Patents by Inventor Roland S. Saint-Pierre
Roland S. Saint-Pierre 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: 9780666Abstract: A switch mode power converter includes a primary side, an energy transfer element, and a secondary side. The secondary side includes output terminals coupled to a load and an output capacitance across the output terminals. The secondary side further includes a compensation signal generator—configured to generate a compensation signal. The compensation signal compensates charging the output capacitance with power transferred from the primary side to the secondary side. The secondary side further includes computational circuitry configured to output an adjusted compensation signal that compensates, based on the compensation signal, one of an output sense signal representative of an output signal at the output terminals and a reference signal representative of a desired output voltage of the switch mode power converter. The secondary side further includes a comparator to compare the adjusted compensation signal with the other one of the output sense signal and the reference signal.Type: GrantFiled: April 6, 2015Date of Patent: October 3, 2017Assignee: Power Integrations, Inc.Inventors: Arthur B. Odell, Vikram Balakrishnan, Roland S. Saint-Pierre, Jr.
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Publication number: 20160141961Abstract: A switch mode power converter includes a primary side, an energy transfer element, and a secondary side. The secondary side includes output terminals coupled to a load and an output capacitance across the output terminals. The secondary side further includes a compensation signal generator—configured to generate a compensation signal. The compensation signal compensates charging the output capacitance with power transferred from the primary side to the secondary side. The secondary side further includes computational circuitry configured to output an adjusted compensation signal that compensates, based on the compensation signal, one of an output sense signal representative of an output signal at the output terminals and a reference signal representative of a desired output voltage of the switch mode power converter. The secondary side further includes a comparator to compare the adjusted compensation signal with the other one of the output sense signal and the reference signal.Type: ApplicationFiled: April 6, 2015Publication date: May 19, 2016Inventors: Arthur B. ODELL, Vikram BALAKRISHNAN, Roland S. SAINT-PIERRE, Jr.
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Patent number: 8537582Abstract: An example controller for providing power factor correction and a constant current output in a power supply includes a means for generating a delayed ramp signal and a means for integrating an input current sense signal representative of an input current and for generating an input charge signal in response thereto. The controller also includes a means for determining a ratio of an input voltage sense signal to an output voltage sense signal and for generating an input charge control signal responsive to the input charge signal and the ratio of the input voltage sense signal to the output voltage sense signal. A means for comparing the input charge control signal to the delayed ramp signal to generate a drive signal to control a switch of the power supply is also included.Type: GrantFiled: September 27, 2012Date of Patent: September 17, 2013Assignee: Power Integrations, Inc.Inventor: Roland S. Saint-Pierre
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Patent number: 8305787Abstract: An example controller includes a delayed ramp generator, an integrator, an arithmetic operator, and a drive signal generator. The integrator integrates an input current sense signal representative of an input current of the power supply to generate an input charge signal. The input current has a pulsating waveform with a period that is a switching period of a switch of the power supply. The arithmetic operator circuit generates an input charge control signal responsive to the input charge signal and a ratio of a rectified input voltage to a dc output voltage of the power supply. The drive signal generator produces a drive signal responsive to the input charge control signal and a delayed ramp signal generated by the drive signal generator to control the switch.Type: GrantFiled: December 16, 2011Date of Patent: November 6, 2012Assignee: Power Integrations, Inc.Inventor: Roland S. Saint-Pierre
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Publication number: 20120086421Abstract: An example controller includes a delayed ramp generator, an integrator, an arithmetic operator, and a drive signal generator. The integrator integrates an input current sense signal representative of an input current of the power supply to generate an input charge signal. The input current has a pulsating waveform with a period that is a switching period of a switch of the power supply. The arithmetic operator circuit generates an input charge control signal responsive to the input charge signal and a ratio of a rectified input voltage to a dc output voltage of the power supply. The drive signal generator produces a drive signal responsive to the input charge control signal and a delayed ramp signal generated by the drive signal generator to control the switch.Type: ApplicationFiled: December 16, 2011Publication date: April 12, 2012Applicant: POWER INTEGRATIONS, INC.Inventor: Roland S. Saint-Pierre
