Patents by Inventor George Pieter Reitsma
George Pieter Reitsma 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: 11942960Abstract: An analog-to-digital (ADC) converter system and method of using the system that can be used in low power situations. The converter can periodically or recurrently turn off a reference standard in order to conserve power and instead using a stable supply source as a reference voltage. A precise conversion for signal from the analog to the digital domain while maintaining a low quiescent current.Type: GrantFiled: January 31, 2022Date of Patent: March 26, 2024Assignee: Analog Devices, Inc.Inventors: George Pieter Reitsma, Karthik Pappu, Raymond Thomas Perry, Kalin v. Lazarov, James Raymond Catt, Michael C. W. Coln
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Publication number: 20230370076Abstract: A data channel includes a power constrained first channel portion to receive energy from a limited power source and a non-power constrained second channel portion to receive energy from a different power source than the first channel portion. The first channel portion includes an ADC circuit to output an ADC data sample, a first transmitter circuit configured to serially transmit data that includes ON bits and OFF bits, and logic circuitry configured to derive transmit data from the ADC data sample. The transmitter circuit uses more energy transmitting the ON bits than the OFF bits, and the derived transmit data has a reduced number of the ON bits from the ADC data sample. The second channel portion includes a first receiver circuit to receive the derived transmit data from the first transmitter circuit of the first channel portion.Type: ApplicationFiled: April 4, 2023Publication date: November 16, 2023Inventors: Andreas Koch, George Pieter Reitsma
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Publication number: 20230246652Abstract: An analog-to-digital (ADC) converter system and method of using the system that can be used in low power situations. The converter can periodically or recurrently turn off a reference standard in order to conserve power and instead using a stable supply source as a reference voltage. A precise conversion for signal from the analog to the digital domain while maintaining a low quiescent current.Type: ApplicationFiled: January 31, 2022Publication date: August 3, 2023Inventors: George Pieter Reitsma, Karthik Pappu, Raymond Thomas Perry, Kalin V. Lazarov, James Raymond Catt, Michael C.W. Coln
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Patent number: 11652492Abstract: A system for processing a signal in a signal chain having decentralized embedded power management of components of the signal chain includes an input circuit to generate a measurement signal responsive to a stimulus, where the measurement signal is indicative of a characteristic of the stimulus. The system additionally includes a signal converter circuit coupled to the input circuit to convert the measurement signal to a digital signal according to a timing condition for capturing a sample of the measurement signal. The signal converter includes a control circuit to provide electrical power to the input circuit based on the timing condition and a sampling circuit to capture the sample of the measurement signal responsive to an indicator signal generated by the sensor circuit.Type: GrantFiled: December 30, 2020Date of Patent: May 16, 2023Assignee: Analog Devices International Unlimited CompanyInventors: George Pieter Reitsma, Raymond Thomas Perry, Quan Wan, David James Plourde, Andreas Koch, Paul A. Perrault
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Publication number: 20230046102Abstract: A semiconductor Hall plate-based sensor can provide information about package stress and can be substantially immune to the influence of magnetic fields. In an example, the sensor can include a Hall plate and an excitation circuit. The excitation circuit can provide signals to respective node pairs of the Hall plate. A measurement circuit can receive information about a first electric signal at a first pair of nodes in response to a first portion of the excitation signal, and can receive information about a second electric signal at a second pair of nodes in response to a second portion of the excitation signal. The first and second electric signals can indicate a charge carrier mobility characteristic of the semiconductor, which can be used to provide an indication of physical stress on the sensor.Type: ApplicationFiled: August 2, 2022Publication date: February 16, 2023Inventors: George Pieter Reitsma et al., Kalin V. Lazarov
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Publication number: 20230049755Abstract: A semiconductor-based stress sensor can include a bipolar transistor device with first and second collector terminals. An excitation circuit can provide an excitation signal to an emitter terminal of the bipolar transistor device, and a physical stress indicator for the semiconductor can be provided based on a relationship between signals measured at the collector terminals in response to the excitation signal. The signals can indicate a charge carrier mobility characteristic of the semiconductor, which can be used to provide an indication of physical stress. In an example, the physical stress indicator is based on a current deflection characteristic of a base region of the transistor device.Type: ApplicationFiled: August 2, 2022Publication date: February 16, 2023Inventors: George Pieter Reitsma et al., Kalin V. Lazarov
