Patents by Inventor Ahmad Ashrafzadeh

Ahmad Ashrafzadeh 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).

  • Publication number: 20240142538
    Abstract: A method for measuring electrical quantities in an electrical system includes obtaining a first set of known electrical outputs of an electrical quantity sensor at a first temperature. The method also includes obtaining a second set of known electrical outputs of the electrical quantity sensor at a second temperature that is different from the first temperature. The method further includes measuring an operational temperature of one or more locations in the electrical system. The method still further includes computing a pair of reference electrical output values corresponding to the measured operational temperature in accordance with the first set of known electrical outputs at the first temperature and the second set of known electrical outputs at the second temperature.
    Type: Application
    Filed: January 8, 2024
    Publication date: May 2, 2024
    Inventor: Ahmad Ashrafzadeh
  • Patent number: 11906597
    Abstract: A resistor ladder comprising identical resistors is disposed electrically in parallel with a multicell battery to calibrate voltage-controlled oscillators or analog-to-digital convertors for voltage balancing the battery cells in the multicell battery. Switches in a first state provide the voltage across each resistor as inputs to the VCOs or ADCs. The number of oscillations of the output signal of each VCO or ADC over a predetermined time period are compared to determine an offset error. Switches in a second state provide the voltage across each battery cell as inputs to the VCOs or ADCs. The battery cells with a higher relative voltage can be discharged until they are balanced. Some aspects describe temperature-adjusted and interpolated determinations of electrical quantities in the cells such as voltage and/or current.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: February 20, 2024
    Assignee: NOVA SEMICONDUCTOR, INC.
    Inventor: Ahmad Ashrafzadeh
  • Publication number: 20210151834
    Abstract: A resistor ladder comprising identical resistors is disposed electrically in parallel with a multicell battery to calibrate voltage-controlled oscillators or analog-to-digital convertors for voltage balancing the battery cells in the multicell battery. Switches in a first state provide the voltage across each resistor as inputs to the VCOs or ADCs. The number of oscillations of the output signal of each VCO or ADC over a predetermined time period are compared to determine an offset error. Switches in a second state provide the voltage across each battery cell as inputs to the VCOs or ADCs. The battery cells with a higher relative voltage can be discharged until they are balanced. Some aspects describe temperature-adjusted and interpolated determinations of electrical quantities in the cells such as voltage and/or current.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Inventor: Ahmad ASHRAFZADEH
  • Patent number: 10964928
    Abstract: A resistor ladder comprising identical resistors is disposed electrically in parallel with a multicell battery to calibrate voltage-controlled oscillators or analog-to-digital converters for voltage balancing the battery cells in the multicell battery. Switches in a first state provide the voltage across each resistor as inputs to the VCOs or ADCs. The number of oscillations of the output signal of each VCO or ADC over a predetermined time period are compared to determine an offset error. Switches in a second state provide the voltage across each battery cell as inputs to the VCOs or ADCs. The battery cells with a higher relative voltage can be discharged until they are balanced. Some aspects describe temperature-adjusted and interpolated determinations of electrical quantities in the cells such as voltage and/or current.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: March 30, 2021
    Assignee: Nova Semiconductor, Inc.
    Inventor: Ahmad Ashrafzadeh
  • Patent number: 10446498
    Abstract: In some general aspects, an apparatus may include a first semiconductor die, a second semiconductor die, and a capacitive isolation circuit being coupled to the first semiconductor die and the second semiconductor die. The capacitive isolation circuit may be disposed outside of the first semiconductor die and the second semiconductor die. The first semiconductor die, the second semiconductor die, and the capacitive circuit may be included in a molding of a semiconductor package.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: October 15, 2019
    Assignee: Fairchild Semiconductor Corporation
    Inventors: John Constantino, Timwah Luk, Ahmad Ashrafzadeh, Robert L. Krause, Etan Shacham, Maria Clemens Ypil Quinones, Janusz Bryzek, Chung-Lin Wu
  • Patent number: 10304758
    Abstract: Techniques for forming a wafer level package device are disclosed. In one or more embodiments, the techniques include forming a wafer level lead frame on a carrier wafer and electrically connecting the wafer level lead frame to an active semiconductor wafer. The carrier wafer and the active semiconductor wafer have at least substantially the same coefficients of thermal expansion. The carrier wafer can be removed from the wafer level package device, and a number of connectors can be formed on the wafer level package device. The wafer level package device can be singulated to form chip packages, such as DFN or QFN packages.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 28, 2019
    Assignee: MAXIM INTEGRATED PRODUCTS, INC
    Inventors: Karthik Thambidurai, Ahmad Ashrafzadeh, Viresh P. Patel, Viren Khandekar
  • Publication number: 20190148701
    Abstract: A resistor ladder comprising identical resistors is disposed electrically in parallel with a multicell battery to calibrate voltage-controlled oscillators or analog-to-digital convertors for voltage balancing the battery cells in the multicell battery. Switches in a first state provide the voltage across each resistor as inputs to the VCOs or ADCs. The number of oscillations of the output signal of each VCO or ADC over a predetermined time period are compared to determine an offset error. Switches in a second state provide the voltage across each battery cell as inputs to the VCOs or ADCs. The battery cells with a higher relative voltage can be discharged until they are balanced. Some aspects describe temperature-adjusted and interpolated determinations of electrical quantities in the cells such as voltage and/or current.
