Patents by Inventor Julie Lynn Stultz

Julie Lynn Stultz 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).

  • Patent number: 10142751
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: November 27, 2018
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 10097084
    Abstract: Systems and methods are disclosed, including, for example, a low-voltage control circuit configured to receive a charge pump voltage, a rail voltage, and a switch control signal, to provide the charge pump voltage when the switch control signal is in a first state, and to provide the higher of the charge pump voltage and the rail voltage when the switch control signal is in a second state. The system can include a first pick-high circuit configured to receive the rail voltage and the charge pump voltage, and to provide the higher of the rail voltage and the charge pump voltage at an output. The switch control signal, in the first state, can include the output of the pick-high circuit. Methods of forming such apparatus are disclosed, as well as methods of operation, and other embodiments.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: October 9, 2018
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Kenneth P. Snowdon, Julie Lynn Stultz
  • Publication number: 20180184221
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Application
    Filed: March 22, 2017
    Publication date: June 28, 2018
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 9838004
    Abstract: Systems and methods are disclosed, including a protection multiplexer circuit configured to receive a control signal and a reference voltage, to provide the reference voltage at an output when the control signal is in a first state, and to isolate the reference voltage from the output when the control signal is in a second state. The protection multiplexer circuit includes cascaded first and second transistors, wherein the first transistor is a native transistor. Control inputs of the first and second transistors are configured to receive the control signal, a first terminal of the first transistor is configured to receive the reference voltage, and the first terminal of the second transistor is coupled to the output. Methods of operation are disclosed, and other embodiments.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 5, 2017
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Kenneth P. Snowdon, Julie Lynn Stultz
  • Publication number: 20170201843
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Application
    Filed: March 22, 2017
    Publication date: July 13, 2017
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 9635453
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: April 25, 2017
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 9591421
    Abstract: This document discusses, among other things, a detection system configured to identify a type of a pole of a four-pole audio jack using first and second comparators. The detection system can include a bias circuit configured to bias a detection input coupled to the pole, and first and second comparators configured to compare the detection input to respective first and second thresholds to provide an indication of the type of the pole.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: March 7, 2017
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Seth M. Prentice, Julie Lynn Stultz, Yongliang Li, Graham L S Connolly, Shawn Barden
  • Publication number: 20160285446
    Abstract: Systems and methods are disclosed, including a protection multiplexer circuit configured to receive a control signal and a reference voltage, to provide the reference voltage at an output when the control signal is in a first state, and to isolate the reference voltage from the output when the control signal is in a second state. The protection multiplexer circuit includes cascaded first and second transistors, wherein the first transistor is a native transistor. Control inputs of the first and second transistors are configured to receive the control signal, a first terminal of the first transistor is configured to receive the reference voltage, and the first terminal of the second transistor is coupled to the output. Methods of operation are disclosed, and other embodiments.
    Type: Application
    Filed: March 24, 2016
    Publication date: September 29, 2016
    Inventors: Kenneth P. Snowdon, Julie Lynn Stultz
  • Publication number: 20160204696
    Abstract: Systems and methods are disclosed, including, for example, a low-voltage control circuit configured to receive a charge pump voltage, a rail voltage, and a switch control signal, to provide the charge pump voltage when the switch control signal is in a first state, and to provide the higher of the charge pump voltage and the rail voltage when the switch control signal is in a second state. The system can include a first pick-high circuit configured to receive the rail voltage and the charge pump voltage, and to provide the higher of the rail voltage and the charge pump voltage at an output. The switch control signal, in the first state, can include the output of the pick-high circuit. Methods of forming such apparatus are disclosed, as well as methods of operation, and other embodiments.
