Patents by Inventor Eric I. Mikuteit
Eric I. Mikuteit 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: 9797959Abstract: A circuit comprises a battery field-effect transistor (FET) coupled between a battery and an electronic system so that current from the battery flows through the battery FET to the electronic system. A replica FET couples the battery to a current sensing circuit. One of the battery FET and the replica FET comprises a plurality of parallel FET segments having separate control terminals. A logic block provides a plurality of switch control signals based on a system state input. A switching circuit receives the switch control signals and selectively couples the separate control terminals of the FET segments to one of a first reference voltage terminal or a second reference voltage terminal to independently turn each FET segment on or off. The current sensing circuit provides a voltage indicative of the current flowing through the replica FET.Type: GrantFiled: November 19, 2013Date of Patent: October 24, 2017Assignee: QUALCOMM IncorporatedInventor: Eric I Mikuteit
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Patent number: 9651624Abstract: The present disclosure includes systems and methods for state of charge estimation. In one embodiment, the present disclosure includes a method comprising receiving a voltage corresponding to a state of charge of a battery, converting the voltage to an estimated state of charge using different algorithms across different ranges. In another embodiment, an offset state of charge is applied to a first state of charge to produce an estimated state of charge.Type: GrantFiled: March 13, 2013Date of Patent: May 16, 2017Inventors: Krishnakumar Gopalakrishnan, Eric I Mikuteit
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Patent number: 9190862Abstract: Exemplary embodiments are directed to systems, devices, methods, and computer-readable media for calibrating a charging current. A device may include a charger for conveying an output voltage to a chargeable device. The device may also include a monitoring system including an analog-to-digital converter for measuring a current received by the chargeable device. Further, the device may include a control device configured to receive a charging current value from the monitoring system and convey a signal to the charger in response to a comparison of the charging current value to a target current value.Type: GrantFiled: March 5, 2013Date of Patent: November 17, 2015Assignee: QUALCOMM IncorporatedInventors: Cheong Kun, Eric B Zeisel, David Keitel, Eric I Mikuteit, Abhijeet V Dharmapurikar, Todd R Sutton
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Publication number: 20150137820Abstract: A circuit comprises a battery field-effect transistor (FET) coupled between a battery and an electronic system so that current from the battery flows through the battery FET to the electronic system. A replica FET couples the battery to a current sensing circuit. One of the battery FET and the replica FET comprises a plurality of parallel FET segments having separate control terminals. A logic block provides a plurality of switch control signals based on a system state input. A switching circuit receives the switch control signals and selectively couples the separate control terminals of the FET segments to one of a first reference voltage terminal or a second reference voltage terminal to independently turn each FET segment on or off. The current sensing circuit provides a voltage indicative of the current flowing through the replica FET.Type: ApplicationFiled: November 19, 2013Publication date: May 21, 2015Applicant: QUALCOMM IncorporatedInventor: Eric I. Mikuteit
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Patent number: 9000750Abstract: A method and apparatus for providing a temperature sensing loop used in connection with a current sensing component, such as a BATFET, in order to compensate for variations in the BATFET's resistance due to temperature variations. The temperature sensing loop detects a temperature of the BATFET and regulates the gate voltage of the BATFET based on the detected temperature in order to compensate for changes in the BATFET's resistance. The temperature sensing feedback loop maintains the BATFET at a constant resistance for current sensing through negative feedback control. The BATFET and temperature sensing loop can be provided as components of an on-chip fuel gauging application for a UE.Type: GrantFiled: July 25, 2012Date of Patent: April 7, 2015Assignee: QUALCOMM IncorporatedInventors: Baiying Yu, Nihit Bajaj, Troy Stockstad, Eric I. Mikuteit
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Publication number: 20150046105Abstract: In one embodiment, a circuit comprises a sensor providing a digital signal responsive to a battery voltage on a battery terminal of a battery. The sensor can be an analog-to-digital convertor. A processor is coupled to the sensor and is configured to calculate a state of charge of the battery based on the digital signal at a first time, the digital signal at a second time, and a stored battery profile of open circuit voltage as a function of state of charge at the second time.Type: ApplicationFiled: April 15, 2014Publication date: February 12, 2015Applicant: QUALCOMM IncorporatedInventors: Ranjit Kumar Guntreddi, Krishnakumar Gopalakrishnan, Justin T Blackman, Eric I Mikuteit, Todd R Sutton
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Publication number: 20140172333Abstract: The present disclosure includes systems and methods for state of charge estimation. In one embodiment, the present disclosure includes a method comprising receiving a voltage corresponding to a state of charge of a battery, converting the voltage to an estimated state of charge using different algorithms across different ranges. In another embodiment, an offset state of charge is applied to a first state of charge to produce an estimated state of charge.Type: ApplicationFiled: March 13, 2013Publication date: June 19, 2014Applicant: QUALCOMM INCORPORATEDInventors: Krishnakumar Gopalakrishnan, Eric I Mikuteit
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Publication number: 20140055082Abstract: Exemplary embodiments are directed to systems, devices, methods, and computer-readable media for calibrating a charging current. A device may include a charger for conveying an output voltage to a chargeable device. The device may also include a monitoring system including an analog-to-digital converter for measuring a current received by the chargeable device. Further, the device may include a control device configured to receive a charging current value from the monitoring system and convey a signal to the charger in response to a comparison of the charging current value to a target current value.Type: ApplicationFiled: March 5, 2013Publication date: February 27, 2014Applicant: QUALCOMM IncorporatedInventors: Cheong Kun, Eric B. Zeisel, David Keitel, Eric I. Mikuteit, Abhijeet V. Dharmapurikar, Todd R. Sutton
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Publication number: 20140028285Abstract: A method and apparatus for providing a temperature sensing loop used in connection with a current sensing component, such as a BATFET, in order to compensate for variations in the BATFET's resistance due to temperature variations. The temperature sensing loop detects a temperature of the BATFET and regulates the gate voltage of the BATFET based on the detected temperature in order to compensate for changes in the BATFET's resistance. The temperature sensing feedback loop maintains the BATFET at a constant resistance for current sensing through negative feedback control. The BATFET and temperature sensing loop can be provided as components of an on-chip fuel gauging application for a UE.Type: ApplicationFiled: July 25, 2012Publication date: January 30, 2014Applicant: QUALCOMM INCORPORATEDInventors: Baiying Yu, Nihit Bajaj, Troy Stockstad, Eric I. Mikuteit
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Publication number: 20130275067Abstract: Systems and methods for determining a state of charge of a battery on a mobile device are disclosed. An exemplary method may include obtaining, when the battery is applying a level of current below a threshold level, an initial state of charge of the battery based upon a measured open circuit voltage value that is applied by the battery. Charge drawn from, and provided to, the battery is monitored from a time after the measured open circuit voltage value is obtained and a state of charge value is calculated when the battery is loaded after the initial open circuit voltage value is obtained based upon the monitored charge. An estimated open circuit voltage for the battery is calculated based upon simultaneous measurements of battery voltage and battery current, and a corrected state of charge value is generated using the estimated open circuit voltage.Type: ApplicationFiled: January 23, 2013Publication date: October 17, 2013Applicant: QUALCOMM INNOVATION CENTER, INC.Inventors: Eric I. Mikuteit, Todd R. Sutton, James P. Stump, Abhijeet V. Dharmapurikar, Bobby M. Sadsad, Jungim Kim