    Type: Application
    Filed: November 2, 2018
    Publication date: May 16, 2019
    Inventor: Ahmad Ashrafzadeh
  • Publication number: 20170373008
    Abstract: In some general aspects, an apparatus may include a first semiconductor die, a second semiconductor die, and a capacitive isolation circuit being coupled to the first semiconductor die and the second semiconductor die. The capacitive isolation circuit may be disposed outside of the first semiconductor die and the second semiconductor die. The first semiconductor die, the second semiconductor die, and the capacitive circuit may be included in a molding of a semiconductor package.
    Type: Application
    Filed: August 14, 2017
    Publication date: December 28, 2017
    Applicant: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: John CONSTANTINO, Timwah LUK, Ahmad ASHRAFZADEH, Robert L. KRAUSE, Etan SHACHAM, Maria Clemens Ypil QUINONES, Janusz BRYZEK, Chung-Lin WU
  • Patent number: 9735112
    Abstract: In some general aspects, an apparatus may include a first semiconductor die, a second semiconductor die, and a capacitive isolation circuit being coupled to the first semiconductor die and the second semiconductor die. The capacitive isolation circuit may be disposed outside of the first semiconductor die and the second semiconductor die. The first semiconductor die, the second semiconductor die, and the capacitive circuit may be included in a molding of a semiconductor package.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: August 15, 2017
    Assignee: Fairchild Semiconductor Corporation
    Inventors: John Constantino, Timwah Luk, Ahmad Ashrafzadeh, Robert L. Krause, Etan Shacham, Maria Clemens Ypil Quinones, Janusz Bryzek, Chung-Lin Wu
  • Patent number: 9472451
    Abstract: Semiconductor package device, such as wafer-level package semiconductor devices, are described that have pillars for providing electrical interconnectivity. In an implementation, the wafer-level package devices include an integrated circuit chip having at least one pillar formed over the integrated circuit chip. The pillar is configured to provide electrical interconnectivity with the integrated circuit chip. The wafer-level package device also includes an encapsulation structure configured to support the pillar.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: October 18, 2016
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Viren Khandekar, Karthik Thambidurai, Ahmad Ashrafzadeh, Amit S. Kelkar, Hien D. Nguyen
  • Publication number: 20150200162
    Abstract: In some general aspects, an apparatus may include a first semiconductor die, a second semiconductor die, and a capacitive isolation circuit being coupled to the first semiconductor die and the second semiconductor die. The capacitive isolation circuit may be disposed outside of the first semiconductor die and the second semiconductor die. The first semiconductor die, the second semiconductor die, and the capacitive circuit may be included in a molding of a semiconductor package.
    Type: Application
    Filed: January 9, 2015
    Publication date: July 16, 2015
    Inventors: John CONSTANTINO, Timwah LUK, Ahmad ASHRAFZADEH, Robert L. KRAUSE, Etan SHACHAM, Maria Clemens Ypil QUINONES, Janusz BRYZEK, Chung-Lin WU
  • Publication number: 20150028475
    Abstract: Semiconductor package device, such as wafer-level package semiconductor devices, are described that have pillars for providing electrical interconnectivity. In an implementation, the wafer-level package devices include an integrated circuit chip having at least one pillar formed over the integrated circuit chip. The pillar is configured to provide electrical interconnectivity with the integrated circuit chip. The wafer-level package device also includes an encapsulation structure configured to support the pillar.
    Type: Application
    Filed: October 13, 2014
    Publication date: January 29, 2015
    Inventors: Viren Khandekar, Karthik Thambidurai, Ahmad Ashrafzadeh, Amit S. Kelkar, Hien D. Nguyen
  • Publication number: 20140312458
    Abstract: In one general aspect, a method can include forming a redistribution layer on a substrate using a first electroplating process, and forming a conductive pillar on the redistribution layer using a second electroplating process. The method can include coupling a semiconductor die to the redistribution layer, and can include forming a molding layer encapsulating at least a portion of the redistribution layer and at least a portion of the conductive pillar.
