Microsemi Corp-analog Mixed Signal Group, Ltd.

Powerdsine, Ltd.

Microsemi P.o.e Ltd.

Nevermore Solutions LLC

Microsemi Corp. - Analoged Mixed Signal Group Ltd

Yair Darshan

Alon Zeev Ferentz

Dror Korcharz

David Pincu

Ilan Atias

Arkadiy Peker

Roni Blaut

Eli Ohana

Amir Lehr

Shimon Elkayam

Nadav Barnea

Poldi Rimboim

Dan Admon

Yossi Shanava

Yuval Berson

Chii-Fa Chiou

David K Lacombe

Ezra Koper

Raanan Levi

Dror Korcheraz

An MPS generation method, the method constituted of: at a predetermined frequency, alternately outputting a first MPS current pulse for a predetermined first time period and not outputting the first MPS current pulse for a predetermined first off time period; during the first time period, determining the magnitude of a current drawn by an input capacitor of a DC to DC converter; and responsive to the determined input capacitor current magnitude, outputting between the first terminal and the second terminal a second MPS current pulse for a predetermined second time period during the predetermined first off time period.

MPS generation system and method

A PoE power utilization method constituted of: detecting a first function of a voltage between a current path node and a current return path node during a first time period and during a second time period, the second time period different than the first time period; sensing a second function of the magnitude of a current flowing through the current path during the second time period; responsive to the detected first time period voltage function, the detected second time period voltage function and the sensed second time period current magnitude function, determining a third function of a resistance seen by the current path; and outputting an indication of the determined resistance function.

PoE power utilization arrangement and method

A power over Ethernet (PoE) connection check method comprising: for a first time period, generating a first detection power over the first set of wires while not generating a second detection power over the second set of wires and obtaining a first indication of a power attribute over the first set of wires; during a second time period, generating the first detection power and generating a second detection power, greater than the first detection power, over the first set of wires; during the second time period, obtaining a second indication of the power attribute over the first set of wires; determining a first difference between the first indication and the second indication; and controlling a first power enable circuit and a second power enable circuit to provide power to the powered device over the first and second sets of wires respectively, responsive to the determined difference.

Poe four pair active detection apparatus and method

An integrated limiter and active filter constituted of: an input node; an output node; a transistor coupled between the input node and the output node; a first control circuit coupled to the control terminal of the transistor and arranged to limit the amount of current flowing through the output node to a predetermined value which is responsive to a signal received at a first reference input; a second control circuit coupled to the control terminal of the transistor and arranged to limit the voltage appearing at the output node to a predetermined value which is responsive to a signal received at a second reference input; and a third control circuit coupled to input node and arranged to provide the second reference input, the third control circuit arranged to set the second reference input responsive to the input voltage and to a predetermined maximum allowed output voltage.

Integrated limiter and active filter

A PoE midspan injector constituted of: an Ethernet device side data port; a PD side data port; a plurality of pairs of data wires coupling the Ethernet device and PD side data ports; a power reception port; a pair of first type coils; and a pair of second type coils, each second type coil coupled in series to a respective first type coil thereby forming a coil set, wherein the power reception port is coupled to each wire of a pair of data wire pairs at a respective power node, via a respective coil set, wherein the impedance of the first type coil is greater than the impedance of the second type coil when data is being transmitted at a minimum frequency, and wherein the impedance of the second type coil is greater than the impedance of the first type coil when data is being transmitted at a maximum frequency.

Power over ethernet midspan injection method and apparatus

A power saving arrangement for use with a phase cut dimmer, the power saving arrangement constituted of: a power converter arranged to convert a received alternating current power signal to a direct current signal; a detector arranged to detect the presence, or absence, of the phase cut dimmer blocking a portion of an alternating current mains power sine wave from reaching the power converter; and a controllable minimum holding current circuit in communication with the received alternating current power signal, the controllable minimum holding current circuit responsive to an output of the detector, wherein in the event that the detector detects the absence of the phase cut dimmer, the controllable minimum holding current circuit is disabled such that a minimum holding current is not provided.

Power saving arrangement for use with a user implementable phase cut dimmer

A circuit is provided. The circuit includes a control circuit, a voltage sensor coupled to the control circuit, and an indicator signal coupled to the control circuit. The control circuit, responsive to the voltage sensor, is configured to detect a first classification voltage within a classification voltage range defined by a lower classification voltage limit and upper classification voltage limit, detect, after detecting the first classification voltage, an indexing voltage outside of the classification voltage range, and detect, after detecting the indexing voltage, a second classification voltage within the classification voltage range. The control circuit is further configured to set the indicator signal to a first predetermined state indicating a power type based on the detected first classification voltage, indexing voltage and second classification voltage.

Circuit for indicating power level over a communication interface

A solid state lighting controller arranged for use with a single stage power factor correction switched mode power supply, a light emitting diode (LED) string and a current sense element arranged to sense current through the LED string, the solid state lighting controller constituted of: a current governor in series with the LED string exhibiting a governor differential amplifier and a governor electronically controlled switch responsive to the output of the governor differential amplifier, the current governor arranged to limit current flow through the LED string responsive to a current limit reference; and a feedback circuit exhibiting an error amplifier, the feedback circuit arranged to feedback a signal to the power factor correction switched mode power supply controller whose value is a function of the difference between the current through the LED string sensed by the current sense element and a target current signal.

