Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7864888 | Transmission mode/guard length detection circuit and method therefor A transmission mode/guard length detection circuit that uses the Orthogonal Frequency Division Multiplexing method, in which: a difference between a reference wave having a constant period generated on the basis of a transmission mode length that is a time period le... | 01/04/2011 |
| 7860189 | Hybrid heterodyne transmitters and receivers Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to... | 12/28/2010 |
| 7856070 | Method and system for digital baseband receiver with digital RF/IF/VLIF support in GSM/GPRS/EDGE compliant handsets A method and system for digital baseband receiver with digital RF/IF/VLIF support in GSM/GPRS/EDGE compliant handsets. The method may comprise receiving an input signal which may be a digital RF signal, IF or VLIF signals, and the input signal may comprise of I and ... | 12/21/2010 |
| 7856072 | Semiconductor device, memory device and memory module having digital interface An object of the present invention is to reduce jitter dependent on data patterns by an interface receiver. Another object of the present invention is to provide an LSI capable of automatically adjusting a delay time for jitter reduction so as to be able to control ... | 12/21/2010 |
| 7856071 | Multi-path acquisition in the presence of very high data rate users A method of multi-path acquisition may include estimating a contribution of acquired users of a first type to a received signal, canceling the estimated contribution from the received signal to generate a resultant signal, and performing multi-path acquisition for u... | 12/21/2010 |
| 7848457 | Constant delay zero standby differential logic receiver and method A differential receiver circuit on an integrated circuit consumes substantially no standby power, has constant propagation delay regardless of the input common mode bias, has acceptable common mode rejection and includes first and second pass circuits and buffers to... | 12/07/2010 |
| 7848458 | Communication apparatus A communication apparatus associated with a system that uses two or more discontinuous frequency bands. The communication apparatus includes a BPF (band pass filter) including a plurality of BPFs associated with signals having respective frequency bands; a controlle... | 12/07/2010 |
| 7848459 | Radio receiving apparatus and radio receiving method A radio receiving apparatus wherein the interference can be minimized and the power and bands can be effectively used in the process of receiving a signal comprising a combination of an impulse signal and an OFDM signal. In this apparatus, a transmission path equali... | 12/07/2010 |
| 7839955 | System and method for the non-linear adjustment of compensation applied to a signal In one embodiment of the present invention, a method for adjusting a signal includes applying loss compensation for frequency-dependent distortion to a signal before or after the distortion occurs to generate an output signal. The method also includes, using a clock... | 11/23/2010 |
| 7835465 | ADC architecture for wireless applications A simplified architecture is disclosed for use in wireless receiver applications, particularly for ADC conversion of received in-phase I and quadrature Q signals. Circuit area is substantially reduced by sharing a single ADC to convert both signals, switching the AD... | 11/16/2010 |
| 7835462 | Correction circuit A comparator compares the voltage of an envelope signal by applying envelope detection to a signal amplitude-modulated by a digital signal encoded by a Manchester code with the terminal voltage of a capacitor constituting a filter for converting the output current o... | 11/16/2010 |
| 7835463 | Digital radio frequency memory A digital radio frequency memory (DFRM) which converts an incoming analog radio frequency signal to a fourteen bit digital signal allowing for digital signal processing and then retransmitted as an analog RF signal. The DFRM provides a time delay for RF signals by s... | 11/16/2010 |
| 7835464 | Digital signal receiver with Q-monitor A digital signal receiver for a high-bitrate digital signal has a serial signal input (20, 20′) and a number of N parallel digital signal outputs (26) with N>1. The receiver contains at least N+1 digital sampling channels (31-35), a Q-m... | 11/16/2010 |
| 7830985 | Analog front-end having built-in equalization and applications thereof An analog front-end having built-in equalization includes a control module and a tunable gain stage. The control module is operably coupled to provide a frequency response setting based on a channel response of a channel providing high-speed serial data to the analo... | 11/09/2010 |
| 7830984 | OFDM/OFDMA channel estimation Systems and methods which introduce a variable shift with respect to pilot symbols in providing a data subcarrier channel estimation are shown. Use of pilot symbol shifts may be useful, for example, when path delay is long and/or when non-consecutive, non-uniformly ... | 11/09/2010 |
| 7826562 | Digital interface receiver apparatus An audio controlling device generates an audio mute signal based on the level of a power-supply voltage supplied from the source equipment, whether a clock signal has been input or not, whether a digital signal has been input or not, whether a multiplier circuit is ... | 11/02/2010 |
| 7817749 | Digital signal receiver including wideband tunable antenna device A digital tuner unit receiving a digital signal in a reception channel having a predetermined bandwidth is connected at a subsequent stage of an antenna device containing radiation conductors and varactor diodes. A digital reception signal output from the digital tu... | 10/19/2010 |
| 7817748 | Pragmatic adaptive maximum ratio combining (MRC) and minimum mean square error (MMSE) multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) receiver algorithm An adaptive receiver algorithm is disclosed, for use in multiple-input-multiple-output orthogonal frequency division multiplexing systems. The adaptive receiver algorithm selectively chooses either the maximum ratio combining technique or the minimum mean square err... | 10/19/2010 |
| 7813450 | Method and circuit arrangement for reducing RFI interface In a method for reducing RFI interference in a DMT data transmission a compensation signal for the purpose of reducing an RFI interference signal superposed on a transmitted DMT reception signal is generated. Only carrier frequencies of the DMT reception signal in t... | 10/12/2010 |
| 7813449 | Remotely controlled antenna and method An antenna system for receiving radio waves and for operation in conjunction with a remote controller that transmits control data including gain state data. The antenna system includes an antenna that receives the radio waves and outputs a radio frequency signal and... | 10/12/2010 |
