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| Number | Title | Issue Date |
| 8358492 | Surge protection systems and methods for ethernet communication equipment in outside plant environments The present disclosure generally pertains to surge protection systems that protect outside plant equipment from high-energy surges. In one exemplary embodiment, a protection system is used for protecting Ethernet equipment that is coupled to an outside Ethernet cabl... | 01/22/2013 |
| 8305144 | Circuits and methods for controlling quiescent current in amplifiers A power amplifier provides relatively stable quiescent current while maintaining relatively high signal gains and peak to quiescent current ratios. The power amplifier has an input stage and a current mirror stage and incorporates a control transistor between these ... | 11/06/2012 |
| 8243412 | Surge protection systems and methods for outside plant ethernet The present disclosure generally pertains to surge protection systems that protect outside plant equipment from high-energy surges. In one exemplary embodiment, a protection system is used for protecting Ethernet equipment that is coupled to an outside Ethernet cabl... | 08/14/2012 |
| 8027461 | Systems and methods for splitting telecommunication signals with reduced noise A telecommunication system has a telecommunication line for communicating a combined signal and a splitter that is coupled to the telecommunication line. The splitter has a high-pass filter, a low-pass filter, and a current limiter. The high-pass filter is configure... | 09/27/2011 |
| 7821758 | Systems and methods for reducing intermodulation distortion Protection circuits for protecting equipment connected to a telecommunication wire pair is disclosed. A protection circuit in one embodiment utilizes a series arrangement of solid state protectors wherein at least some of the solid state protectors are biased. The p... | 10/26/2010 |
| 7809076 | Adaptive interference canceling system and method A communication system adaptively cancels noise and/or interference from signals communicated through a communication channel, such as signals communicated by a telecommunication network. The system, based on a common mode signal of a received signal, generates an e... | 10/05/2010 |
| 7794290 | Communications connector configured for low crosstalk A communications connector includes an electrically non-conductive connector body having a terminal face. A plurality of connector terminals are positioned on the terminal face and arranged in a plurality of Tip/Ring terminal pairs, which are positioned substantiall... | 09/14/2010 |
| 7773744 | System and method for terminating sealing current A sealing current system for a subscriber line that comprises a power source coupled to a first end of the subscriber line configured to apply a voltage to the subscriber line. The sealing current termination circuit coupled to a second end of the subscriber line co... | 08/10/2010 |
| 7701689 | Protector block assembly for providing surge protection in telecommunication systems A protector block assembly interfaces a plurality of subscriber lines to communication equipment, such as digital subscriber line (DSL) modems. The assembly has a protector block into which surge protection modules are plugged. Each surge protection module limits th... | 04/20/2010 |
| 7593494 | System and method for canceling impulse noise A system for canceling impulse noise comprises an adaptive impulse canceler and a combiner. The adaptive impulse canceler is configured to receive a common mode component of a received signal and to detect a noise impulse in the common mode component. The impulse ca... | 09/22/2009 |
| 7478029 | Cable simulation device and method A cable simulator that comprises an input device configured to receive a communication signal. The cable simulator further comprises a circuit configured to simulate attenuation in both the differential mode and common mode components of a communication signal. ... | 01/13/2009 |
| 7262664 | Circuit and method for controlling quiescent current of an amplifier Typical amplifier circuits used to implement various type of power amplifiers, including line drivers, are capable of supplying high output currents while maintaining a low standby current. Variation in the manufacturing process, however, can lead to large variation... | 08/28/2007 |
| 7130412 | Telecommunication line driver having synthesized output impedance derived from output current sensing circuit A synthetic impedance telecommunication line driver has no electrical energy-dissipating elements in series with its output, and synthesizes its output impedance in accordance with current fed back from an output current (mirror) sensing circuit. This allows the dri... | 10/31/2006 |
| 7116256 | Pulse shaping apparatus and method A system has a first digital-to-analog (D/A) converter to receive a digital signal and to convert the digital signal into an analog pulse, a second D/A converter to cancel residual energy resulting from a previous pulse if a predetermined sequence of digital data is... | 10/03/2006 |
| 6975706 | Capacitance measurement-based mechanism for locating open telecommunication line fault To locate an open fault along a telecommunication wireline pair, a prescribed frequency tone is coupled to the wireline pair by way of a center tap of the transformer through which a line card is coupled to a subscriber loop. The line card's analog front end conduct... | 12/13/2005 |
| 6937095 | Efficient, switched linear signal driver The invention provides a switched linear amplifier for amplifying an input signal for provision to a communication medium. The switched linear amplifier includes a linear amplifier, an output current detector, and a switched inductive circuit. The linear amplifier a... | 08/30/2005 |
| 6580327 | Electronically controllable slope equalizer The present invention provides a slope equalizer for use in a voice frequency channel card, which is preferably electronically and remotely controllable, and retrocompatible with existing telecommunication systems. The slope equalizer of the invention inc... | 06/17/2003 |
| 6437574 | Auxiliary battery test and alarm system for telecommunication equipment An automated battery test system determines the performance capability of an auxiliary battery used as a back-up power source for an electrically powered system in the event of a deficiency in a primary power source. The test system periodically isolates ... | 08/20/2002 |
| 6359505 | Complementary pair-configured telecommunication line driver having synthesized output impedance A synthetic impedance line driver for driving a telecommunication line includes a complementary operational amplifier pair having cross-coupled positive feedback summing resistors. The driver circuit is configured to provide a relatively large multiplicat... | 03/19/2002 |
| 5856758 | Low distortion driver employing positive feedback for reducing power loss in output impedance that effectively matches the impedance of driven line A line driver with positive feedback reduces the output signal amplitude excursion required for driving a communication line, and enables the driver's output impedance to be synthesized using a reduced component value, thereby achieving a reduction in pow... | 01/05/1999 |
