Quotables
"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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 |
| 8111761 | Method and apparatus for transmitting data and power across a transformer Encoding of a dual mode digital signal for transfer using a dual mode super source follower circuit to drive the signal across a pulse transformer is presented. The dual mode signal includes data in one mode and power/control in the other mode. In the power/control ... | 02/07/2012 |
| 8059725 | Induction neutralizing transformer An induction neutralizing transformer is provided. The induction neutralizing transformer includes a core and a coil wrapped around the core. The coil has a length between approximately 100 feet and approximately 200 feet and includes a plurality of twisted wire pai... | 11/15/2011 |
| 8023572 | Communication interface employing a differential circuit and method of use A communication interface employing a differential circuit and method of use is disclosed. In one form, a circuit operable to communicate signals via a communication bus can include a differential signaling circuit operable to be coupled to a communication bus. The ... | 09/20/2011 |
| 7961794 | Transfer of digital data through a transformer A method and a system for transferring a digital signal through a transformer, including a circuit for coding the digital signal to be transferred, having two outputs connected to the respective ends of a primary winding of the transformer, and a circuit for decodin... | 06/14/2011 |
| 7949056 | Balanced transmitting apparatus A balanced transmission signal Tx (t) (voltage e, −e) is applied to a transmission line (L1, L2), a suppression signal (ec) is generated from a common mode suppression signal source (ec), and the suppression signal (ec | 05/24/2011 |
| 7936830 | Active rectifier with load impedance switching Active rectification with load impedance switching for communication across a pulse transformer is presented. Load impedance switching is used for communicating data from the secondary side of the transformer to the primary side during data frames. During power fram... | 05/03/2011 |
| 7839938 | Method and apparatus for cancellation of magnetizing inductance current in a transformer circuit A feedback method and apparatus for cancellation of magnetizing inductance current are presented. A voltage driver applies a voltage signal to a primary of a transformer. Feedback apparatus detect changes in the voltage driver output current that are attributable to... | 11/23/2010 |
| 7817727 | Hybrid output driver for high-speed communications interfaces A driver circuit that consumes less current than other driver circuits combines a current-mode driver circuit with a voltage-mode driver circuit to provide impedance matching and signal equalization operations. In at least one embodiment of the invention, an apparat... | 10/19/2010 |
| 7804904 | Active replica transformer hybrid A communication circuit includes a near end transmitter, a hybrid having an input in communication with an output of the near end transmitter, and a near end adjustable load replication transmitter having an adjustable load. The communication circuit further include... | 09/28/2010 |
| 7792197 | Method for transmitting data and data transmitter A method is disclosed herein for transmitting data via a transmission path with at least two inductive transformers which respectively have a primary winding with a time constant and a secondary winding. The method comprises actuating the primary winding in order to... | 09/07/2010 |
| 7738568 | Multiplexed RF isolator A system for providing multiple communication channels over a single voltage isolation link includes first circuitry for multiplexing a plurality of digital data inputs from a plurality of communication channels onto the single voltage isolation link. Second circuit... | 06/15/2010 |
| 7738567 | Baseline wander correction for communication receivers A novel and useful baseline wander correction mechanism for use with transformer coupled baseband communication receivers. Parametric estimation of the transformer model is used estimate and cancel the baseline wander effect. A parametric model is used to model the ... | 06/15/2010 |
| 7733965 | Encoding method and apparatus for a dual mode super source follower circuit Encoding of a dual mode digital signal for transfer using a dual mode super source follower circuit to drive the signal across a pulse transformer is presented. The dual mode signal comprises data in one mode and power/control in the other mode. In the power/control... | 06/08/2010 |
| 7729429 | Active replica transformer hybrid A communication circuit comprises a near end transmitter, and adjustable near end replication transmitter and a near end receiver. The near end transmitter is configured to generate a transmission signal and comprises a first plurality of current sources. Outputs of... | 06/01/2010 |
| 7724831 | Method and apparatus for detection of load impedance modulation in a transformer circuit A method and apparatus for detection of load impedance modulation as a result of communication of data from the secondary to the primary side of a transformer are presented. The load impedance on the secondary of the transformer barrier is modulated differentially u... | 05/25/2010 |
| 7684499 | Multi-band line interface circuit with line side cancellation A line interface circuit with line side cancellation of a communication device is described herein. In one embodiment, a communication device includes a line interface circuit for interfacing a communication line. The line interface circuit includes a driver for dri... | 03/23/2010 |
| 7675978 | Transformer data coupler with high common mode immunity A data coupler includes a transformer having primary and secondary windings, a data transmitter coupled to the primary winding of the transformer, and a data receiver coupled to the secondary winding. The data transmitter includes a first driver and a second driver ... | 03/09/2010 |
| 7577205 | Return-loss compliant DSL modem line interface unit with complex termination A DSL line interface includes an impedance synthesizer that provides negative feedback to the differential amplifier in the DSL line interface so that the return loss standards for the return signal are met. The DSL line interface unit comprises a differential line ... | 08/18/2009 |
| 7526034 | Method and apparatus for communicating between devices having no common electrical ground Various methods, apparatuses, and systems are described in which devices having no common electrical ground communicate. In at least certain embodiments, an apparatus includes a transformer block to communicate a plurality of data signals and a synchronous clock sig... | 04/28/2009 |
| 7492827 | Method for data transmission via a data transmission path with inductive transformers, and a data transmission apparatus A method and an apparatus for data transmission via a transmission path having at least two inductive transformers, which each have a primary winding with a time constant and have a secondary winding. The method includes driving the primary windings to transmit an i... | 02/17/2009 |
