| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 333028000 | Equalizers | 32 |
| 20080238587 | PACKAGE EMBEDDED EQUALIZER - A passive equalizer circuit is embedded within a substrate of a package containing an integrated circuit. It is believed that substantial reduction in uneven frequency dependent loss may be achieved for interconnects interconnecting the integrated circuit with other integrated circuits on a printed circuit board. Other aspects are described and claimed. | 10-02-2008 |
| 20080238588 | Programmable passive equalizer - Embodiments of a programmable passive equalizer are described herein. | 10-02-2008 |
| 20090206962 | INTEGRATED 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 on a printed circuit board and on-chip components that are fabricated on a common integrated circuit die as a receiver chip. The on-chip components include one or more variable resistors for adjusting a degree of equalization. The off-chip components include one or more resistors for fine tuning input impedance matching of the integrated receiver circuit. | 08-20-2009 |
| 20090219117 | PLUG-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 processed in the equipment while allowing desired peaking at high frequencies of the same signals to compensate for high-frequency roll-off. | 09-03-2009 |
| 20090278633 | EQUALIZER 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 second resistor. A connector including the equalizer and a printed circuit board including the connector are also provided. | 11-12-2009 |
| 20090295514 | Passive 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 series to the first resistor at a node to thereby form a resistor series, and a capacitor connected in parallel to the resistor series. The cascade RL circuit is connected between the RC loops and includes a fifth resistor, a sixth resistor and an inductor connected between the fifth resistor and the sixth resistor. The cross-coupled inverter unit is connected in parallel to the RL circuit and connected between the RC loops for using the feature of negative impedance to obtain an excellent high-frequency gain. | 12-03-2009 |
| 20100013579 | Boosted cable for carrying high speed channels and methods for calibrating the same - A self calibrating cable, including a USB3 cable, with a boost device of the embodiment of the invention is described, in which parameters that control the response of the boost device are set optimally in a self-calibrating process comprising looping the boosted cable on itself through a calibration fixture that contains a calibration control device. The boost device includes pattern generators and a sampling circuit. Each high speed channel of the cable is separately tested and calibrated with the help of one of the other channels serving as a sampling channel. Additional embodiments provide for a selected replica boost device and a distinct pattern generator device in the calibration fixture. A corresponding system and method for calibrating a cable are also provided. | 01-21-2010 |
| 20110001588 | WAVEFORM EQUALIZATION CIRCUIT WITH PULSE WIDTH MODULATION - There is provided a waveform equalization circuit with pulse width modulation that includes pulse-width adjust-level generation circuits PWCLC | 01-06-2011 |
| 20110080237 | AUTOMATIC DE-EMPHASIS SETTING FOR DRIVING CAPACITIVE BACKPLANE - In described embodiments, automatic de-emphasis setting is provided for driving a capacitive backplane. Line impedance and line length of a transmission (TX) device are measured that form a load impedance of a driver. For some exemplary embodiments, the line impedance is predominantly a line capacitance, and such embodiments detect this capacitance. Measured line impedance is converted to a control signal (such as, for example, a three bit digital control signal) which automatically sets the de-emphasis of the TX stage. With the amount of capacitance and the length of the transmission line, the appropriate de-emphasis settings might be determined, and such de-emphasis setting be applied by the transmitter to the driver to compensate for transmission line effects. | 04-07-2011 |
| 20110163828 | INTEGRATED 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 on a printed circuit board and on-chip components that are fabricated on a common integrated circuit die as a receiver chip. The on-chip components include one or more variable resistors for adjusting a degree of equalization. The off-chip components include one or more resistors for fine tuning input impedance matching of the integrated receiver circuit. | 07-07-2011 |
| 20110227675 | High Bandwidth Programmable Transmission Line Equalizer - A transmission line equalizer includes multiple signal paths connected in parallel between an equalizer input signal and an output amplifier where each signal path has a network implementing a specific frequency dependent response and each signal path implements current gain amplification with one or more of the signal paths having a variable gain programmed through a time invariant, DC programming signal. Furthermore, one or more of the signal paths implements linear-to-nonlinear signal transformations and compensating nonlinear-to-linear signal transformations to generate linearized output signals at the one or more signal paths. The equalizer further includes the output amplifier summing output signals from the multiple signal paths to generate an equalized output signal. In operation, the gain of the one or more signal paths is varied to establish the relative proportions of the output signals generated by each signal path and summed at the output amplifier. | 09-22-2011 |
