Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7557647 | Heterodyne receiver using resonant structures An electronic receiver for decoding data encoded into electromagnetic radiation (e.g., light) is described. The light is received at an ultra-small resonant structure. The resonant structure generates an electric field in response to the incident light and light rec... | 07/07/2009 |
| 7430247 | Carrier frequency detection for N-ary phase modulated signal Carrier frequency detection for an N-ary modulated signal is achieved by digitizing the N-ary modulated signal, frequency shifting the digitized N-ary modulated signal to prevent aliasing, raising the frequency-shifted signal to the Nth power, transformin... | 09/30/2008 |
| 7342441 | Heterodyne receiver array using resonant structures An electronic receiver array for decoding data encoded into electromagnetic radiation (e.g., light) is described. The light is received at an ultra-small resonant structure. The resonant structure generates an electric field in response to the incident light and lig... | 03/11/2008 |
| 7251295 | Apparatus for recovering carrier An apparatus for recovering a carrier is disclosed, for recovering a carrier correctly even though ghost exists in a signal received in a television, which includes a signal converter outputting baseband I, Q signals by multiplying digitized passband I, Q signals by... | 07/31/2007 |
| 7164651 | Wireless computer network including a mobile appliance containing a single chip transceiver A wireless computer data network includes several untethered mobile units that make ad-hoc data connections with an Internet-connected base station using the IEEE-802.11a standard. Each unit includes a radio transceiver fully integrated on a single semiconductor chi... | 01/16/2007 |
| 7109788 | Apparatus and method of improving impedance matching between an RF signal and a multi- segmented electrode An apparatus and method of improving impedance matching between a RF signal and a multi-segmented electrode in a plasma reactor powered by the RF signal. The apparatus and method phase shifts the RF signal driving one or more electrode segment of the multi-segmented... | 09/19/2006 |
| 7064585 | Detecting peak signals In one embodiment, the present invention includes an apparatus having a threshold detector with a current comparator to determine if an input signal exceeds a threshold. The input signal may be obtained from a received optical signal and may be compared to a referen... | 06/20/2006 |
| 7012245 | Calculation of sensor array induced phase angle A sensor array employs a parameter to induce a time-varying phase angle φ on an optical signal that comprises a phase generated carrier. The phase angle φ is calculated through employment of only four samples, where all the four samples are based on the optical si... | 03/14/2006 |
| 7006562 | Phase demodulator, phase difference detector, and interferometric system using the phase difference detector A phase demodulator is used for measuring a phase difference between a phase-modulated test signal and a phase-modulated reference signal having fixed carrier frequencies. The phase demodulator includes an amplitude control device for adjusting amplitudes of the tes... | 02/28/2006 |
| 6952239 | Sine generation circuit, phase shift circuit and tint adjustment circuit A phase shift circuit includes a first sine generation circuit generating a sine-converted output signal (sin θ) of the phase shift input signal (θ) and a reversed sine-converted output signal (−sin θ) of the phase shift input signal (θ), a cosine generation c... | 10/04/2005 |
| 6782058 | Device and method for interpolated signal resampling between sampling clock cycles A circuit for demodulating a modulated carrier includes a sampler receiving the modulated carrier signal and generating a digital carrier signal represented by a sequence of sample values in accordance with a clock signal at a first sampling frequency. A complex mix... | 08/24/2004 |
| 6700940 | Carrier reproduction circuit A carrier reproduction circuit which can perform stable carrier reproduction even when reception takes place with low C/N values is provided. The reception phase of the demodulated known-pattern reception signal is detected with a frame synchronizing timi... | 03/02/2004 |
| 6512799 | Digital communication system and method for increased bit rates A digital communication system and method is provided for increasing bit-rates while maintaining the reliability of transmitted digital information and avoiding increased power demands. The communication system includes a transmitter that modulates one or... | 01/28/2003 |
