Patents by Inventor Parviz Parto
Parviz Parto 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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Publication number: 20170338171Abstract: In one implementation, a semiconductor package includes an integrated circuit (IC) flip chip mounted on a first patterned conductive carrier, a second patterned conductive carrier situated over the IC, and a magnetic material situated over the second patterned conductive carrier. The semiconductor package also includes a third patterned conductive carrier situated over the magnetic material. The second patterned conductive carrier and the third patterned conductive carrier are electrically coupled so as to form windings of an integrated inductor in the semiconductor package.Type: ApplicationFiled: May 20, 2016Publication date: November 23, 2017Inventors: Eung San Cho, Parviz Parto
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Publication number: 20170331371Abstract: A direct current to direct current (DC-DC) converter can include a chip embedded integrated circuit (IC), one or more switches, and an inductor. The IC can be embedded in a PCB. The IC can include driver, switches, and PWM controller. The IC and/or switches can include eGaN. The inductor can be stacked above the IC and/or switches, reducing an overall footprint. One or more capacitors can also be stacked above the IC and/or switches. Vias can couple the inductor and/or capacitors to the IC (e.g., to the switches). The DC-DC converter can offer better transient performance, have lower ripples, or use fewer capacitors. Parasitic effects that prevent efficient, higher switching speeds are reduced. The inductor size and overall footprint can be reduced. Multiple inductor arrangements can improve performance. Various feedback systems can be used, such as a ripple generator in a constant on or off time modulation circuit.Type: ApplicationFiled: August 4, 2017Publication date: November 16, 2017Inventor: Parviz Parto
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Patent number: 9768099Abstract: In one implementation, a semiconductor package includes an integrated circuit (IC) attached to a die paddle segment of a first patterned conduct carrier and coupled to a switch node segment of the first patterned conductive carrier by an electrical connector. In addition, the semiconductor package includes a second patterned conductive carrier situated over the IC, a magnetic material situated over the second patterned conductive carrier, and a third patterned conductive carrier situated over the magnetic material. The second patterned conductive carrier and the third patterned conductive carrier are electrically coupled so as to form windings of an integrated inductor in the semiconductor package.Type: GrantFiled: May 6, 2016Date of Patent: September 19, 2017Assignee: Infineon Technologies Americas Corp.Inventors: Eung San Cho, Parviz Parto
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Publication number: 20170229965Abstract: A direct current to direct current (DC-DC) converter can include a chip embedded integrated circuit (IC), one or more switches, and an inductor. The IC can be embedded in a PCB. The IC can include driver, switches, and PWM controller. The IC and/or switches can include eGaN. The inductor can be stacked above the IC and/or switches, reducing an overall footprint. One or more capacitors can also be stacked above the IC and/or switches. Vias can couple the inductor and/or capacitors to the IC (e.g., to the switches). The DC-DC converter can offer better transient performance, have lower ripples, or use fewer capacitors. Parasitic effects that prevent efficient, higher switching speeds are reduced. The inductor size and overall footprint can be reduced. Multiple inductor arrangements can improve performance. Various feedback systems can be used, such as a ripple generator in a constant on or off time modulation circuit.Type: ApplicationFiled: February 8, 2017Publication date: August 10, 2017Inventor: Parviz Parto
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Patent number: 9729059Abstract: A direct current to direct current (DC-DC) converter can include a chip embedded integrated circuit (IC), one or more switches, and an inductor. The IC can be embedded in a PCB. The IC can include driver, switches, and PWM controller. The IC and/or switches can include eGaN. The inductor can be stacked above the IC and/or switches, reducing an overall footprint. One or more capacitors can also be stacked above the IC and/or switches. Vias can couple the inductor and/or capacitors to the IC (e.g., to the switches). The DC-DC converter can offer better transient performance, have lower ripples, or use fewer capacitors. Parasitic effects that prevent efficient, higher switching speeds are reduced. The inductor size and overall footprint can be reduced. Multiple inductor arrangements can improve performance. Various feedback systems can be used, such as a ripple generator in a constant on or off time modulation circuit.Type: GrantFiled: February 8, 2017Date of Patent: August 8, 2017Assignee: Faraday Semi, LLCInventor: Parviz Parto
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Patent number: 9653996Abstract: In one implementation, a voltage converter includes a high side power switch, and first and second low side power switches. The voltage converter also includes a driver stage for driving the high side power switch and the first and second low side power switches, and an adaptive OFF-time control circuit coupled to the driver stage. The adaptive OFF-time control circuit is configured to sense a current through one of the first and second low side switches, and to determine an adaptive off time for the high side power switch based on the sensed current.Type: GrantFiled: September 9, 2014Date of Patent: May 16, 2017Assignee: Infineon Technologies Americas Corp.Inventors: Parviz Parto, Amir M. Rahimi
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Patent number: 9588532Abstract: According to an exemplary implementation, a voltage regulator includes an emulated ripple generator. The emulated ripple generator includes a high side switch configured to control charging of an emulated ripple. The emulated ripple generator further includes a low side switch configured to control discharging of the emulated ripple. The high side switch and the low side switch are configured to control the charging and the discharging such that the emulated ripple is substantially in-phase with an inductor current of the voltage regulator. The high side switch can be configured to control the charging by selectively enabling a high side current source. Furthermore, the low side switch can be configured to control the discharging by selectively enabling a low side current source.Type: GrantFiled: January 21, 2013Date of Patent: March 7, 2017Assignee: Infineon Technologies Americas Corp.Inventors: Amir M. Rahimi, Parviz Parto, Peyman Asadi