LED string driver with power factor corrector and current governor

A phase cut angle converter with range detection for a phase cut dimmer constituted of: a phase cut angle detector arranged to detect the phase cut angle presented by the phase cut dimmer blocking a portion of an alternating current mains power sine wave from reaching a power converter, and output a signal whose value is responsive to the detected phase cut angle; a storage functionality constituted of a memory in communication with the phase cut angle detector, the storage functionality arranged to detect each of a minimum value and a maximum value for the detected phase cut angle of the phase cut angle detector and store the minimum value and the maximum value on the memory; and a signal adjustment functionality arranged to convert the detected phase cut angle to a dimming signal responsive to the stored minimum value and the maximum value for the detected phase cut angle.

User control of an LED luminaire for a phase cut dimmer

A method of classification of power requirements in a power over Ethernet system, the method comprising: providing a first classification voltage for a first classification cycle time, the provided first classification voltage being within a classification voltage range defined by a lower classification voltage limit and upper classification voltage limit; measuring a first current flow responsive to the provided first classification voltage; subsequent to the first classification cycle time, providing a voltage outside of the classification voltage range for a classification indexing time; subsequent to the classification indexing time, providing a second classification voltage for a second classification cycle time, the provided second classification voltage being within the classification voltage range; measuring a second current flow responsive to the provided second classification voltage; determining a classification responsive to the measured first current flow and the measured second current flow; and allocating power responsive to the determined classification.

Method and apparatus for indicating power level over a communication interface

A midspan unit arranged to supply power to a powered device over data communication cabling constituted of a signal conditioner exhibiting a transfer function with a gain of not less than &#x2212;0.4 dB as compared with: (K*(s+R/L+a)^m)/((s+R/L+b)^n) over a predetermined frequency range associated with the data transmitted from the powered device. s represents 2*&#x3c0;*(&#x221a;&#x2212;1)*f, wherein f represents the predetermined frequency range associated with the data terminal equipment to be powered. R represents the signal source impedance in parallel with the load termination impedance. Lrepresents the effective inductance of a data transformer winding of the data transmitter of the powered device, the effective inductance determined responsive to power received by the powered device from the power sourcing equipment; and Lrepresents the effective inductance of the data transformer winding of the data transmitter of the powered device expected by a receiver of the switch or hub equipment.

Compensation for high powered midspan power sourcing equipment

A PSE configured to determine the end of the start up phase at the PD responsive to a condition of the voltage at the PSE output. In one particular embodiment, the startup phase end is determined responsive to a PSE output voltage within a predetermined range of the PSE input voltage. In another particular embodiment, the startup phase end is determined responsive to the voltage drop associated with the PSE current limiter being lower than a predetermined maximum. In yet another particular embodiment, the startup phase end is determined responsive to the absolute value of the rate of change of the PSE output voltage being lower than a predetermined value. In yet another particular embodiment, the startup phase end is determined responsive to the absolute value of the rate of change of the voltage drop associated with the PSE current limiter being lower than a predetermined value.

Method and apparatus for detecting end of start up phase

A system for location identification in a local area network comprising: a current limited voltage source; a telecommunications outlet; communication cabling connecting the current limited voltage source to the telecommunications outlet; and a location identifier associated with the telecommunications outlet, the location identifier being responsive to a pre-determined voltage level from the current limited voltage source to transmit a multi-bit location data. In one embodiment the multi-bit location data is received at the power sourcing equipment and in another embodiment the multi-bit location data is received at a data terminal equipment connected to the telecommunications outlet.

System and method for location identification

A method for communicating settable priority data from a powered device being powered over communication cabling to power sourcing equipment, the method comprising: prior to connecting power to operational circuitry of the powered device, transmitting first multi-bit data from the powered device to the power sourcing equipment; subsequent to the transmitted first multi-bit data, connecting power received over the communication cabling to the powered device operational circuitry; receiving information from the powered device operational circuitry; disconnecting the received power from the powered device operational circuitry; and subsequent to the disconnecting, and prior to reconnecting power to the operational circuitry, transmitting second multi-bit data from the powered device to the power sourcing equipment, the second multi-bit data being a function of the received information, at least one of the first multi-bit data and the second multi-bit data being a function of a settable priority.

Powered device with priority indicator

A method and apparatus for preventing harmful transients resulting from a probing routine for a valid powered device detection signature in a network, the method comprising: operating power sourcing equipment to provide via its output port a pre-detection output voltage; obtaining an indication of the pre-detection output voltage; comparing the indication of the pre-detection output voltage with a pre-determined value; and in the event that the indication of the pre-detection output voltage is less than the pre-determined value; initiating a probing routine for a valid powered device detection signature. The higher voltage of the probing routine is thus not present at the output port in the absence of pre-detection of a potentially valid powered device detection signature.

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Petach Tikva, Israel

Yair Darshan