    Type: Application
    Filed: March 24, 2016
    Publication date: July 14, 2016
    Inventors: Kenneth P. Snowdon, Julie Lynn Stultz
  • Patent number: 9294080
    Abstract: An apparatus comprises at least one transistor configured as analog switch, a well biasing circuit configured to provide a dynamic electrical bias to a bulk region of the at least one transistor, and a comparator circuit in electrical communication with the well biasing circuit and the transistor. The comparator circuit is configured to detect a first operating condition of the transistor and a second operating condition of the transistor. The well biasing circuit is configured to apply a first electrical bias to the bulk region of a transistor when the first operating condition is detected and apply a second electrical bias to the bulk region of the transistor when the second operating condition is detected, and wherein the comparator is configured to apply hysteresis to detection of the first and second operating conditions.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: March 22, 2016
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Tyler Daigle, Julie Lynn Stultz
  • Patent number: 9263431
    Abstract: In certain examples an integrated circuit protection circuit can include a circuit module, and an isolation device. The isolation device can be configured to couple a ground node of the circuit module to a power ground in an on state, and to isolate the ground node of the circuit module from the power ground in an off state, wherein the isolation module is configured to enter the off state when the IC receives a negative input voltage.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: February 16, 2016
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Sam Zheng, Gary Sun, Steven M. Leibiger, Tyler Daigle, Julie Lynn Stultz
  • Patent number: 9246445
    Abstract: An apparatus comprises a first audio amplifier circuit configured to provide an analog audio signal and an analog switch circuit including a first input configured to receive the analog audio signal, a second input configured to receive a first digital data signal, and a first output configured to provide one of the digital data signal or the analog audio signal. The apparatus also includes a first feedback circuit coupled to the first audio amplifier circuit and the analog switch circuit output, the feedback circuit configured to bias the first audio amplifier circuit.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: January 26, 2016
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Julie Lynn Stultz, Earl Schreyer
  • Publication number: 20150222982
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Application
    Filed: April 17, 2015
    Publication date: August 6, 2015
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 9059692
    Abstract: An apparatus comprises an input to receive a voltage, a threshold voltage circuit, a comparison circuit, and an output. The threshold voltage circuit provides an adjustable first threshold voltage at a first output and an adjustable second threshold voltage at a second output. The comparison circuit determines when the input voltage is greater than the first voltage threshold, including when the first voltage threshold is adjusted substantially up to a high supply voltage rail, and determines when the input voltage is less than the second voltage threshold, including when the second voltage threshold is adjusted substantially down to a low supply voltage rail. The output provides a first indication when the input voltage is greater than the first voltage threshold and to provide a second indication when the input voltage is less than the second voltage threshold.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: June 16, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Tyler Daigle, Julie Lynn Stultz
  • Patent number: 9014388
    Abstract: This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. In an example, the accessory detection device can include a comparator and a switch. The comparator can be configured to receive mobile device accessory information from the mobile device accessory and to determine activation of the send/end key using the received mobile device accessory information. The switch can be configured to receive connection information indicative of mobile device accessory connection to the audio jack and to isolate a reference input of the comparator from a supply voltage using the connection information, for example, to reduce leakage current.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: April 21, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Seth M. Prentice, Julie Lynn Stultz
  • Patent number: 8947156
    Abstract: This application discusses, among other things, apparatus and methods for driving the bulk of a high-voltage transistor using transistors having gates with low-voltage ratings. In an example, a bulk driver can include an output configured to couple to bulk of a high-voltage transistor, a pick circuit configured to couple the output to an input voltage at an input terminal of the high-voltage transistor or an output voltage at the output terminal of the high-voltage transistor when the high-voltage transistor is in a high impedance state, and a bypass circuit configured to couple the output of the bulk driver to the output voltage when the high-voltage transistor is in a low impedance state.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: February 3, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Julie Lynn Stultz, Tyler Daigle
  • Patent number: 8934642
    Abstract: A switch can be configured to receive a first signal at a first input and provide an output signal at an output, depending on a state of the switch. A switch state change can be delayed until an indication of a requested switch state different than a current switch state is received and the first signal reaches a threshold.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: January 13, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Julie Lynn Stultz, Steven Macaluso, Enrique O. Rodriguez
  • Publication number: 20140323184
    Abstract: An apparatus comprises at least one transistor configured as analog switch, a well biasing circuit configured to provide a dynamic electrical bias to a bulk region of the at least one transistor, and a comparator circuit in electrical communication with the well biasing circuit and the transistor. The comparator circuit is configured to detect a first operating condition of the transistor and a second operating condition of the transistor. The well biasing circuit is configured to apply a first electrical bias to the bulk region of a transistor when the first operating condition is detected and apply a second electrical bias to the bulk region of the transistor when the second operating condition is detected, and wherein the comparator is configured to apply hysteresis to detection of the first and second operating conditions.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 30, 2014
    Applicant: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Tyler Daigle, Julie Lynn Stultz
  • Patent number: 8779962
    Abstract: This document discusses, among other things, apparatus and methods including an analog-to-digital controller (ADC) configured to receive an enable signal and to provide an ADC output signal to control logic, wherein the control logic is configured to provide a control voltage to a control input of a switch. In an example, the control voltage includes the ADC output signal when the ADC output signal is below a first threshold or above a second threshold. In certain examples, the control logic is configured to transition the control voltage from the first threshold to the second threshold when the ADC output signal is between the first and second thresholds.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: July 15, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventors: John L. Carpentier, Julie Lynn Stultz, Steven Macaluso
  • Publication number: 20140177876
    Abstract: An apparatus comprises a first audio amplifier circuit configured to provide an analog audio signal and an analog switch circuit including a first input configured to receive the analog audio signal, a second input configured to receive a first digital data signal, and a first output configured to provide one of the digital data signal or the analog audio signal. The apparatus also includes a first feedback circuit coupled to the first audio amplifier circuit and the analog switch circuit output, the feedback circuit configured to bias the first audio amplifier circuit.
    Type: Application
    Filed: February 26, 2014
    Publication date: June 26, 2014
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Julie Lynn Stultz, Earl Schreyer