Patents by Inventor Yeshoda Yedevelly
Yeshoda Yedevelly 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: 9343971Abstract: A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control circuitry in an integrated circuit used to generate the pulse width modulated signal. The charging is stopped when either the charging current goes above a predetermined charging current level or when the capacitor voltage goes above a predetermined capacitor voltage.Type: GrantFiled: December 30, 2009Date of Patent: May 17, 2016Assignee: Silicon Laboratories Inc.Inventors: Yeshoda Yedevelly, Pavel Konecny, Wayne T. Holcombe
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Patent number: 8675374Abstract: Methods, systems, and devices are described for an adjustment module that interacts with a parameter detection module to provide a threshold value for initiating switching of a switching module in a cyclical electronic system. Aspects of the present disclosure provide a switching module used in conjunction with an inductor that is coupled with the switching module. The threshold voltage for switching the switching module may be adjusted to provide switching at substantially zero volts while maintaining sufficient energy in the inductor to drive the voltage at a switching element in the switching module to zero volts. Such auto-adjustment circuits may allow for enhanced efficiency in cyclical electronic systems. The output of an up/down counter may be used to set another parameter that effects the performance of the cyclical electronic system in order to enhance the performance of the cyclical electronic system.Type: GrantFiled: August 3, 2011Date of Patent: March 18, 2014Assignee: Microsemi CorporationInventors: Charles Coleman, Sam Seiichiro Ochi, Ernest H. Wittenbreder, Jr., Yeshoda Yedevelly
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Patent number: 8213192Abstract: A switching voltage regulator samples signals corresponding to a flyback voltage on an auxiliary winding on a primary side of the switching voltage regulator. The flyback voltage functions as feedback from the output voltage on the secondary side. On detection of presence of the flyback voltage, samples corresponding to the flyback voltage are stored until the flyback voltage falls below a threshold voltage. A history of N samples of the flyback voltage is thus maintained. A sample older than the most recently stored sample is used to generate control for generation of the output voltage of the switching voltage regulator. Use of the older sample ensures that the flyback voltage sample used is one that is close to, but before the current in the secondary winding goes to zero.Type: GrantFiled: December 30, 2009Date of Patent: July 3, 2012Assignee: Silicon Laboratories Inc.Inventors: Pavel Konecny, Yeshoda Yedevelly
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Publication number: 20120032728Abstract: Methods, systems, and devices are described for an adjustment module that interacts with a parameter detection module to provide a threshold value for initiating switching of a switching module in a cyclical electronic system. Aspects of the present disclosure provide a switching module used in conjunction with an inductor that is coupled with the switching module. The threshold voltage for switching the switching module may be adjusted to provide switching at substantially zero volts while maintaining sufficient energy in the inductor to drive the voltage at a switching element in the switching module to zero volts. Such auto-adjustment circuits may allow for enhanced efficiency in cyclical electronic systems. The output of an up/down counter may be used to set another parameter that effects the performance of the cyclical electronic system in order to enhance the performance of the cyclical electronic system.Type: ApplicationFiled: August 3, 2011Publication date: February 9, 2012Applicant: Microsemi CorporationInventors: Charles Coleman, Sam Seiichiro Ochi, Ernest H. Wittenbreder, JR., Yeshoda Yedevelly
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Publication number: 20110157941Abstract: A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control circuitry in an integrated circuit used to generate the pulse width modulated signal. The charging is stopped when either the charging current goes above a predetermined charging current level or when the capacitor voltage goes above a predetermined capacitor voltage.Type: ApplicationFiled: December 30, 2009Publication date: June 30, 2011Inventors: Yeshoda Yedevelly, Pavel Konecny, Wayne T. Holcombe
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Publication number: 20110157919Abstract: A voltage across a capacitor provides a supply voltage for circuits in an integrated circuit used to control a switching voltage regulator. The capacitor is charged during an OFF portion of a pulse width modulated (PWM) control signal that controls a first transistor in the switching voltage regulator. The voltage across the capacitor is controlled to be between a high threshold and a low threshold. The voltage is controlled by comparing the voltage across the capacitor to a low threshold and charging the capacitor during the OFF portion of the PWM signal if the voltage across the capacitor is below the low threshold. The voltage across the capacitor is compared to a high threshold and the capacitor is not charged if the voltage across the capacitor is above the high threshold.Type: ApplicationFiled: December 30, 2009Publication date: June 30, 2011Inventors: Yeshoda Yedevelly, Pavel Konecny
