Patents by Inventor Kedar Godbole
Kedar Godbole 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).
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Patent number: 9179509Abstract: A circuit in accordance with one embodiment of the invention can include a light emitting diode (LED) assembly comprising a plurality of LED channels that are controlled independently with a switch mode driver. The circuit also includes N+1 wires coupled to said LED assembly, where N is equal to the number of said plurality of LED channels of said LED assembly.Type: GrantFiled: December 9, 2008Date of Patent: November 3, 2015Assignee: Google Inc.Inventors: Kedar Godbole, Hariom Rai
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Patent number: 9095027Abstract: A circuit coupled to a light emitting diode (LED) driver circuit is described. The circuit is operative to control functionality of the LED driver circuit based on a firing angle from a power switch.Type: GrantFiled: November 14, 2013Date of Patent: July 28, 2015Assignee: Google Inc.Inventors: Kedar Godbole, Douglas Vargha
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Patent number: 8985850Abstract: An adaptive algorithm running on a processing device receives a temperature value that represents a temperature at a gate terminal of a transistor. The adaptive algorithm, determines a drive strength value that represents a drive strength for a signal based on the temperature value. A signal with the determined drive strength is applied to the gate terminal of the transistor.Type: GrantFiled: October 1, 2010Date of Patent: March 24, 2015Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Hariom Rai, Anita Meng
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Patent number: 8829811Abstract: An embodiment of the present invention is directed to a method and circuit to control light emitting diode (LED) output. The method includes receiving a line voltage signal which powers a lighting circuit comprising an LED and determining an adjustment of a threshold based on a variation of the line voltage signal and/or a controller delay or other practical controller limitation or imperfection. The method further includes dynamically adjusting a threshold or other reference of a controller which controls a switch of said lighting circuit for compensating for line variations to maintain a substantially uniform LED current.Type: GrantFiled: November 18, 2008Date of Patent: September 9, 2014Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Hariom Rai
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Publication number: 20140191675Abstract: One embodiment in accordance with the invention can include a circuit for controlling a light emitting diode (LED) lighting fixture via a power line. The circuit can include a power switch coupled to the power line and is for outputting a firing angle. Additionally, the circuit can include a control circuit coupled to the power switch and is for implementing firing angle control of the power switch. Furthermore, the circuit can include a translator coupled to receive the firing angle and for mapping the firing angle to a function of the LED lighting fixture.Type: ApplicationFiled: November 14, 2013Publication date: July 10, 2014Applicant: Cypress Semiconductor CorporationInventors: Kedar Godbole, Douglas Vargha
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Patent number: 8598812Abstract: One embodiment in accordance with the invention can include a circuit for controlling a light emitting diode (LED) lighting fixture via a power line. The circuit can include a power switch coupled to the power line and is for outputting a firing angle. Additionally, the circuit can include a control circuit coupled to the power switch and is for implementing firing angle control of the power switch. Furthermore, the circuit can include a translator coupled to receive the firing angle and for mapping the firing angle to a function of the LED lighting fixture.Type: GrantFiled: April 1, 2013Date of Patent: December 3, 2013Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Doung Vargha
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Patent number: 8519640Abstract: One embodiment in accordance with the invention can include a circuit for controlling a light emitting diode (LED) lighting fixture via a power line. The circuit can include a power switch coupled to the power line and is for outputting a firing angle. Additionally, the circuit can include a control circuit coupled to the power switch and is for implementing firing angle control of the power switch. Furthermore, the circuit can include a translator coupled to receive the firing angle and for mapping the firing angle to a function of the LED lighting fixture.Type: GrantFiled: July 17, 2009Date of Patent: August 27, 2013Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Doug Vargha
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Patent number: 8508330Abstract: A processing circuit may include a command source that receives at least one feature input control signal for a lighting fixture; and an adaptive filtering mechanism that generates a filtered control signal in response to the input control signal, wherein the adaptive filtering mechanism varies a filter function in response to at least a temporal state of the input control signal.Type: GrantFiled: May 25, 2010Date of Patent: August 13, 2013Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Chi Wang Ng
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Patent number: 8487547Abstract: A circuit in accordance with one embodiment of the invention can include an LED drive circuit that may isolate a sense circuit from a supply voltage in a passive mode, and maintain a predetermined voltage difference between the sense circuit and the supply voltage in an operational mode.Type: GrantFiled: July 6, 2010Date of Patent: July 16, 2013Assignee: Cypress Semiconductor CorporationInventor: Kedar Godbole
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Patent number: 8466634Abstract: A driver circuit, and light emitting system and method are provided. The driver circuit includes possibly a controller and a phase detector coupled to produce an intermittent output proportional to a value of an input relative to upper and lower threshold values, and a difference between the input signal, which is the intermittent output signal, and a reference value. The light emitting system can include a switch and at least one light emitting device coupled to the switch. The driver circuit can be coupled to forward the intermittent output signal to the switch that is active in proportion to current level through the light emitting device, rising and falling between the modifiable upper and lower threshold values.Type: GrantFiled: December 18, 2008Date of Patent: June 18, 2013Assignee: Cypress Semiconductor CorporationInventor: Kedar Godbole