| 20110234339 | Waveguide distortion mitigation devices with reduced group delay ripple - Disclosed are waveguide distortion mitigation devices that produce reduced group delay ripple in communication systems in which they are used. The devices comprise a first and second tapered waveguide sections, a first coupling device coupled to the first tapered waveguide section, and a second coupling device coupled to the second tapered waveguide section and the first waveguide coupling device. A waveguide isolator may optionally be coupled between the first and second waveguide coupling devices. The first and second coupling devices may comprise waveguide circulators or waveguide-hybrid couplers. The tapered waveguide sections may embody a single transition comprising a single waveguide wall, a single transition comprising two waveguide walls, or a plurality of transitions comprising a plurality of waveguide walls. | 09-29-2011 |
| 20110241807 | CONTROL APPARATUS AND METHOD, AND SIGNAL PROCESSING APPARATUS - A control apparatus controls a signal processing unit. The signal processing unit is mounted within a case and includes a waveform shaping unit which performs a waveform shaping process on an inputted signal. The control apparatus includes: an obtaining device which obtains (i) mounting information indicating a mounting state of the signal processing unit, (ii) temperature information indicating a temperature of the signal processing unit, and (iii) processing unit characteristic information indicating characteristics unique to the signal processing unit; and an adjusting device which adjusts waveform shaping characteristics of the waveform shaping unit, on the basis of the mounting information, the temperature information and the processing unit characteristic information. | 10-06-2011 |
| 20110285480 | EQUALIZER WITH A VARIABLE TRANSFER CURVE - Microwave signal equalizer comprising a signal transmission line, a first open stub and a second open stub which are applied in parallel to the said transmission line by a respective connection circuit, said first open stub and second open stub being controlled by at least one second dc control voltage which is applied to the respective connection circuit, said second control voltage being variable and said connection circuit being able to produce a variable resistance upon variation of said second control voltage. | 11-24-2011 |
| 20110291774 | EQUALIZER AND METHOD OF EQUALIZING SIGNALS - An equalizer includes an oversampling logic unit, a direct current setting unit, and an alternating current setting unit. The oversampling logic unit oversamples data from a channel to generate a plurality of direct current terms and a plurality of alternating current terms according to an oversampling clock, and outputting a plurality of direct current terms corresponding to an output clock and a plurality of alternating current terms corresponding to the output clock according to the output clock. The direct current setting unit adjusts a direct current setting of the equalizer according to a plurality of direct current terms inputted by the oversampling logic unit within a first predetermined time. And the alternating current setting unit adjusts an alternating current setting of the equalizer according to a plurality of alternating current terms inputted by the oversampling logic unit within the first predetermined time. | 12-01-2011 |
| 20120081198 | Waveform Shaping Device, Equalizer, Receiving System, Method Of Controlling Waveform Shaping Device, Control Program, And Computer-Readable Medium In Which Control Program Is Recorded - A waveform shaping device shapes a waveform of an externally input signal and outputs the input signal with the shaped waveform as an output signal to an equalizer for compensating a distortion of a signal, and includes a nonlinear process section for generating a nonlinear process signal (i) in which positive and negative signs of a low-frequency-free signal obtained by removing at least a direct current component from frequency components of the externally input signal are retained and (ii) which broadly monotonically increases nonlinearly with respect to the low-frequency-free signal when values of the low-frequency-free signal are at least in the vicinity of 0, the nonlinear process signal being added to the low-frequency-free signal so as to generate the input signal. | 04-05-2012 |
| 20120133459 | PASSIVE FILTER AND AC COUPLER RECEIVER INTERFACE - An apparatus includes a capacitor coupled between a first node responsive to receive an input signal and a second node. The apparatus includes a first circuit coupled to the second node and a third node. The first circuit is selectively operable to separately configure at least one of a low-frequency gain of an equalizer and a pole of the equalizer. The equalizer includes the first circuit and the capacitor. The second node is responsive to receive an equalized version of an AC signal of the input signal in a first mode of the apparatus. The second node is responsive to receive a non-equalized version of the AC signal of the input signal in a second mode of the apparatus. The equalized version of the AC signal of the input signal may be a level-shifted and equalized version of the AC signal in the first mode of the apparatus. | 05-31-2012 |
