Patents by Inventor Dror Korcharz
Dror Korcharz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9823732Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.Type: GrantFiled: September 7, 2016Date of Patent: November 21, 2017Assignee: Cisco Technology Inc.Inventors: Amir Lehr, Ilan Atias, Dror Korcharz, David Pincu
-
Patent number: 9606596Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.Type: GrantFiled: September 16, 2013Date of Patent: March 28, 2017Assignee: Cisco Technology Inc.Inventors: Amir Lehr, Iian Atias, Dror Korcharz, David Pincu
-
Publication number: 20170060228Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.Type: ApplicationFiled: September 7, 2016Publication date: March 2, 2017Inventors: Amir Lehr, llan Atias, Dror Korcharz, David Pincu
-
Patent number: 9362828Abstract: A converter constituted of: an inductor; a plurality of electronically controlled switches; and a control circuitry arranged to operate in a buck-boost mode responsive to the output voltage of the converter being within a predetermined range of the input voltage of the converter, the control circuitry arranged in the buck-boost mode: responsive to a current flowing through the inductor being lower than a predetermined low current threshold, to control the switches to couple the inductor between the input voltage and a common potential; responsive to the current flowing through the inductor being greater than a predetermined medium current threshold, to control the switches to couple the inductor between the input voltage and the output voltage; and responsive to the current flowing through the inductor being greater than a predetermined high current threshold, to control the switches to couple the inductor between the output voltage and the common potential.Type: GrantFiled: February 4, 2014Date of Patent: June 7, 2016Assignee: Microsemi CorporationInventors: Arkadiy Peker, Kevin Mark Smith, Jr., Dror Korcharz
-
Publication number: 20140217996Abstract: A converter constituted of: an inductor; a plurality of electronically controlled switches; and a control circuitry arranged to operate in a buck-boost mode responsive to the output voltage of the converter being within a predetermined range of the input voltage of the converter, the control circuitry arranged in the buck-boost mode: responsive to a current flowing through the inductor being lower than a predetermined low current threshold, to control the switches to couple the inductor between the input voltage and a common potential; responsive to the current flowing through the inductor being greater than a predetermined medium current threshold, to control the switches to couple the inductor between the input voltage and the output voltage; and responsive to the current flowing through the inductor being greater than a predetermined high current threshold, to control the switches to couple the inductor between the output voltage and the common potential.Type: ApplicationFiled: February 4, 2014Publication date: August 7, 2014Applicant: Microsemi CorporationInventors: Arkadiy PEKER, Kevin Mark SMITH, JR., Dror KORCHARZ
-
Publication number: 20140018970Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.Type: ApplicationFiled: September 16, 2013Publication date: January 16, 2014Inventors: Amir Lehr, Ilan Atias, Dror Korcharz, David Pincu
-
Patent number: 8559996Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.Type: GrantFiled: January 14, 2007Date of Patent: October 15, 2013Assignee: Cisco Technology Inc.Inventors: Amir Lehr, Ilan Atias, Dror Korcharz, David Pincu
-
Patent number: 8482218Abstract: A lighting circuit constituted of: a single dimming input; a pulse width modulation acceptance circuit arranged to convert a pulse width modulated dimming signal received at the single dimming input into a local dimming signal, the local dimming signal exhibiting a predetermined format; an analog voltage level acceptance circuit arranged to convert an analog voltage dimming signal received at the single dimming input into the local dimming signal exhibiting the predetermined format; and a luminaire driving circuit responsive to the local dimming signal.Type: GrantFiled: January 31, 2011Date of Patent: July 9, 2013Assignee: Microsemi CorporationInventors: Shiju Wang, Chien Nguyen, Hwangsoo Choi, Arkadiy Peker, Migel Jacubovski, Alon Ferentz, Dror Korcharz
-
Patent number: 8461764Abstract: An LED driver arrangement wherein a low voltage IC is arranged to sample the voltage at a terminal of each of the respective electronically controlled switches controlling a plurality of LED strings each receiving power from a single source, with the single source providing voltage in excess of the voltage rating of the IC. For each electronically controlled switch a controllable current source and an isolating unidirectional electronic valve is provided, the respective current source being enabled only when the respective associated electronically controlled switch is at least partially closed thereby ensuring that the respective isolating unidirectional electronic valve associated with the respective illuminating LED string conducts, and the voltage at the terminal of the respective electronically controlled switch is thus seen by the IC when the associated LED string is producing illumination, the voltage then being lower than the maximum voltage rating of the IC.Type: GrantFiled: April 11, 2011Date of Patent: June 11, 2013Assignee: Microsemi CorporationInventors: Arkadiy Peker, Dror Korcharz, Paul Okada