    Type: Application
    Filed: November 27, 2013
    Publication date: October 23, 2014
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Ahmad ASHRAFZADEH, Vijay ULLAL, Justin CHIANG, Daniel KINZER, Michael M. DUBE, Oseob JEON, Chung-Lin WU, Maria Cristina ESTACIO
  • Patent number: 8860222
    Abstract: Semiconductor package device, such as wafer-level package semiconductor devices, are described that have pillars for providing electrical interconnectivity. In an implementation, the wafer-level package devices include an integrated circuit chip having at least one pillar formed over the integrated circuit chip. The pillar is configured to provide electrical interconnectivity with the integrated circuit chip. The wafer-level package device also includes an encapsulation structure configured to support the pillar.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 14, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Viren Khandekar, Karthik Thambidurai, Ahmad Ashrafzadeh, Amit Kelkar, Hien D. Nguyen
  • Patent number: 8629499
    Abstract: A MOSFET power chip includes a first vertical MOSFET and a second vertical MOSFET. The first vertical MOSFET includes a semiconductor body having a first surface defining a source and a second surface defining a drain and a gate structure formed in the semiconductor body near the second surface. A via is formed within the semiconductor body and is substantially perpendicular to the first surface and the second surface. The via has a first end electrically coupled to the first surface and a second end electrically coupled to the gate structure. The second vertical MOSFET includes a semiconductor body having a first surface defining a source, a second surface defining a drain and a gate structure formed in the semiconductor body near the first surface.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: January 14, 2014
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Ahmad Ashrafzadeh
  • Publication number: 20120292691
    Abstract: A MOSFET power chip includes a first vertical MOSFET and a second vertical MOSFET. The first vertical MOSFET includes a semiconductor body having a first surface defining a source and a second surface defining a drain and a gate structure formed in the semiconductor body near the second surface. A via is formed within the semiconductor body and is substantially perpendicular to the first surface and the second surface. The via has a first end electrically coupled to the first surface and a second end electrically coupled to the gate structure. The second vertical MOSFET includes a semiconductor body having a first surface defining a source, a second surface defining a drain and a gate structure formed in the semiconductor body near the first surface.
    Type: Application
    Filed: May 28, 2012
    Publication date: November 22, 2012
    Inventor: Ahmad Ashrafzadeh
  • Patent number: 8188541
    Abstract: In an embodiment, set forth by way of example and not limitation, a MOSFET power chip includes a first vertical MOSFET and a second vertical MOSFET. The first vertical MOSFET includes a semiconductor body having a first surface defining a source and a second surface defining a drain and a gate structure formed in the semiconductor body near the second surface. A via is formed within the semiconductor body and is substantially perpendicular to the first surface and the second surface. The via has a first end electrically coupled to the first surface and a second end electrically coupled to the gate structure. The second vertical MOSFET includes a semiconductor body having a first surface defining a source, a second surface defining a drain and a gate structure formed in the semiconductor body near the first surface.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 29, 2012
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Ahmad Ashrafzadeh
  • Publication number: 20110227153
    Abstract: In an embodiment, set forth by way of example and not limitation, a MOSFET power chip includes a first vertical MOSFET and a second vertical MOSFET. The first vertical MOSFET includes a semiconductor body having a first surface defining a source and a second surface defining a drain and a gate structure formed in the semiconductor body near the second surface. A via is formed within the semiconductor body and is substantially perpendicular to the first surface and the second surface. The via has a first end electrically coupled to the first surface and a second end electrically coupled to the gate structure. The second vertical MOSFET includes a semiconductor body having a first surface defining a source, a second surface defining a drain and a gate structure formed in the semiconductor body near the first surface.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 22, 2011
    Applicant: Maxim Integrated Products, Inc.
    Inventor: Ahmad Ashrafzadeh
  • Patent number: 7969002
    Abstract: Integrated circuit packages incorporating an inductor and methods for their fabrication. The lead frame used in packaging the integrated circuit includes a first area for receiving the integrated circuit, and a second area having a plurality of connections from one side to the other side of the lead frame, thereby forming coil segments. After mounting the integrated circuit and wire bonding its connections, the lead frame is placed on a ferrite plate, the assembly is encapsulated in resin, and the leads trimmed and bent. Mounting of the packaged integrated circuit on a properly prepared printed circuit interconnects the coil segments in the package to coil segments on the printed circuit, thereby forming a single, multi-turn coil around the ferrite plate. Various embodiments are disclosed.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 28, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Ahmad Ashrafzadeh, Mansour Izadinia, Nitin Kalje, Ignacio McQuirk
  • Patent number: 7910992
    Abstract: In an embodiment, set forth by way of example and not limitation, a MOSFET power chip includes a first vertical MOSFET and a second vertical MOSFET. The first vertical MOSFET includes a semiconductor body having a first surface defining a source and a second surface defining a drain and a gate structure formed in the semiconductor body near the second surface. A via is formed within the semiconductor body and is substantially perpendicular to the first surface and the second surface. The via has a first end electrically coupled to the first surface and a second end electrically coupled to the gate structure. The second vertical MOSFET includes a semiconductor body having a first surface defining a source, a second surface defining a drain and a gate structure formed in the semiconductor body near the first surface.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: March 22, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Ahmad Ashrafzadeh