| 6415004 | Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device In the present invention, the amplitude subtracting type of phase detector of the timing recovery section outputs a difference γi of a synthesized amplitude deviation at 1/2 of a symbol time. The averaging section computes an average value of ... | 07/02/2002 |
| 6411658 | Demodulation device A demodulation device having a demodulating circuit that conducts the primary demodulation of received modulation wave, and a carrier recovery circuit that regenerates a carrier from demodulation signal by the demodulating circuit and conducts the seconda... | 06/25/2002 |
| 6175269 | Demodulation unit and method of demodulating a quadrature To demodulate a quadrature input signal (Si) (for example, frequency shift) a demodulation unit (DEM) is used, comprising a PLL (P) having a complex mixer (M) and a controlled oscillator (V). Normally, a limiter has to be used to keep the loop ... | 01/16/2001 |
| 6133802 | Synchronous carrier recovery circuit and injection locked oscillator A simple carrier recovery circuit capable of accurately detecting and synchronizing an incoming carrier frequency without the use of a phase locked loop (PLL) is provided. Instead of a PLL, the carrier recovery circuit includes an injection locked oscilla... | 10/17/2000 |
| 6018551 | Method and apparatus for reproducing carrier A complex multiplier 5 complex-multiplies base band signals x and y obtained from a receive signal by local oscillation signals c and s, to output complex detection signals p and q. A phase difference detecting portion 7 outputs the amount of the detected... | 01/25/2000 |
| 5963351 | Digital optical receiver with instantaneous Josephson clock recovery circuit A digital optical receiver and clock recovery circuit for use in detecting and retiming optical data transmitted at rates up to and exceeding 40 Gb/s. The receiver is made, in part, of superconducting Josephson junctions. The receiver includes an optical ... | 10/05/1999 |
| 5949823 | Data communication system and radio IC card system An arrangement to realize the functions of a radio card system in which power is transmitted to perform data communication. According to such arrangement, a delay line and a clock regenerating circuit such as PLL circuit which are previously necessary for... | 09/07/1999 |
| 5912929 | Method and apparatus for performing carrier detection A digital implementation for a carrier detector. The detector determines if the carrier frequency at any instant is within a predetermined frequency band. The detector further determines if the detected frequency remains within the predetermined frequency... | 06/15/1999 |
| 5903350 | Demodulator and method useful for multiplexed optical sensors An apparatus and method is presented to provide wide dynamic range measurements of the input phase to an interferometer using a phase generated carrier especially useful utilizing time multiplexing to demodulate a series of interferometers. A modulation d... | 05/11/1999 |
| 5841322 | Phase detector using carrier suppression and oscillator using the phase detector A phase detector responsive to a first signal having a carrier frequency and a second signal close to the carrier frequency, including a carrier suppression circuit which produces a carrier suppressed signal from the first and second signals, and a mixer ... | 11/24/1998 |
| 5832369 | Microwave receiver configured to provide non-referenced distance measurements along with signal magnitude measurements A receiver configured to measure phase change (Ɗ$c;) in a signal transmitted from a microwave signal source, such as a cell site for cellular telephones, the transmitted signal including a carrier signal (F1) added to a modulation signal (F... | 11/03/1998 |
| 5793250 | Phase demodulator selectively using a first or a second detector A demodulator for radio data communications is provided, which is capable of an optimum demodulation operation in response to the environmental condition under which communications are made independent of the preamble length. A phase angle calculator calc... | 08/11/1998 |
| 5757857 | High speed self-adjusting clock recovery circuit with frequency detection A clock recovery circuit based upon an early-late gate approach is applied to high speed serial communication links using NRZ data. The circuit has no systematic phase offset and therefore requires no external phase adjustment circuits or mechanisms. The ... | 05/26/1998 |
| 5751187 | Method and device for phase-modulated signals A device and a method correct deviation when transferring an information-carrying signal between a transmitter and a receiver. The transmitter can transmit with a plurality of frequencies generated by a voltage-controlled oscillator used for phase demodul... | 05/12/1998 |
