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Class 333/28R - Equalizers


Subclass of Class 333 - Wave transmission lines and networks
Definition: Networks with attenuation or attenuation and phase distortion
No. of patents: 372
Last issue date: 02/14/2012


1                    
NumberTitleIssue Date
8115566Integrated front-end passive equalizer and method thereof
A passive equalizer circuit incorporated at a front-end of an integrated receiver circuit uses passive components that are distributed between inside and outside of an integrated circuit package. The passive equalizer circuit has off-chip components that are placed ...
02/14/2012
7924113Integrated front-end passive equalizer and method thereof
A passive equalizer circuit incorporated at a front-end of an integrated receiver circuit uses passive components that are distributed between inside and outside of an integrated circuit package. The passive equalizer circuit has off-chip components that are placed ...
04/12/2011
7808340Plug-in device for signal correction
Described herein are systems and methods for a JXP-type plug-in device that may be inserted within existing transmission equipment, such as RF amplifiers and the like, to provide an appropriate amount of flat attenuation to the lower frequencies of signals being pro...
10/05/2010
7791429Equalizer and connector including the same
An equalizer includes a first resistor and a capacitor connected in parallel. The positive terminal of the capacitor is connected to a signal transmission line on a blah printed circuit board. The negative terminal of the capacitor is connected to ground through a s...
09/07/2010
7737802Passive equalizer with negative impedance to increase a gain
A passive equalizer with negative impedance to increase a gain includes a first RC loop, a second RC loop, a cascade RL circuit and a cross-coupled inverter unit. Each of the first and the second RC loops includes a first resistor, a second resistor connected in ser...
06/15/2010
7714677Signal adjuster
A signal adjuster is disclosed to include a first connector and a second connector respectively connected to a signal source and a video display device, a buffer for buffering a high frequency signal, a signal bandwidth detector connected to the buffer for detecting...
05/11/2010
7696838Equalizing filter circuit
In an equalizing filter circuit having an input terminal 101, an output terminal 102, delay devices 104 connected in multi-stage to the input terminal 101, and a plurality of weighting circuits 105 which are branched from and conne...
04/13/2010
7696839Signal waveform equalizer circuit and receiver circuit
A signal waveform equalizer circuit capable of equalizing the waveform of an input signal with a center voltage of 0 V and yet small in circuit scale. An input signal (in FIG. 1, positive-phase input signal) whose waveform is to be equalized is input to the s...
04/13/2010
7671694Programmable passive equalizer
Embodiments of a programmable passive equalizer are described herein. ...
03/02/2010
7656248Equalizer and related signal equalizing method
An equalizer is disclosed. The equalizer includes a filter, configured to receive the first transmission signal, to perform a filtering operation on the first transmission signal according to a feedback signal to generate an output signal; a first slicer, configured...
02/02/2010
7633354Multistage tuning-tolerant equalizer filter with improved detection mechanisms for lower and higher frequency gain loops
The present invention provides an equalizer filter for compensating a received distorted signal for frequency dependent signal modifications introduced by a transmission channel, the received signal having an amplitude. The filter comprises at least one amplifying c...
12/15/2009
7504906Method for manufacturing an equalizer
A method for manufacturing an equalizer. The method first acquires a transmission line scattering-parameter, and a gain of the transmission line scattering-parameter at a frequency 1 π ...
03/17/2009
7394331Programmable passive equalizer
Embodiments of a programmable passive equalizer are described herein. ...
07/01/2008
7388959Harmonic generator and pre-amp
A Harmonic Generator for audio applications and a Pre-Amplifier circuit are combined to form a Harmonic Generator and Pre-Amplifier circuit. The Harmonic Generator is formed from a Buffer Circuit responsive to an input program signal for buffering the input program ...
06/17/2008
7382826Method and apparatus for the control of a decision feedback equalizer
Input data segments of received symbols are continuously stored in a decision feedback equalizer buffer at a symbol rate S. Output data sections of received symbols are supplied from the decision feedback equalizer buffer at an output rate of nS such that void times...
06/03/2008
7365532Apparatus to receive signals from electromagnetic coupler
In at least one embodiment an apparatus is provided that includes an electromagnetic coupler probe to provide sampled electromagnetic signals and an electronics component to receive the sampled electromagnetic signals from the electromagnetic coupler probe and to pr...
04/29/2008
7351917Vents with signal image for signal return path
A method, structure, and method of design relating an electrical structure that includes a metal voltage plane laminated to a dielectric substrate. A determination is made as to where to place an opening for venting gases generated during fabrication of the dielectr...
04/01/2008
7327204Analog delay chain having more uniformly distributed capacitive loads and analog delay cell for use in chain
A tapped delay chain comprises a plurality of delay cells where each cell has at least two output taps: a primary one for feeding forward a delayed signal to a next cell in the chain, and a secondary output tap for feeding a slightly-differently delayed signal to a ...
02/05/2008
7324167High-quality twisted-pair transmission line system for high-resolution video
A system comprising a first filter having an input and an output adapted to compensate for the characteristics of a first length of twisted-pair wire is disclosed. A first bypass path has an input and an output for bypassing the first filter. A second filter has an ...
01/29/2008
7324608Efficient subcarrier weighting to enhance receiver performance
A modem system for receiving and transmitting signals having a frequency domain equalizer (FEQ) block being responsive to a frequency channel response for processing the same to generate one or more equalizer coefficients, the modem system is responsive to an input ...