| 7813451 | Apparatus and method for frequency shifting of a wireless signal and systems using frequency shifting Systems, methods and apparatus for improving the coverage of a wireless network based on frequency shifting scheme. A wireless signal in a frequency band is shifted to another distinct band, and carried in the shifted band, using wired or wireless mediums to another... | 10/12/2010 |
| 7809085 | Data recovery system for source synchronous data channels A high-definition multimedia interface (HDMI) receiver recovers high speed encoded data which are transmitted differentially over data channels of a lossy cable, along with a clock. Inter symbol interference, high-frequency loss, skew between the clock and data chan... | 10/05/2010 |
| 7809086 | Apparatus and methods for demodulating a signal An apparatus for demodulating an analogue input signal comprises a hard limiter stage (4) for converting the signal to a two level signal. A digital down converter/low pass filter stage (6) converts the signal to a base band signal, and a symbol synchr... | 10/05/2010 |
| 7809083 | Differential receiver with frequency offset compensation A differential receiver which provides for estimation and tracking of frequency offset, together with compensation for the frequency offset. Estimation and tracking of the frequency offset is undertaken in the phase domain, which reduces computational complexity and... | 10/05/2010 |
| 7809084 | Signal receiving circuit and signal input detection circuit In a signal receiving circuit there are provided N input detection circuits 2a to 2n for receiving clock signals S1-c to SN-c included in N channels of signals S1 to SN. Each of the input detection circuits 2 | 10/05/2010 |
| 7804917 | Clear channel assessment method and system for ultra wideband OFDM An ultra-wideband clear channel assessment system uses a double-window energy technique for energy detection, which indicates a clear or busy channel. ... | 09/28/2010 |
| 7801248 | Interference suppression with virtual antennas A receiver suppresses co-channel interference (CCI) from other transmitters and intersymbol interference (ISI) due to channel distortion using “virtual” antennas. The virtual antennas may be formed by (1) oversampling a received signal for each actual antenna at... | 09/21/2010 |
| 7796706 | Digital broadcast service discovery correlation Aspects of the invention are directed to service and channel discovery in a digital broadcast network. A pilot synchronization symbol, which has known characteristics, is included as a first symbol of digital broadcast frames. The pilot symbol, which can be decoded ... | 09/14/2010 |
| 7792219 | Apparatus and method for correcting common phase error in a multi-carrier communication system An apparatus and method for correcting a CPE in a signal reception apparatus of a multi-carrier communication system are provided, in which an auto-correlation of a reference signal estimated from a reference symbol among a plurality of symbols is detected, a cross-... | 09/07/2010 |
| 7792216 | Timing estimator in OQPSK demodulator A timing estimator of an OQPSK demodulator is provided. In the timing estimator, an A/D converter converts an analog reception signal into a digital reception signal. A differential circuit section delays the digital reception signal from the A/D converter by a pres... | 09/07/2010 |
| 7792218 | Digital radio frequency memory A digital radio frequency memory (DFRM) which converts an incoming analog radio frequency signal to a fourteen bit digital signal allowing for digital signal processing and then retransmitted as an analog RF signal. The DFRM provides a time delay for RF signals by s... | 09/07/2010 |
| 7792217 | Method and system for channel estimation The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more synchronization and channel estimate symbols can be combined to compute a re... | 09/07/2010 |
| 7792215 | Direct-conversion receiver and sub-harmonic frequency mixer thereof Provided is a sub-harmonic frequency mixer having a structure in which two terminals of transistors receiving a Radio Frequency (RF) signal and a Local Oscillation (LO) signal are coupled. The frequency mixer is composed of a single-level structure of transistors an... | 09/07/2010 |
| 7787568 | High bit rate RFID system Methods, systems, and apparatuses for quadrature amplitude modulation (QAM) based radio frequency identification (RFID) systems are described. In an aspect, a tag transmitter performs QAM signal mapping and quadrature modulation of a carrier wave (CW), to transmit a... | 08/31/2010 |
| 7787569 | Radio frequency integrated circuit having frequency dependent noise mitigation with spectrum spreading A radio frequency integrated circuit (RFIC) includes a low noise amplifier that amplifies an inbound radio frequency (RF) signal to produce an amplified RF signal. A down conversion module converts the amplified RF signal to a down converted signal based on a local ... | 08/31/2010 |
| 7782981 | Signal processing apparatus and method A signal processing apparatus (200) comprises a plurality of receive antennas (216a-m) arranged to receive a composite signal containing a plurality of transmitted symbols. A joint detector-decoder (218) iteratively enumerates most... | 08/24/2010 |
| 7778357 | COFDM demodulator A COFDM demodulator including a fast Fourier transform circuit receiving a signal on an information channel, the received signal corresponding to a sequence of symbols, each conveying several carriers, some of which are pilots, each carrier of a symbol being modulat... | 08/17/2010 |
| 7769106 | Reconfigurable pulse detector in wireless communications system In a receiver architecture, for example for use in receiving pulses in an Ultra Wideband system, a received signal is applied to a mixer, together with pulses which correspond to expected received pulses. The mixer output is applied to a block, which can be configur... | 08/03/2010 |
| 7769107 | Semi-blind analog beamforming for multiple-antenna systems Complex antennas weights for use in beamforming in a multiple-antenna system are determined based upon clear channel assessment (CCA) information in a wireless networking environment. ... | 08/03/2010 |
| 7769109 | Method and apparatus to perform modulation using integer timing relationships between intra symbol modulation components A method and apparatus to improve modulation efficiency for chip to chip interconnects. Modulation objects that are integer multiples of a fundamental time unit (FTU) are used to populate a symbol period that is also an integer multiple of the FTU. A possible symbol... | 08/03/2010 |
