Patents by Inventor Viola Schäffer
Viola Schäffer 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: 20240153938Abstract: An integrated circuit includes a first transistor array over a semiconductor substrate and is distributed among a first plurality of first transistor banks. A second transistor array in or over the semiconductor substrate is distributed among a second plurality of second transistor banks. A first one of the first transistor banks is located between a first one and a second one of the second transistor banks, and the second one of the second transistor banks is located between the first one of the first transistor banks and a second one of the first transistor banks. The first transistor array and the second transistor array may be alternately operated to implement a voltage-conversion integrated circuit.Type: ApplicationFiled: December 30, 2022Publication date: May 9, 2024Inventors: Neil Gibson, Jerry L. Doorenbos, Gerald Gradl, VIOLA Schaeffer, Archana Venugopal, Henry L. Edwards
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Publication number: 20240111001Abstract: In some examples, an apparatus comprises a first coil, a second coil, a control circuit, and a processing circuit. The second coil is magnetically coupled to the first coil. The control circuit has a signal output coupled to the first coil, and a control output, and the control circuit configured to: responsive to a state of the control input, select a field strength level from a set of discrete field strength levels; and provide a first signal representing the selected field strength level at the signal output. Also, the processing circuit has processing inputs and a processing output, the processing inputs coupled to the second coil, the processing output coupled to the control input, and the processing circuit configured to, responsive to a second signal across the processing inputs, set a state of the processing output representing a polarity of a magnetic field sensed by the second coil.Type: ApplicationFiled: September 29, 2022Publication date: April 4, 2024Inventors: Preetinder Garcha, Srinath Ramaswamy, Viola Schaeffer
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Patent number: 11092656Abstract: A circuit and method for magnetic field detection is disclosed. A fluxgate sensor comprises a fluxgate having a first core and a second core. A sense coil has a first winding around the first fluxgate core and a second winding around the second fluxgate core. A fluxgate detection circuit is coupled to the sense coil and outputs a signal proportional to an external magnetic field applied to the fluxgate. A detection circuit is coupled to the first winding and outputs a signal that indicates whether voltage pulses have been detected on the first winding.Type: GrantFiled: December 19, 2015Date of Patent: August 17, 2021Assignee: Texas Instruments IncorporatedInventors: Martijn F. Snoeij, Viola Schäffer
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Patent number: 10459040Abstract: An integrated fluxgate magnetic gradient sensor includes a common mode sensitive fluxgate magnetometer and a differential mode sensitive fluxgate magnetometer. The common mode sensitive fluxgate magnetometer includes a first core adjacent to a second core. The first and second cores are wrapped by a first excitation wire coil configured to receive an excitation current that affects a differential mode magnetic field. The differential mode sensitive fluxgate magnetometer includes a third core adjacent to the first core and a fourth core adjacent to the second core. The third and fourth cores are wrapped by a second excitation wire coil configured to receive an excitation current that affects a common mode magnetic field.Type: GrantFiled: May 24, 2016Date of Patent: October 29, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Martijn Fridus Snoeij, Viola Schäffer, Gebhard Haug
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Publication number: 20160349334Abstract: An integrated fluxgate magnetic gradient sensor includes a common mode sensitive fluxgate magnetometer and a differential mode sensitive fluxgate magnetometer. The common mode sensitive fluxgate magnetometer includes a first core adjacent to a second core. The first and second cores are wrapped by a first excitation wire coil configured to receive an excitation current that affects a differential mode magnetic field. The differential mode sensitive fluxgate magnetometer includes a third core adjacent to the first core and a fourth core adjacent to the second core. The third and fourth cores are wrapped by a second excitation wire coil configured to receive an excitation current that affects a common mode magnetic field.Type: ApplicationFiled: May 24, 2016Publication date: December 1, 2016Inventors: Martijn Fridus SNOEIJ, Viola SCHÄFFER, Gebhard HAUG