-
Patent number: 8378586Abstract: A backlight system for light emitting diodes (LEDs), the backlight system constituted of: a controllable power source; a plurality of LED based luminaires arranged to receive power in parallel from the controllable power source; a plurality of driving circuitries, each of the plurality of driving circuitries arranged to control the light output of at least two of the plurality of LED based luminaires and further arranged to output information regarding the voltage drop of at least one of the at least two LED based luminaires controlled thereby, wherein the controllable power source is arranged to output a voltage whose value is responsive to the output information.Type: GrantFiled: October 1, 2010Date of Patent: February 19, 2013Assignee: Microsemi CorporationInventors: Arkadiy Peker, Dror Korcharz, Shawn Anthony Fahrenbruch
-
Patent number: 8324830Abstract: A method of color control for a backlight utilizing colored light emitting diodes (LEDs), the method constituted of: providing a plurality of colored LED strings constituted of at least three different colors; lighting each of the plurality of colored LED strings to provide a backlight; providing a period wherein none of the colored LED strings are lit; obtaining during the provided period when none of the colored LED strings are lit, an indication of an ambient light; obtaining during the provided period when the colored LED strings are lit, an indication of the optical output of the colored LED strings; and controlling the lighting of the provided plurality of colored LED strings responsive to the received indication of ambient light and the received indication of the output of the colored LED strings. Preferably, the method is performed in cooperation with an on-board color sensor.Type: GrantFiled: January 28, 2010Date of Patent: December 4, 2012Assignee: Microsemi Corp.—Analog Mixed Signal Group Ltd.Inventors: Arkadiy Peker, Tamir Langer, Dror Korcharz
-
Patent number: 8169150Abstract: A chipset for powering and controlling a plurality of light emitting diode (LED) strings. The chipset includes a controller having a pulse width modulating (PWM) functionality and a data transfer interface circuitry; and at least one dissipative active element array comprising a plurality of dissipative active elements. The dissipative active element array(s) are packaged to be thermally separate from the controller. The PWM functionality is arranged to individually pulse width modulate a current flow through each of the LED strings. Each of the plurality of dissipative active elements is associated with a particular one of the plurality of LED strings and is arranged to limit the current flow of the pulse width modulated current that flows through the particular LED string to a value, the value being responsive to a value output by the controller via the data transfer interface circuitry.Type: GrantFiled: August 16, 2009Date of Patent: May 1, 2012Assignee: Microsemi Corp.—Analog Mixed Signal Group Ltd.Inventors: Arkadiy Peker, Alon Ferentz, Dror Korcharz, Nadav Barnea, Migel Jacubovski, Itay Cohen, Gustavo Aizenberg
-
Publication number: 20110248639Abstract: An LED driver arrangement wherein a low voltage IC is arranged to sample the voltage at a terminal of each of the respective electronically controlled switches controlling a plurality of LED strings each receiving power from a single source, with the single source providing voltage in excess of the voltage rating of the IC. For each electronically controlled switch a controllable current source and an isolating unidirectional electronic valve is provided, the respective current source being enabled only when the respective associated electronically controlled switch is at least partially closed thereby ensuring that the respective isolating unidirectional electronic valve associated with the respective illuminating LED string conducts, and the voltage at the terminal of the respective electronically controlled switch is thus seen by the IC when the associated LED string is producing illumination, the voltage then being lower than the maximum voltage rating of the IC.Type: ApplicationFiled: April 11, 2011Publication date: October 13, 2011Applicant: MICROSEMI CORPORATIONInventors: Arkadiy PEKER, Dror KORCHARZ, Paul OKADA
-
