Tollgrade Communications, Inc.

Stryker Combo L.l.c.

Jeffrey A Gibala

Regis J Nero, Jr

Matthew G Cimbala

Steven P Day

Robert Dale Parks

Ryan Christopher Kaintz

Joy Cottrill

Roger Astbury Smith

James N Price

Thomas R Schneider, Jr

Gregory L Quiggle

Systems and methods are provided for generating an amplitude modulation signal to a switchmode power amplifier. A DC to DC switch is configured to receive a DC input voltage and to provide a DC output voltage. A low dropout regulator is configured to provide the amplitude modulation signal according to a modulation control signal received by the low dropout regulator. A control circuit is configured to establish a nominal operating power level for the power amplifier via the amplitude modulation signal and to maintain a minimum voltage difference between the DC output voltage and the low dropout regulator output. A modulator control circuit is configured to provide the modulation control signal to the low dropout regulator. The modulator control circuit provides the transition from a high amplitude to a low amplitude and a transition from the low amplitude to the high amplitude at configurable first and second slopes, respectively.

Systems and methods for providing modulation of switchmode RF power amplifiers

A system and method for testing a modem of a digital subscriber line access multiplexer (DSLAM) includes a pair of modems communicatively coupled to each other by way of a communications path that includes a first DSL communication medium connected to one modem, a second DSL communication medium connected to the other modem, which is part of the DSLAM, and an Ethernet medium connected between the first and second DSL modems. DSL signals can be dispatched from the first (or second) modem via the first (or second) DSL communication medium for receipt by the second (or first) DSL modem via the second (or first) DSL communication medium, whereupon, DSL signals passing from the first DSL communication medium to the second DSL communication medium, or vice versa, are converted into Ethernet packets for transmission over the Ethernet medium and then back into DSL signals.

Method and apparatus for remotely testing a digital subscriber line access multiplexer

A power distribution monitoring system includes a number of power line mounted monitors. Each monitor can acquire data regarding the delivery of electrical power in the power line, wirelessly transmit and receive messages, and electromagnetically acquire and store operating electrical power from electrical current flowing in the power line. The system also includes an aggregator that can wirelessly transmit and receive messages and wirelessly output beacon messages. In response to beacon signals wirelessly output by the aggregator, each monitor co-acts with the aggregator to dynamically build a wireless communication network for the wireless communication of the data acquired by the monitor regarding the delivery of electrical power in the power line to the aggregator.

Power distribution monitoring system and method

Line clamp

One or more pieces of equipment of a hybrid fiber-coaxial (HFC) network has a frequency agile transponder connected thereto. Each frequency agile transponder includes a transmitter (T) and a receiver (R) which are connectable to a coaxial line of the HFC network. Bidirectional communications can occur between a controller and each frequency agile transponder via the HFC network. The frequency agile transponder has analog inputs/outputs connectable to test points of the one or more pieces of equipment of the HFC network. The frequency agile transponder can test the test points and supply to the controller the results of the test. The transmit and receive center frequencies of the transmitter and receiver of the frequency agile transponder can be selectively and remotely adjusted by the controller to avoid signals at carrier frequencies utilized to transmit program material, data signals and/or telephony signals.

Frequency agile transponder

Growing community of inventors

North Huntingdon, PA, United States of America

Jeffrey A Gibala