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Patent number: 8362706Abstract: Disclosed herein is an apparatus and method to control a current through one or more Light Emitting Diode (LED) circuits, wherein a control command compensation unit generates a compensation function to offset errors in the LED circuit by modifying a temporal density modulation function.Type: GrantFiled: December 19, 2008Date of Patent: January 29, 2013Assignee: Cypress Semiconductor CorporationInventor: Kedar Godbole
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Patent number: 8253339Abstract: A circuit may include a switch mode power converter that intermittently enables a current path in response to a switch control signal; a duty cycle measurement circuit that generates a duty cycle value corresponding to a duty cycle of the switch control signal; and an evaluation circuit that activates a failure indication in response to the duty cycle value being outside of at least one limit.Type: GrantFiled: July 16, 2010Date of Patent: August 28, 2012Inventors: Kedar Godbole, Hariom Rai
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Patent number: 8154221Abstract: One embodiment in accordance with the invention can include a circuit for controlling a light emitting diode (LED) lighting fixture via a power line. The circuit can include a power switch coupled to the power line and is for outputting a firing angle. Additionally, the circuit can include a control circuit coupled to the power switch and is for implementing firing angle control of the power switch. Furthermore, the circuit can include a translator coupled to receive the firing angle and for mapping the firing angle to a function of the LED lighting fixture.Type: GrantFiled: December 22, 2008Date of Patent: April 10, 2012Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Doug Vargha
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Patent number: 8129916Abstract: A light emitting driver circuit, system, and method are provided. The driver circuit system and method can be implemented in various ways. An embodiment includes a bypass circuit which diverts current from the LEDs whenever a switch coupled to the LEDs incurs residual current when turned off. In an additional or alternative embodiment, the residual current can be sensed and the amount of residual current used to trigger fetching of a compensation value. That compensation value can change a dimming function forwarded to the switch in order to compensate for, offset, or substantially eliminate the residual current through that switch.Type: GrantFiled: September 26, 2008Date of Patent: March 6, 2012Assignee: Cypress Semiconductor CorporationInventor: Kedar Godbole
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Patent number: 8093835Abstract: A light emitting driver circuit, system, and method are provided. The driver circuit system and method can be implemented in various ways. An embodiment includes a bypass circuit which diverts current from the LEDs whenever a switch coupled to the LEDs incurs residual current when turned off. In an additional or alternative embodiment, the residual current can be sensed and the amount of residual current used to trigger fetching of a compensation value. That compensation value can change a dimming function forwarded to the switch in order to compensate for, offset, or substantially eliminate the residual current through that switch.Type: GrantFiled: September 26, 2008Date of Patent: January 10, 2012Assignee: Cypress Semiconductor CorporationInventors: Kedar Godbole, Hariom Rai
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Publication number: 20100264836Abstract: A circuit in accordance with one embodiment of the invention can include an LED drive circuit that may isolate a sense circuit from a supply voltage in a passive mode, and maintain a predetermined voltage difference between the sense circuit and the supply voltage in an operational mode.Type: ApplicationFiled: July 6, 2010Publication date: October 21, 2010Applicant: CYPRESS SEMICONDUCTOR CORPORATIONInventor: Kedar Godbole
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Publication number: 20100123411Abstract: An embodiment of the present invention is directed to a method and circuit to control light emitting diode (LED) output. The method includes receiving a line voltage signal which powers a lighting circuit comprising an LED and determining an adjustment of a threshold based on a variation of the line voltage signal and/or a controller delay or other practical controller limitation or imperfection. The method further includes dynamically adjusting a threshold or other reference of a controller which controls a switch of said lighting circuit for compensating for line variations to maintain a substantially uniform LED current.Type: ApplicationFiled: November 18, 2008Publication date: May 20, 2010Applicant: CYPRESS SEMICONDUCTOR CORPORATIONInventors: Kedar Godbole, Hariom Rai
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Publication number: 20100079074Abstract: A light emitting driver circuit, system, and method are provided. The driver circuit system and method can be implemented in various ways. An embodiment includes a bypass circuit which diverts current from the LEDs whenever a switch coupled to the LEDs incurs residual current when turned off. In an additional or alternative embodiment, the residual current can be sensed and the amount of residual current used to trigger fetching of a compensation value. That compensation value can change a dimming function forwarded to the switch in order to compensate for, offset, or substantially eliminate the residual current through that switch.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Applicant: CYPRESS SEMICONDUCTOR CORPORATIONInventor: Kedar Godbole
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Publication number: 20100079090Abstract: A light emitting driver circuit, system, and method are provided. The driver circuit system and method can be implemented in various ways. An embodiment includes a bypass circuit which diverts current from the LEDs whenever a switch coupled to the LEDs incurs residual current when turned off. In an additional or alternative embodiment, the residual current can be sensed and the amount of residual current used to trigger fetching of a compensation value. That compensation value can change a dimming function forwarded to the switch in order to compensate for, offset, or substantially eliminate the residual current through that switch.Type: ApplicationFiled: September 26, 2008Publication date: April 1, 2010Applicant: Cypress Semiconductor CorporationInventors: Kedar Godbole, Hariom Rai
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Publication number: 20090267534Abstract: A circuit in accordance with one embodiment of the invention can include a light emitting diode (LED) assembly comprising a plurality of LED channels that are controlled independently with a switch mode driver. The circuit also includes N+1 wires coupled to said LED assembly, where N is equal to the number of said plurality of LED channels of said LED assembly.Type: ApplicationFiled: December 9, 2008Publication date: October 29, 2009Applicant: Cypress Semiconductor CorporationInventors: Kedar Godbole, Hariom Rai