Publication number: 20110187283Abstract: A lighting circuit constituted of: a single dimming input; a pulse width modulation acceptance circuit arranged to convert a pulse width modulated dimming signal received at the single dimming input into a local dimming signal, the local dimming signal exhibiting a predetermined format; an analog voltage level acceptance circuit arranged to convert an analog voltage dimming signal received at the single dimming input into the local dimming signal exhibiting the predetermined format; and a luminaire driving circuit responsive to the local dimming signal.Type: ApplicationFiled: January 31, 2011Publication date: August 4, 2011Applicant: Microsemi CorporationInventors: Shiju WANG, Chien NGUYEN, Hwangsoo CHOI, Arkadiy PEKER, Migel JACUBOVSKI, Alon FERENTZ, Dror KORCHARZ
-
Patent number: 7969430Abstract: A system for powering and controlling an LED backlight, the system comprising: a control circuitry; a controllable power source responsive to the control circuitry; and a plurality of LED strings receiving power from the controllable power source, the control circuitry being operative to control the output voltage of the controllable power source responsive to a function of an electrical characteristic of at least one of the plurality of LED strings.Type: GrantFiled: February 19, 2007Date of Patent: June 28, 2011Assignee: Microsemi Corp. - Analog Mixed Signal Group LtdInventors: Dror Korcharz, Alon Ferentz, Roni Blaut, Arkadiy Peker, Tamir Langer
-
Patent number: 7923943Abstract: A secondary side post regulator arrangement for a plurality of LED strings. For each secondary winding, a first electronically controlled switch is provided arranged to control the power output, and a LED string is connected thereto. A second electronically controlled switch is further connected in series with the LED string, arranged to receive a PWM signal, thereby pulsing current through the LED string. A current sensing element is further provided outputting a voltage representation of the current through the LED string, and a synchronized sampling circuit is provided arranged to sample the voltage representation during the on period of the second electronically controlled switch. The sampled and held voltage representation is compared with a reference signal and fed back to control the first electronically controlled switch. The voltage output associated with each secondary winding is controlled, responsive to the reference voltage.Type: GrantFiled: January 9, 2007Date of Patent: April 12, 2011Assignee: Microsemi Corp.—Analog Mixed Signal Group Ltd.Inventors: Arkadiy Peker, Dror Korcharz
-
Publication number: 20110080117Abstract: A backlight system for light emitting diodes (LEDs), the backlight system constituted of: a controllable power source; a plurality of LED based luminaires arranged to receive power in parallel from the controllable power source; a plurality of driving circuitries, each of the plurality of driving circuitries arranged to control the light output of at least two of the plurality of LED based luminaires and further arranged to output information regarding the voltage drop of at least one of the at least two LED based luminaires controlled thereby, wherein the controllable power source is arranged to output a voltage whose value is responsive to the output information.Type: ApplicationFiled: October 1, 2010Publication date: April 7, 2011Applicant: MICROSEMI CORPORATIONInventors: Arkadiy PEKER, Dror KORCHARZ, Shawn Anthony FAHRENBRUCH
-
Patent number: 7849343Abstract: 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.Type: GrantFiled: June 7, 2004Date of Patent: December 7, 2010Assignee: Microsemi Corp. - Analog Mixed Signal Group Ltd.Inventors: Alon Ferentz, Yair Darshan, Dror Korcharz
-
Patent number: 7812297Abstract: An optical sampling and control element for use with a luminaire exhibiting a cycle and a frame, the optical sampling and control element being constituted of a color sensor in optical communication with the luminaire; and a sampler connected to the outputs of the color sensor, the sampler comprising an integrator arranged to integrate the outputs of the color sensor over a predetermined period less than the frame.Type: GrantFiled: June 10, 2008Date of Patent: October 12, 2010Assignee: Microsemi Corp. - Analog Mixed Signal Group, Ltd.Inventors: Roni Blaut, Alon Ferentz, Arkadiy Peker, Dror Korcharz, Migel Jacubovski
-
Patent number: 7813752Abstract: A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising circuitry to control current of a power transmitted over communication cabling, the circuitry being operative to provide current limiting for the power at a first threshold, and delayed over current cut-off of the power at a second threshold, the second threshold being lower than the first threshold.Type: GrantFiled: November 22, 2005Date of Patent: October 12, 2010Assignee: Microsemi Corp. - Analog Mixed Signal Group Ltd.Inventors: Amir Lehr, Ilan Atias, Dror Korcharz, David Pincu