| 7460604 | RF isolator for isolating voltage sensing and gate drivers A circuit package for providing isolation between a controller on a first side of a switched power supply and a second side of the switched power supply. An isolation link provides voltage isolation between the first and second sides and includes on the first sides ... | 12/02/2008 |
| 7433412 | Digital subscriber line induction neutralizing transformer network A digital subscriber line (DSL) circuit is disclosed and includes at least one transformer exciting network (TEN) adapted to supply a low-impedance path to ground in response to an excitation current. The excitation current has a non-DSL frequency, and the low-imped... | 10/07/2008 |
| 7424060 | Transformer data coupler with high common mode immunity A data coupler comprises two CMOS drivers which are supplied with a data signal and a delayed version of the data signal to drive a primary winding of a transformer with narrow pulses of opposite polarity corresponding to respective edges of the data signal. A secon... | 09/09/2008 |
| 7424228 | High dynamic range radio frequency to optical link A communication system includes an optical transmitter which is differentially driven and an optical receiver that outputs a differential signal. The optical transmitter creates the differential drive signal from an input signal and delivers the differential drive s... | 09/09/2008 |
| 7421028 | Transformer isolator for digital power supply A system for providing voltage isolation includes the first and second chips, each containing functional circuitry. The chips are interconnected via at least one RF isolation link that provides voltage isolation between the first chip and the second chip. ... | 09/02/2008 |
| 7414518 | Power line communication device and method A signal is received from a first portion of a power line via a connection to the power line and at least a portion of the signal is converted to a non-electrically conducting signal. The non-electrically conducting signal may be communicated to a non-electrically c... | 08/19/2008 |
| 7408996 | Method and apparatus for synchronization of data in a transformer circuit A method and apparatus for synchronizing the secondary side to the primary side of a transformer circuit are presented. A preamble which consists primarily of data pulses and inverted power pulses is used initially to obtain the parameters for and to set up a phase ... | 08/05/2008 |
| 7394857 | Flexible versatile low-cost wireline transmit driver A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation. ... | 07/01/2008 |
| 7373528 | Increased power for power over Ethernet applications According to one embodiment of the invention, a method for supplying power over Ethernet includes determining whether a first port of power sourcing equipment is supplying current to a power over Ethernet device in a predetermined current range. The method also incl... | 05/13/2008 |
| 7372280 | Method and system for transmitting an information signal over a power cable The invention relates to a method for inputting an information signal into a power cable which is connected to a voltage supply and which includes at least one or more conductors, a dielectric provided around the conductors and a conductive earth sheath arranged who... | 05/13/2008 |
| 7369045 | Monitoring system and device for an electric power line network A device is provided for monitoring an electric overhead line, which device is constituted by an independently operating real time multisensor for mounting in a position on a span of the overhead line. The device has a built-in transmitter for transmitting sensor si... | 05/06/2008 |
| 7369605 | Method and device for injecting a differential current noise signal into a paired wire communication link The present invention relates to a device and method for injecting a noise signal into a wire pair of a communication link. In operation a first current source and a second current source are disposed in series with a node therebetween coupled resistively to a wire ... | 05/06/2008 |
| 7366297 | Method and system for converting alternating current to ethernet in-line power According to one embodiment, a method for converting alternating current voltage signals to Ethernet in-line power includes converting an alternating current voltage signal to an approximate direct current voltage signal, adding at least one odd harmonic of the appr... | 04/29/2008 |
| 7362857 | Subscriber line interface circuitry transceiver A subscriber line interface circuit apparatus includes a first driver for driving a downstream data signal in a non-voiceband range onto a subscriber line and a second driver for driving a downstream voice signal in a voiceband range onto the subscriber line. The ap... | 04/22/2008 |
| 7356785 | Optimizing IC clock structures by minimizing clock uncertainty A process is provided for optimizing a clock net in the form of a tree having a root defined by a driver pin and a plurality of leaves defined by driven pins. The process includes forcing a first buffer to a center of gravity of the plurality of leaves, inserting a ... | 04/08/2008 |
| 7356086 | Power line coupler adapted for use with multiple service panels Systems and methods for interfacing a power line communications (PLC)-enabled communication device in a building with a power network are disclosed. In various embodiments, a system can include a specially-configured coupler that enables a common PLC communications ... | 04/08/2008 |
| 7349325 | Broadband over low voltage power lines communications system and method A power line communications (PLC) system and method for providing broadband communications over a low voltage power line are disclosed. The system and method comprise a manager that controls access to a bridge for a client where the bridge communicates with the mana... | 03/25/2008 |
| RE40149 | Method and apparatus for RF common-mode noise rejection in a DSL receiver A receiver for high-speed data communications, which receives a differential signal through a pair of signal lines. The receiver includes a common-mode choke, which has first and second signal windings, which are respectively coupled in series to the pair of signal ... | 03/11/2008 |
| 7339458 | Power line communications interface and surge protector There is provided a system that includes an AC power input port for connection to an AC power line, an AC power output port for providing power from the AC power line, an AC power surge suppression circuit for limiting voltage at the AC power output port, a data por... | 03/04/2008 |
| 7339466 | Power line communication system with system member identification An electric power line communication system operates with an electric power distribution system to provide, via premises power distribution lines, communication links among power line communication devices associated with the premises power distribution lines. A sen... | 03/04/2008 |