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Publication number: 20220209681Abstract: A system for processing a signal in a signal chain having decentralized embedded power management of components of the signal chain includes an input circuit to generate a measurement signal responsive to a stimulus, where the measurement signal is indicative of a characteristic of the stimulus. The system additionally includes a signal converter circuit coupled to the input circuit to convert the measurement signal to a digital signal according to a timing condition for capturing a sample of the measurement signal. The signal converter includes a control circuit to provide electrical power to the input circuit based on the timing condition and a sampling circuit to capture the sample of the measurement signal responsive to an indicator signal generated by the sensor circuit.Type: ApplicationFiled: December 30, 2020Publication date: June 30, 2022Inventors: George Pieter Reitsma, Raymond Thomas Perry, Quan Wan, David James Plourde, Andreas Koch, Paul A. Perrault
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Patent number: 10868554Abstract: Techniques to reduce the on-time of a multi-stage ADC circuit by combining the settling time of a signal conditioning circuit, e.g., buffer circuit, and the setting time of a residue amplifier when cancelling the offset of the signal conditioning circuit. The techniques can allow the signal conditioning circuit and the residue amplifier to settle together.Type: GrantFiled: December 6, 2019Date of Patent: December 15, 2020Assignee: Analog Devices International Unlimited CompanyInventors: George Pieter Reitsma, Raymond Thomas Perry
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Patent number: 10848166Abstract: Techniques for saving operating power of an analog-to-digital converter (ADC) are provided. In an example, a circuit can include an ADC configured to provide a multiple-bit digital representation of an analog input during a first mode of operation and an output configured to provide a single bit representation of a first comparison of the analog input signal to a second analog signal during a second mode of operation. In certain examples, the circuit can include an encoder configured to provide the multiple-bit digital representation during the first mode and to power down during the second mode of operation.Type: GrantFiled: December 6, 2019Date of Patent: November 24, 2020Assignee: Analog Devices International Unlimited CompanyInventors: George Pieter Reitsma, Andreas Koch
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Patent number: 10338055Abstract: A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive senor can be driven with an excitation current at multiple sensor excitation frequencies (?) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(?) as a function of the sensor excitation frequency (?), and the resulting induced eddy currents. Multiple sensor impedance Zs(?) measurements, at the multiple sensor excitation frequencies (?), can be determined, which represent electromagnetic properties of the target material (such as permittivity ?, permeability ?, and resistivity ?), based on the induced eddy currents.Type: GrantFiled: August 15, 2017Date of Patent: July 2, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: George Pieter Reitsma
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Patent number: 10274526Abstract: Remote inductive sensing uses a sensor resonator with a remote sense inductor coupled to a resonator capacitor through a shielded transmission line. The T-line includes a signal line and a shield return line: the sense inductor is connected at a T-line sensing end between the signal line and the shield return line, and the resonator capacitor is connected at a T-line terminal end to at least the signal line. An inductance-to-data converter (IDC) is connected at the T-line terminal end to the signal line and shield return line (set to a common mode voltage). In operation, the IDC drives oscillation signals over the signal line to the sensor resonator to sustain a resonance state, with the sense inductor projecting a magnetic sensing field, and converts changes in oscillation drive signals, representing changes in resonance state resulting from a sensed condition, into sensor data corresponding to the sensed condition.Type: GrantFiled: April 12, 2017Date of Patent: April 30, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: George Pieter Reitsma, Dongtai Liu
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Patent number: 10036656Abstract: A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a sensing domain area to change. A portion of the target always lies within at least one of the sensing domain areas of the plane.Type: GrantFiled: October 24, 2016Date of Patent: July 31, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: George Pieter Reitsma, Richard Dean Henderson, Jonathan Baldwin
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Patent number: 9875586Abstract: An inductive coded lock system includes an inductive lock mechanism, and a conductive key/target. The inductive lock mechanism includes multiple inductor coils and sensor circuitry. Each inductor coil is operable to project a magnetic field defining a sensing area proximate to the inductor/coil, the inductor coils being spatially arranged to define a key/target sensing area incorporating each inductor coil sensing area. The sensor circuitry drives inductor coils, and measures sensor response (such as with an inductance comparator) to a key/target inserted within the key/target sensing area, including detecting an unlock condition corresponding to a pre-defined coded lock pattern. The key/target includes active and inactive areas (such as conductive/nonconductive) corresponding spatially to the sensing areas in the key target sensing area, the active and inactive areas arranged in a pre-defined coded key pattern corresponding to the pre-defined coded lock pattern.Type: GrantFiled: January 21, 2016Date of Patent: January 23, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: George Pieter Reitsma