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Patent number: 9577522Abstract: A hybrid power supply circuit includes a digital circuit, a digital-to-analog converter circuit, and an analog compensator circuit (analog control circuit). According to one configuration, the digital circuit includes a digital pre-filter that substantially matches settings of analog filter circuitry present in the analog compensator circuit. During operation, the digital circuit receives control input indicating how to control a magnitude of an output voltage produced by the power supply circuit. The digital circuit passes the received through the digital pre-filter to produce a (filtered) digital reference voltage. The digital-to-analog converter circuit converts the received digital reference voltage into an analog reference voltage (a filtered rendition of the received control input). The analog compensator circuit receives and uses the digitally pre-filtered analog reference voltage as a basis to control the magnitude of the output voltage produced by the power supply circuit.Type: GrantFiled: March 4, 2015Date of Patent: February 21, 2017Assignee: Infineon Technologies Americas Corp.Inventors: Saurabh Jayawant, Venkat Sreenivas, Parviz Parto, Robert T. Carroll
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Patent number: 9502980Abstract: In one implementation, a circuit for producing an average output inductor current indicator in a voltage converter is configured to start a counter when a high side power switch turns on, to sense a sample current through an output inductor of the voltage converter after the high side power switch turns off and when a low side power switch is on, and to register a first count of the counter when the low side power switch turns off. The circuit is further configured to register a second count of the counter when the high side power switch subsequently turns on, and to produce the average output inductor current indicator based on the sample current and the first and second counts of the counter.Type: GrantFiled: November 19, 2014Date of Patent: November 22, 2016Assignee: Infineon Technologies Americas Corp.Inventors: Amir M. Rahimi, Parviz Parto, Saurabh Jayawant
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Publication number: 20160261182Abstract: A hybrid power supply circuit includes a digital circuit, a digital-to-analog converter circuit, and an analog compensator circuit (analog control circuit). According to one configuration, the digital circuit includes a digital pre-filter that substantially matches settings of analog filter circuitry present in the analog compensator circuit. During operation, the digital circuit receives control input indicating how to control a magnitude of an output voltage produced by the power supply circuit. The digital circuit passes the received through the digital pre-filter to produce a (filtered) digital reference voltage. The digital-to-analog converter circuit converts the received digital reference voltage into an analog reference voltage (a filtered rendition of the received control input). The analog compensator circuit receives and uses the digitally pre-filtered analog reference voltage as a basis to control the magnitude of the output voltage produced by the power supply circuit.Type: ApplicationFiled: March 4, 2015Publication date: September 8, 2016Inventors: Saurabh Jayawant, Venkat Sreenivas, Parviz Parto, Robert T. Carroll
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Patent number: 9437570Abstract: In one implementation, a power semiconductor package includes a conductive carrier including a switch node segment and a power output segment. The power semiconductor package also includes an integrated output inductor stacked over the conductive carrier and configured to couple the switch node segment to the power output segment. The power semiconductor package further includes a power stage stacked over the integrated output inductor.Type: GrantFiled: November 11, 2014Date of Patent: September 6, 2016Assignee: Infineon Technologies Americas CorpInventors: Eung San Cho, Kevin Moody, Parviz Parto
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Patent number: 9190383Abstract: In one implementation, a power semiconductor package includes a conductive carrier including a switch node segment and a power output segment. The power semiconductor package also includes an integrated output inductor stacked over the conductive carrier and configured to couple the switch node segment to the power output segment. The power semiconductor package further includes a power stage stacked over the integrated output inductor, the power stage including a pulse-width modulation (PWM) control and driver coupled to a control transistor and a sync transistor.Type: GrantFiled: April 23, 2015Date of Patent: November 17, 2015Assignee: Infineon Technologies Americas Corp.Inventors: Eung San Cho, Kevin Moody, Parviz Parto
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Publication number: 20150228610Abstract: In one implementation, a power semiconductor package includes a conductive carrier including a switch node segment and a power output segment. The power semiconductor package also includes an integrated output inductor stacked over the conductive carrier and configured to couple the switch node segment to the power output segment. The power semiconductor package further includes a power stage stacked over the integrated output inductor, the power stage including a pulse-width modulation (PWM) control and driver coupled to a control transistor and a sync transistor.Type: ApplicationFiled: April 23, 2015Publication date: August 13, 2015Inventors: Eung San Cho, Kevin Moody, Parviz Parto
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Publication number: 20150162297Abstract: In one implementation, a power semiconductor package includes a conductive carrier including a switch node segment and a power output segment. The power semiconductor package also includes an integrated output inductor stacked over the conductive carrier and configured to couple the switch node segment to the power output segment. The power semiconductor package further includes a power stage stacked over the integrated output inductor.Type: ApplicationFiled: November 11, 2014Publication date: June 11, 2015Inventors: Eung San Cho, Kevin Moody, Parviz Parto