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Publication number: 20110157922Abstract: A switching voltage regulator samples signals corresponding to a flyback voltage on an auxiliary winding on a primary side of the switching voltage regulator. The flyback voltage functions as feedback from the output voltage on the secondary side. On detection of presence of the flyback voltage, samples corresponding to the flyback voltage are stored until the flyback voltage falls below a threshold voltage. A history of N samples of the flyback voltage is thus maintained. A sample older than the most recently stored sample is used to generate control for generation of the output voltage of the switching voltage regulator. Use of the older sample ensures that the flyback voltage sample used is one that is close to, but before the current in the secondary winding goes to zero.Type: ApplicationFiled: December 30, 2009Publication date: June 30, 2011Inventors: Pavel Konecny, Yeshoda Yedevelly
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Patent number: 7800415Abstract: In a particular embodiment, a circuit device includes a count zero circuit having a first counter to receive a clock signal and to produce a count zero signal based on the clock signal and having a second counter to generate a reset control signal to control a reset of the count zero circuit. The circuit device further includes a turnoff circuit to receive the clock signal and to produce a turn off signal based on the clock signal. Further, the circuit device includes a pulse width modulated (PWM) latch circuit adapted to produce a gate drive signal based on the count zero signal and the turn off signal, where timing of an edge of the gate drive signal varies based on the reset control signal.Type: GrantFiled: December 18, 2008Date of Patent: September 21, 2010Assignee: Silicon Laboratories, Inc.Inventors: Yeshoda Yedevelly, Weikang Cheng
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Publication number: 20100156493Abstract: In a particular embodiment, a circuit device includes a count zero circuit having a first counter to receive a clock signal and to produce a count zero signal based on the clock signal and having a second counter to generate a reset control signal to control a reset of the count zero circuit. The circuit device further includes a turnoff circuit to receive the clock signal and to produce a turn off signal based on the clock signal. Further, the circuit device includes a pulse width modulated (PWM) latch circuit adapted to produce a gate drive signal based on the count zero signal and the turn off signal, where timing of an edge of the gate drive signal varies based on the reset control signal.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Applicant: Silicon Laboratories, Inc.Inventors: Yeshoda Yedevelly, Weikang Cheng
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Patent number: 7365953Abstract: A circuit and method for emulating a component in a circuit are shown that control a current controlled oscillator with a first current that is proportional to a square of a load current of the component and also charge and discharge a high precision capacitor using the current controlled oscillator. The oscillations of the current controlled oscillator are counted to obtain a count value, which is transformed to a transformed current signal using a predetermined transfer function. The transformed current signal is subtracted from the first current that controls the current controlled oscillator. The transformed current signal is subtracted from a second current that is proportional to a square of the load current to determine whether the count value is incremented or decremented responsive to the oscillations of the current controlled oscillator.Type: GrantFiled: June 29, 2006Date of Patent: April 29, 2008Assignee: Integration Associates Inc.Inventors: Roger Biros, Yeshoda Yedevelly, Patrice Griffon
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Publication number: 20070024380Abstract: A circuit and method for emulating a component in a circuit are shown that control a current controlled oscillator with a first current that is proportional to a square of a load current of the component and also charge and discharge a high precision capacitor using the current controlled oscillator. The oscillations of the current controlled oscillator are counted to obtain a count value, which is transformed to a transformed current signal using a predetermined transfer function. The transformed current signal is subtracted from the first current that controls the current controlled oscillator. The transformed current signal is subtracted from a second current that is proportional to a square of the load current to determine whether the count value is incremented or decremented responsive to the oscillations of the current controlled oscillator.Type: ApplicationFiled: June 29, 2006Publication date: February 1, 2007Applicant: Integration Associates Inc.Inventors: Roger Biros, Yeshoda Yedevelly, Patrice Griffon