06/27/2006 |
| 7054012 | Spectral phase measurement using phase-diverse coherent optical spectrum analyzer Embodiments in accordance with the invention provide an optical spectrum analyzer. The optical spectrum analyzer includes a receiver for receiving an optical local oscillator signal and an unknown optical signal. The receiver outputs three or more phase-diverse hete... | 05/30/2006 |
| 7054778 | Method and device for processing analogue output signals from capacitive sensors An analogue output signal of a sensor which comprises a carrier signal with a carrier frequency ωC which is modulated by a measurement size is sampled with a sampling frequency ωA to receive a sampled sensor output signal. The frequency ω | 05/30/2006 |
| 7053682 | Device and method for clock generation A clock generator includes an interface for receiving a plurality of n periodical signals of the same frequency which are phase-shifted with respect to each other, wherein n/3. Further, a clock signal generator is provided for generating respective clock edges of a ... | 05/30/2006 |
| 7038607 | Modulation circuit having improved performance in the audio band A modulator circuit receives a modulator input signal and produces a mapper output signal. The modulator circuit includes a filter circuit that generates an output that is a function of the modulator input signal and of the mapper output signal. A quantizer receives... | 05/02/2006 |
| 7035364 | Digital receiver fast frequency and time acquisition system using a single synchronization word and method of using same A digital receiver fast frequency and time acquisition system (200) for accurately providing both time and frequency synchronization to an incoming data stream with minimal delay to prevent any loss of incoming digital information. The invention provides sync... | 04/25/2006 |
| 7024599 | System and method for non-causal channel equalization A system and method are provided for non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing thresholds to distinguish a first bit estimate; comparing the first bit estima... | 04/04/2006 |