01/29/2008
7312833Channel equalizing apparatus and method for digital television receiver
Disclosed is a channel equalizing apparatus and method for a digital television receiver that performs channel equalization using equalizing algorithms. The channel equalizing apparatus includes a channel equalizing section for compensating for channel distortion us...
12/25/2007
7301418Differential transmission line having curved differential conductors and ground plane slots
A differential transmission line includes: a substrate; a ground conductor layer; and a first and a second signal conductor disposed in parallel to each other on the substrate. The first signal conductor and the ground conductor layer compose a first transmission li...
11/27/2007
7291034Cable connector assembly with internal printed circuit board
A cable connector assembly (1000) includes a housing defining a mating direction, and defining a mating interface (11) and a receiving space, a printed circuit board (3) received in the receiving space, and having a plurality of electrical pads ...
11/06/2007
7289007Temperature compensated variable tilt equalizer
A temperature compensated variable tilt equalizer configured to operate over a defined frequency range. The equalizer includes an RF input, an automatic temperature compensation circuit and a manual alignment circuit. The RF input receives an RF signal having a wide...
10/30/2007
7283586Adaptive equalizer matched filter error metric concept and apparatus
A correlative error detection system (60) for a signal equalizer (10) that corrects a distorted communications signal. The detection system (60) correlates a sequence of bits in a signal from an FFE and/or a DFE processor (12, 14) with a ...
10/16/2007
7276986Method and apparatus for improving signal integrity in a high speed flex cable
A method for decreasing high-frequency attenuation effects in a flexible cable includes communicatively coupling signal-enhancing circuitry to a signal layer of the flexible cable. ...
10/02/2007
7274736Multiple path equalization for multicarrier systems
A dual path equalization structure is used to equalize DMT systems operating over channels in which different impairments dominate the performance of different parts of the channel. Two TEQ/DFT structures are used to process the received signal, each optimized for a...
09/25/2007
7269215Equalization processing method and the apparatus for periodic fluctuation of transmission line characteristic
A method used in equalization processing is provided, in which a reference signal is received and a change point of transmission line characteristics is detected. A basic frequency signal of fluctuation period of the transmission line characteristics is extracted, a...
09/11/2007
7266355Low complexity equalizer for radio receiver
A diversity receiver (60) has two diverse channels fed by the antennas, an adaptive equalizer (20,30) for each channel and a coefficient adapter (40) for adapting two sets of coefficients in a time shared manner for the equalizers. A combiner co...
09/04/2007
7261582Cable connector assembly with internal printed circuit board
A cable connector assembly (100) includes a front housing piece (1), a printed circuit board (3) electrically connected with a number of cables (4) and assembled to the front housing piece (1), a rear housing piece (2) enclo...
08/28/2007
7262677Frequency filtering circuit for wireless communication devices
Systems and methods are disclosed for a frequency filtering circuit for wireless communications that includes a first resonator circuit comprising a first transmission line and a first capacitor coupled to the first transmission line and a second resonator circuit i...
08/28/2007
7260162Method and apparatus for selecting an equalization algorithm depending on the used coding algorithm or on the channel quality
A method and apparatus for improving the quality of a signal which has been detrimentally affected by inter-symbol interference due to time dispersion. The invention includes selecting one of at least two algorithms of equalization and after the selection, and proce...
08/21/2007
7247932Chip package with capacitor
A chip package for semiconductor chips is provided by the method of forming a chip package includes the steps of forming a printed circuit board with a window therethrough; forming semiconductor chip connections of one or more primary chips which overlie the window ...
07/24/2007
7245192Coupler with edge and broadside coupled sections
Couplers are disclosed that include first and second mutually coupled conductors. The coupled conductors may be regular or irregular in configuration, and for example, may be linear, including rectilinear or with one or more curves, bends or turns, such as forming a...
07/17/2007
7239665Selection of pre-computed equalizer based on channel characteristic
In some embodiments, a method includes determining a characteristic of a communication channel and selecting, on the basis of the determined characteristic, a pre-computed equalizer characteristic for application to signals received via the communication channel.
07/03/2007
7230490Voltage to current converter and method for converting
A voltage to current converter comprises a signal stage (1) with a first transistor (11) and a first resistor (12). The first transistor (11) is adapted to be fed with an input signal voltage (Vin). The converter is adapted to ...
06/12/2007
7218855System and method for communicating optical signals to multiple subscribers having various bandwidth demands connected to the same optical waveguide
The present invention is generally drawn to optical network architecture that can include a multi-subscriber optical interface that can service a plurality of subscribers that are located in close proximity relative to one another. For example, the multi-subscriber ...
05/15/2007
7215219Temperature and frequency variable gain attenuator
A temperature and frequency variable gain attenuator comprises a temperature variable attenuator and a temperature variable filter network whose resistances changed to c generate different responses that vary over temperature and frequency. At least three different ...
05/08/2007
7206366System and method for programmably adjusting gain and frequency response in a 10-GigaBit ethernet/fibre channel system
Aspects of the invention may provide a method and system for adjusting a gain and/or a frequency response of an input signal for a multimode PHY device. A signal divider may apportion the input signal into a gain adjustment signal and/or an equalization adjustment s...
04/17/2007
7205646Electronic device and chip package
The package includes a substrate, a first chip, a second chip, multiple first bumps and multiple second bumps. The substrate has a first region and a second region. The first region is substantially coplanar with the second region. The first bumps connect the first ...
04/17/2007
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