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Patent number: 8098506Abstract: An example controller includes first, second and third inputs, a delayed ramp generator and a drive signal generator. The first, second and third inputs are coupled to receive an input voltage sense signal, an output voltage sense signal, and an input current sense signal, respectively. The drive signal generator is coupled to receive an input charge control signal generated by an input charge control signal generator and a delayed ramp signal generated by a delayed ramp generator. The input charge control signal is generated responsive to an integral of the input current sense signal multiplied by a ratio of the input voltage sense signal to the output voltage sense signal, where the drive signal generator produces a drive signal responsive to the input charge control signal and the delayed ramp signal, the drive signal to be coupled to control a switch of a power supply to regulate an output of the power supply.Type: GrantFiled: June 2, 2009Date of Patent: January 17, 2012Assignee: Power Integrations, Inc.Inventor: Roland S. Saint-Pierre
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Publication number: 20100302811Abstract: An example controller includes first, second and third inputs, a delayed ramp generator and a drive signal generator. The first, second and third inputs are coupled to receive an input voltage sense signal, an output voltage sense signal, and an input current sense signal, respectively. The drive signal generator is coupled to receive an input charge control signal generated by an input charge control signal generator and a delayed ramp signal generated by a delayed ramp generator. The input charge control signal is generated responsive to an integral of the input current sense signal multiplied by a ratio of the input voltage sense signal to the output voltage sense signal, where the drive signal generator produces a drive signal responsive to the input charge control signal and the delayed ramp signal, the drive signal to be coupled to control a switch of a power supply to regulate an output of the power supply.Type: ApplicationFiled: June 2, 2009Publication date: December 2, 2010Applicant: Power Integrations, Inc.Inventor: Roland S. Saint-Pierre
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Patent number: 7453710Abstract: An apparatus and method are disclosed to provide transformerless safety isolation in a power supply. One example regulated power converter includes input terminals included in a primary circuit of the power converter. Output terminals are included in a secondary circuit of the power converter. A plurality of safety capacitors including first and second safety capacitors are also included. Each of the plurality of safety capacitors includes a respective first terminal coupled to the primary circuit and a respective second terminal coupled to the secondary circuit. The plurality of safety capacitors galvanically isolates the primary circuit from the secondary circuit. A power switch is included in the primary circuit. The power switch is coupled such that switching of the power switch causes energy to transfer between the primary and secondary circuits through the plurality of safety capacitors.Type: GrantFiled: April 26, 2006Date of Patent: November 18, 2008Assignee: Power Integrations, Inc.Inventors: Stefan Bäurle, David Michael Hugh Matthews, Roland S. Saint-Pierre
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Patent number: 6340876Abstract: A system and method for detecting battery removal or absent battery condition in a charger without use of external stimulus such as a thermistor, EEPROM, or additional pin. The system and method use information solely available from the charger positive and negative terminals to correctly annunciate the current state of the charger to a host or end-user.Type: GrantFiled: September 18, 2000Date of Patent: January 22, 2002Assignee: Texas Instruments IncorporatedInventor: Roland S. Saint-Pierre
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Patent number: 5815382Abstract: A tracking circuit for a power supply comprises an inverter (68), a summing network (70), and a driver circuit (72). The inverter inverts a feedback voltage, which is a variable load voltage level, about an inverter reference voltage level to provide an inverter output voltage level. The inverter output voltage level is summed or averaged with the output voltage of the power supply with respect to the voltage of the return line (54) to provide a summing voltage. The driver circuit signals the primary control circuit (35) to adjust the power supply output voltage level so that the summing voltage is held constant and equal with a driver reference voltage level.Type: GrantFiled: May 6, 1996Date of Patent: September 29, 1998Assignee: Motorola, Inc.Inventors: Roland S. Saint-Pierre, Dipti V. Vashi, Jose' M. Fernandez