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Publication number: 20170350873Abstract: A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive senor can be driven with an excitation current at multiple sensor excitation frequencies (?) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(?) as a function of the sensor excitation frequency (?), and the resulting induced eddy currents. Multiple sensor impedance Zs(?) measurements, at the multiple sensor excitation frequencies (?), can be determined, which represent electromagnetic properties of the target material (such as permittivity ?, permeability ?, and resistivity ?), based on the induced eddy currents.Type: ApplicationFiled: August 15, 2017Publication date: December 7, 2017Inventor: George Pieter Reitsma
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Patent number: 9829501Abstract: A rotational sensing system is adaptable to sensing motor rotation based on eddy current sensing. An axial target surface is incorporated with the motor rotor, and includes one or more conductive target segment(s). An inductive sensor is mounted adjacent the axial target surface, and includes one or more inductive sense coil(s), such that rotor rotation rotates the target segment(s) laterally under the sense coil(s). An inductance-to-digital converter (IDC) drives sensor excitation current to project a magnetic sensing field toward the rotating axial target surface. Sensor response is characterized by successive sensor phase cycles that cycle between LMIN in which a sense coil is aligned with a target segment, and LMAX in which the sense coil is misaligned. The number of sensor phase cycles in a rotor rotation cycle corresponds to the number of target segments. The IDC converts sensor response measurements from successive sensor phase cycles into rotational data.Type: GrantFiled: April 15, 2015Date of Patent: November 28, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Dongtai Liu, Evgeny Fomin, George Pieter Reitsma
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Publication number: 20170292981Abstract: Remote inductive sensing uses a sensor resonator with a remote sense inductor coupled to a resonator capacitor through a shielded transmission line. The T-line includes a signal line and a shield return line: the sense inductor is connected at a T-line sensing end between the signal line and the shield return line, and the resonator capacitor is connected at a T-line terminal end to at least the signal line. An inductance-to-data converter (IDC) is connected at the T-line terminal end to the signal line and shield return line (set to a common mode voltage). In operation, the IDC drives oscillation signals over the signal line to the sensor resonator to sustain a resonance state, with the sense inductor projecting a magnetic sensing field, and converts changes in oscillation drive signals, representing changes in resonance state resulting from a sensed condition, into sensor data corresponding to the sensed condition.Type: ApplicationFiled: April 12, 2017Publication date: October 12, 2017Inventors: George Pieter Reitsma, Dongtai Liu
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Patent number: 9733231Abstract: A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive sensor can be driven with an excitation current at multiple sensor excitation frequencies (?) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(?) as a function of the sensor excitation frequency (?), and the resulting induced eddy currents. Multiple sensor impedance Zs(?) measurements, at the multiple sensor excitation frequencies (?), can be determined, which represent electromagnetic properties of the target material (such as permittivity ?, permeability ?, and resistivity ?), based on the induced eddy currents.Type: GrantFiled: February 4, 2015Date of Patent: August 15, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: George Pieter Reitsma
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Publication number: 20170038227Abstract: A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a sensing domain area to change. A portion of the target always lies within at least one of the sensing domain areas of the plane.Type: ApplicationFiled: October 24, 2016Publication date: February 9, 2017Inventors: George Pieter Reitsma, Richard Dean Henderson, Jonathan Baldwin
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Patent number: 9479134Abstract: A position detecting system detects and responds to the movement of a target through a sensing domain area of a plane. The movement causes the amount of the target that lies within a sensing domain area to change. A portion of the target always lies within at least one of the sensing domain areas of the plane.Type: GrantFiled: December 23, 2013Date of Patent: October 25, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: George Pieter Reitsma, Richard Dean Henderson, Jonathan Baldwin
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Publication number: 20160223483Abstract: A multi-frequency inductive sensing system can be used for spectrographic material analysis of a conductive target material (such as tissue) based on electrical impedance spectroscopy. An inductive sensor can be driven with an excitation current at multiple sensor excitation frequencies (?) to project a time-varying magnetic field into a sensing area on the surface of the target material, inducing eddy currents within the target material. The inductive sensor can be characterized by a sensor impedance Z(?) as a function of the sensor excitation frequency (?), and the resulting induced eddy currents. Multiple sensor impedance Zs(?) measurements, at the multiple sensor excitation frequencies (?), can be determined, which represent electromagnetic properties of the target material (such as permittivity ?, permeability ?, and resistivity ?), based on the induced eddy currents.Type: ApplicationFiled: February 4, 2015Publication date: August 4, 2016Inventor: George Pieter Reitsma