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Patent number: 9035624Abstract: According to one configuration, a power supply circuit includes an inductor, a monitor circuit, a storage resource, and a processor circuit. The inductor resides in a phase of the power supply and conveys current to a load. The monitor circuit monitors and samples the voltage of a node in the power supply. The voltage of the node may be a sawtooth or ramp waveform sampled by the monitor circuit. A magnitude of the voltage at the node varies depending on an amount of current passing through the inductor to the load. The monitor circuit initiates storage of at least one sample in a storage resource. A processor circuit utilizes the multiple sample voltages stored in the storage resource to produce a value indicative of the amount of average current conveyed through the inductor to the load.Type: GrantFiled: December 27, 2011Date of Patent: May 19, 2015Assignee: International Rectifier CorporationInventors: Amir M. Rahimi, Parviz Parto
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Publication number: 20150115911Abstract: In one implementation, a voltage converter includes a high side power switch, and first and second low side power switches. The voltage converter also includes a driver stage for driving the high side power switch and the first and second low side power switches, and an adaptive OFF-time control circuit coupled to the driver stage. The adaptive OFF-time control circuit is configured to sense a current through one of the first and second low side switches, and to determine an adaptive off time for the high side power switch based on the sensed current.Type: ApplicationFiled: September 9, 2014Publication date: April 30, 2015Inventors: Parviz Parto, Amir M. Rahimi
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Publication number: 20150077074Abstract: In one implementation, a circuit for producing an average output inductor current indicator in a voltage converter is configured to start a counter when a high side power switch turns on, to sense a sample current through an output inductor of the voltage converter after the high side power switch turns off and when a low side power switch is on, and to register a first count of the counter when the low side power switch turns off. The circuit is further configured to register a second count of the counter when the high side power switch subsequently turns on, and to produce the average output inductor current indicator based on the sample current and the first and second counts of the counter.Type: ApplicationFiled: November 19, 2014Publication date: March 19, 2015Inventors: Amir M. Rahimi, Parviz Parto, Saurabh Jayawant
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Synchronous buck converter including multi-mode control for light load efficiency and related method
Patent number: 8912773Abstract: According to one embodiment, a synchronous buck converter comprises a multi-mode control circuit for detecting a load condition of a variable load, an output stage driven by the multi-mode control circuit, wherein the variable load is coupled to the output stage, and a feedback circuit connected between the output stage and the multi-mode control circuit. The multi-mode control circuit is configured to adjust a current provided by the output stage to the variable load based on the load condition. In one embodiment, the multi-mode control circuit selectably uses one of at least a first control mode and a second control mode according to the load condition, wherein the first control mode is a pulse-width modulation (PWM) mode selected for switching efficiency when the load condition is heavy and the second control mode is an adaptive ON-time (AOT) mode selected for switching efficiency when the load condition is light.Type: GrantFiled: May 19, 2011Date of Patent: December 16, 2014Assignee: International Rectifier CorporationInventors: Parviz Parto, Seungbeom Kevin Kim, Amir M. Rahimi, Suresh Kariyadan -
Publication number: 20130249508Abstract: According to an exemplary implementation, a voltage regulator includes an emulated ripple generator. The emulated ripple generator includes a high side switch configured to control charging of an emulated ripple. The emulated ripple generator further includes a low side switch configured to control discharging of the emulated ripple. The high side switch and the low side switch are configured to control the charging and the discharging such that the emulated ripple is substantially in-phase with an inductor current of the voltage regulator. The high side switch can be configured to control the charging by selectively enabling a high side current source. Furthermore, the low side switch can be configured to control the discharging by selectively enabling a low side current source.Type: ApplicationFiled: January 21, 2013Publication date: September 26, 2013Applicant: International Rectifier CorporationInventors: Amir M. Rahimi, Parviz Parto, Peyman Asadi
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Synchronous Buck Converter Including Multi-Mode Control for Light Load Efficiency and Related Method
Publication number: 20120187928Abstract: According to one embodiment, a synchronous buck converter comprises a multi-mode control circuit for detecting a load condition of a variable load, an output stage driven by the multi-mode control circuit, wherein the variable load is coupled to the output stage, and a feedback circuit connected between the output stage and the multi-mode control circuit. The multi-mode control circuit is configured to adjust a current provided by the output stage to the variable load based on the load condition. In one embodiment, the multi-mode control circuit selectably uses one of at least a first control mode and a second control mode according to the load condition, wherein the first control mode is a pulse-width modulation (PWM) mode selected for switching efficiency when the load condition is heavy and the second control mode is an adaptive ON-time (AOT) mode selected for switching efficiency when the load condition is light.Type: ApplicationFiled: May 19, 2011Publication date: July 26, 2012Applicant: INTERNATIONAL RECTIFIER CORPORATIONInventors: Parviz Parto, Seungbeom Kevin Kim, Amir M. Rahimi, Suresh Kariyadan