| 20120139669 | INTEGRATED 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 on a printed circuit board and on-chip components that are fabricated on a common integrated circuit die as a receiver chip. The on-chip components include one or more variable resistors for adjusting a degree of equalization. The off-chip components include one or more resistors for fine tuning input impedance matching of the integrated receiver circuit. | 06-07-2012 |
| 20120188031 | Programmable high-frequency high-gain equalizer for digital display interfaces - There is provided a programmable high-frequency high-gain equalizer for digital display interfaces comprising, two pairs of current sources; two pairs of transistors arranged as two differential pairs, each transistor connected to a different one of the current sources; and a pair of a negative impedance resistors connected to the two pairs of two differential pairs; and a pair of capacitive and programmable resistive degeneration connected to the two pairs of two differential pairs to optimize the equalizer gain. | 07-26-2012 |
| 20120194304 | Equalizer Circuit and Printed Circuit Board - An equalizer circuit includes a passive equalizer having an inductor connected in parallel to a signal interconnection line, the inductor being made up of a conductor portion formed on a side face of a through-hole of a circuit board. | 08-02-2012 |
| 20120200375 | LINEAR EQUALIZER WITH PASSIVE NETWORK AND EMBEDDED LEVEL SHIFTER - The disclosed embodiments relate to the design of a linear equalizer that supports low-power, high-speed data transfers. In some embodiments, this linear equalizer contains a passive network that provides selective frequency peaking in a frequency range associated with a falling edge of a frequency response of the channel. It also includes a level shifter coupled between the channel and the passive network, wherein the level shifter is an active component that provides amplification and/or level-shifting. Moreover, the linear equalizer is designed so that power from the level shifter facilitates the selective frequency peaking of the passive network. | 08-09-2012 |
| 20130002378 | DIGITAL ELECTRONIC DEVICE - This invention provides a digital electronic device comprising: a grounded metal portion comprising a first metal plate electrically connected to ground and a first substrate disposed on the first metal plate; at least one layer of differential-mode reference metal portion comprising a second substrate and a second metal plate electrically connected to the first metal plate by at least one conductive structure; a pair of differential signal lines at least partially disposed on the second substrate of the at least one layer of differential-mode reference metal portion and electromagnetically coupled to the second metal plate of the at least one layer of differential-mode reference metal portion; and an equalizer electrically connected to the pair of differential signal lines. | 01-03-2013 |
| 20130038413 | TRANSMISSION LINE AND ELECTRICAL APPARATUS USING THE SAME - A transmission line with a structure which is capable of forming a passive equalizer and an electrical apparatus using the same are illustrated. The transmission line has a substrate, a ground plane, a defect ground structure, a pair of transmission conducting lines, and at least one stub. The substrate has a plurality of surfaces. The ground plane is located on at least one of the surfaces. The defect ground structure is formed on the ground plane. The pair of transmission conducting lines is located on one of the surfaces, and stretching over the defect ground structure. The at least one stub is located above a plane of the defect ground structure, extending along with at least one side of two sides of the pair of the transmission conducting lines, and electrically coupled to the pair of the transmission conducting lines and the ground plane. | 02-14-2013 |
| 20130099879 | DIFFERENTIAL EQUALIZER AND SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT THEREOF - Differential equalizers and systems, methods, and computer products thereof configured and operative to dynamically compensate for signal losses over a wide frequency range by maintaining a relatively constant or consistent differential potential over the frequency range are disclosed. Received signals can be dynamically scaled down based on their frequency content such that all of the signals are outputted at or around a relatively constant amplitude. | 04-25-2013 |
| 20130222082 | EQUALIZER FOR MULTI-LEVEL EQUALIZATION - An equalizer includes a first delay module, a second delay module, a first amplitude module, a second amplitude module, and a combining unit. The first delay module receives a first signal and delays the first received signal for a preset period, and the first amplitude module transfers the first delayed signal to transmit a first weighted signal with a first peak amplitude. Similarly, the second delay module receives the first delayed signal and delays the second received signal for the preset period, and the second amplitude module transfers the second delayed signal to transmit a second weighted signal with a second peak amplitude. The combining unit combines an input signal and the first and the second weighted signals together to generate an equalized signal. | 08-29-2013 |