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Publication number: 20160334473Abstract: A circuit and method for magnetic field detection is disclosed. A fluxgate sensor comprises a fluxgate having a first core and a second core. A sense coil has a first winding around the first fluxgate core and a second winding around the second fluxgate core. A fluxgate detection circuit is coupled to the sense coil and outputs a signal proportional to an external magnetic field applied to the fluxgate. A detection circuit is coupled to the first winding and outputs a signal that indicates whether voltage pulses have been detected on the first winding.Type: ApplicationFiled: December 19, 2015Publication date: November 17, 2016Applicant: TEXAS INSTRUMENTS DEUTSCHLAND GMBHInventors: Martijn F. Snoeij, Viola Schäffer
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Patent number: 9417293Abstract: A method of processing an output signal and a readout circuit for a magnetic field sensor are disclosed. The purpose of the readout circuit is to generate a digital representation of the magnetic field vector strength. It comprises an input stage for receiving an output signal of the magnetic field sensor; an output stage for outputting a digital output signal corresponding to the sensor output signal; and an analog to digital conversion circuit. The analog to digital conversion circuit receives the sensor output signal and performs, in sequence, a fast conversion process for calculating a number of most significant bits of the digital output signal corresponding to the sensor output signal and for generating a compensation signal, and a delta sigma based conversion process for calculating at least one least significant bit of the digital output signal. The compensation signal is fed back to the sensor input for linearization.Type: GrantFiled: December 27, 2013Date of Patent: August 16, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Viola Schäffer, Mikhail V. Ivanov
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Publication number: 20160202294Abstract: Hybrid magnetic current sensors and sensing apparatus are presented with closed-loop and open-loop circuitry employs first and second integrated magnetic sensors to sense a magnetic field in a magnetic core structure gap to provide high accuracy current measurement via a closed-loop magnetic circuit with the first sensor in a nominal current range as well as open-loop current measurement using the second sensor in an extended second range to accommodate over-current conditions in a host system as well as to provide redundant current sensing functionality.Type: ApplicationFiled: March 21, 2016Publication date: July 14, 2016Inventors: Martijn Fridus Snoeij, Viola Schäffer
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Patent number: 9291648Abstract: Hybrid magnetic current sensors and sensing apparatus are presented with closed-loop and open-loop circuitry employs first and second integrated magnetic sensors to sense a magnetic field in a magnetic core structure gap to provide high accuracy current measurement via a closed-loop magnetic circuit with the first sensor in a nominal current range as well as open-loop current measurement using the second sensor in an extended second range to accommodate over-current conditions in a host system as well as to provide redundant current sensing functionality.Type: GrantFiled: February 28, 2014Date of Patent: March 22, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Martijn Fridus Snoeij, Viola Schäffer
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Publication number: 20150042325Abstract: Hybrid magnetic current sensors and sensing apparatus are presented with closed-loop and open-loop circuitry employs first and second integrated magnetic sensors to sense a magnetic field in a magnetic core structure gap to provide high accuracy current measurement via a closed-loop magnetic circuit with the first sensor in a nominal current range as well as open-loop current measurement using the second sensor in an extended second range to accommodate over-current conditions in a host system as well as to provide redundant current sensing functionality.Type: ApplicationFiled: February 28, 2014Publication date: February 12, 2015Applicant: Texas Instruments Deutschland GmbHInventors: Martijn Fridus Snoeij, Viola Schäffer
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Publication number: 20140184214Abstract: A method of processing an output signal and a readout circuit for a magnetic field sensor are disclosed. The purpose of the readout circuit is to generate a digital representation of the magnetic field vector strength. It comprises an input stage for receiving an output signal of the magnetic field sensor; an output stage for outputting a digital output signal corresponding to the sensor output signal; and an analog to digital conversion circuit. The analog to digital conversion circuit receives the sensor output signal and performs, in sequence, a fast conversion process for calculating a number of most significant bits of the digital output signal corresponding to the sensor output signal and for generating a compensation signal, and a delta sigma based conversion process for calculating at least one least significant bit of the digital output signal. The compensation signal is fed back to the sensor input for linearization.Type: ApplicationFiled: December 27, 2013Publication date: July 3, 2014Inventors: Viola Schäffer, Mikhail V. Ivanov