| 5719527 | Method and apparatus for amplifying, modulating and demodulating A highly efficient linear amplifier and/or modulator and demodulator comprising first and second feedback loops is provided. Each loop processes a component of the input signal and the component signals are recombined at, for example, a summing junction 1... | 02/17/1998 |
| 5684836 | Receiver with automatic frequency control In a receiver, a frequency offset estimating circuit inputs a received signal and a decision value from a decision circuit, and estimates a frequency offset. A CIR estimating circuit inputs the estimated frequency offset, the received signal and the decis... | 11/04/1997 |
| 5656971 | Phase demodulator having reliable carrier phase synchronization In a demodulation device for demodulating a phase-modulated wave, a baseband signal producing circuit produces a baseband signal having particular information which is dependent on the phase-modulated wave. Responsive to the baseband signal, a phase infor... | 08/12/1997 |
| 5606581 | Method and apparatus for the cancellation of interference in electrical systems A cancellation circuit is provided where one demodulator circuit provides a demodulated output having interference voltage owing to interference between carrier signals, between a carrier signal and noise, or a combination of both. Cancellation of interfe... | 02/25/1997 |
| 5541965 | Carrier frequency synchronization device using two different B/W filters A carrier synchronization device determines and compensates for differences in synchronization between a local carrier and a received modulated signal to be demodulated by the local carder. The device includes an apparatus determining an error signal &3xb... | 07/30/1996 |
| 5521548 | Phase detector In a phase detector, an input signal (Si) is multiplied in a multiplier by two reference signals intersecting at right angles with each other. Signals obtained by multiplication are passed through filters and subjected to quadrature demodulation. An I sig... | 05/28/1996 |
| 5469112 | Communication device with zero-crossing demodulator A communication device (100) includes mixers (104) and (108) which mix a local oscillator (112, 106) with a received signal to produce in-phase (i) and quadrature (q) components. The direction of the phase of the signal is detected as it crosses the i and... | 11/21/1995 |
| 5406218 | Phase demodulator receiving inputs from phase detector and binary phase detector A demodulation circuit comprises: a phase detection circuit for determining an absolute value of a phase difference between an input signal to be demodulated and a reference signal; a binary phase detection circuit for converting a phase lead or lag betwe... | 04/11/1995 |
| 5398002 | Automatic frequency control system by quadrature-phase in frequency or phase demodulating system A method and apparatus for digitally demodulating a phase or frequency modulated signal using a quadrature mixing circuit to mix the phase or frequency modulated signal with a frequency equal to the carrier frequency of the received modulated signal to pr... | 03/14/1995 |
| 5367538 | Apparatus and method for direct phase digitizing This patent application discusses a direct phase digitizing apparatus (303) for use in a radiotelephone (101). The direct phase digitizing apparatus (303) accepts a first analog signal (309) having a phase, a voltage range and a first frequency. First, th... | 11/22/1994 |
| 5296820 | Coherent demodulator preceded by non-coherent demodulator and automatic frequency control circuit A non-coherent demodulator 1 multiplies a modulated intermediate frequency (IF) signal with a signal from a local oscillator 2 to produce a first pseudo baseband signal having frequency error. The first pseudo baseband signal is supplied to a wide band PL... | 03/22/1994 |
| 5260975 | Digital demodulator A digital demodulator wherein a phase difference is detected between a reference signal and an angle-modulated wave, the difference in frequency is detected between the angle-modulated carrier wave and the reference signal based on the phase difference, a... | 11/09/1993 |
| 5206601 | Order statistic signal processor for estimating values of signal parameters and demodulating amplitude-, phase-, and frequency-modulated signals The order statistic signal processor obtains continuing estimates of amplitude, phase, or frequency of an input signal based on order statistics. By way of definition, the P'th order statistic for a set of samples from a continuously distributed process i... | 04/27/1993 |