| 20130307646 | Adaptive Equalization of Impedance Mismatched Card-Edge Connections - A method includes tapping power from a broadband RF input, filtering the tapped power with a plurality of band pass filters, measuring the power filtered by each of the plurality of band pass filters and controlling an adaptive equalizer circuit to flatten excessive non-linear frequency response from the broadband RF input as a function of measured power filtered at each of the plurality of band pass filters. An apparatus, includes a broadband RF input, a plurality of band pass filters coupled to the broadband RF input, at least one power measurement circuit coupled to the plurality of band pass filters and an adaptive equalizer circuit coupled to the at least one power power measurement circuit and the plurality of band pass filters, wherein the at least one power measurement circuit provides control signals to the adaptive equalizer circuit as a function of measured power at each of the plurality of band pass files and wherein the adaptive equalizer circuit flattens excessive non-linear frequency response of the broadband RF input. | 11-21-2013 |
| 20130342290 | EQUALIZER FOR LOSS-COMPENSATION OF HIGH-FREQUENCY SIGNALS GENERATED IN TRANSMISSION CHANNELS - An equalizer for compensating transmission losses of electronic communication signals includes a circuit board and a compensation module. The compensation module includes a pair of input pins, a pair of output pins, first and second resistors, first and second vias, and a pair of micro-strips. When a signal transmitted by the circuit board is received by the input pins, a first part of the signal is directly outputted from the output pins, a second part of the signal is reflected by the first resistor and transmitted back to the output pins to be outputted, and a third part of the signal is reflected by the second resistor and transmitted back to the output pins to be outputted, such that the output of the equalizer applies two stages of compensation. | 12-26-2013 |
| 20140062622 | LOW-FREQUENCY EQUALIZER CIRCUIT FOR A HIGH-SPEED BROADBAND SIGNAL - A method of compensating for loss of a high-speed broadband signal may include receiving a high-speed broadband signal. The method may also include at least partially compensating for a low-frequency loss associated with a low-frequency component of the high-speed broadband signal. The compensation for the low-frequency loss may be based on a transfer function that may include a pole with a pole-frequency associated with the low-frequency component of the high-speed broadband signal. | 03-06-2014 |
| 20140125435 | EQUALIZER ASSEMBLY FOR LOSS-COMPENSATION OF HIGH-FREQUENCY SIGNALS GENERATED IN TRANSMISSION CHANNELS - An equalizer assembly for compensating transmission losses of electronic communication signals includes a circuit board and a first equalizer and a second equalizer. Two input pins of each equalizer are parallel to each other. The input pins of the first equalizer are perpendicular to the input pins of the second equalizer. | 05-08-2014 |
| 20140167887 | EQUALIZER FOR LOSS-COMPENSATION OF HIGH-FREQUENCY SIGNALS GENERATED IN TRANSMISSION CHANNELS - An equalizer includes a circuit board and a compensation module. The compensation module includes first and second transmission lines, first to fourth resistors, and first to fourth micro-strips. Four vias extend through the circuit board and are grounded. First terminals of the four resistors are grounded through the vias. A second terminal of a first resistor is connected to a second terminal of the second resistor through the first micro-strip, and is connected to the first transmission line through the second micro-strip. A second terminal of the third resistor is connected to the second transmission line through the third micro-strip, and is connected to a second terminal of the fourth resistor through the fourth micro-strip. A length of the first micro-strip is equal to a length of the fourth micro-strip. A length of the second micro-strip is equal to a length of the third micro-strip. | 06-19-2014 |
| 20140167888 | EQUALIZER FOR LOSS-COMPENSATION OF HIGH-FREQUENCY SIGNALS GENERATED IN TRANSMISSION CHANNELS - An equalizer includes a circuit board and a compensation module. The compensation module includes first and second transmission lines, first to fourth resistors, and first to fourth micro-strips. Two vias extend through the circuit board and are grounded. First terminals of the first and second resistors are electrically connected to the ground layer through the first via. First terminals of the third and fourth resistors are electrically connected to the ground layer through the second via. A second terminal of the first resistor is electrically connected to the first transmission line through the first micro-strip, and is further electrically connected to a second terminal of the second resistor through the second micro-strip. A second terminal of the third resistor is electrically connected to the second transmission line through the third micro-strip, and is further electrically connected to a second terminal of the fourth resistor through the fourth micro-strip. | 06-19-2014 |
| 20150365260 | VARIABLE ISI TRANSMISSION CHANNEL APPARATUS - A variable ISI transmission channel apparatus inserted in a high-speed transmission channel for the high-speed serial data communication simulates a “live” ISI environment to which the high-speed transmission channel in operation is exposed, in a situation such as a bit error test by means of continuously adjusting an amount of inter-symbol interference (ISI) in the high-speed transmission channel. | 12-17-2015 |
