Patents by Inventor David W. Ritter
David W. Ritter 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: 20150244179Abstract: A receiver device in a coupled coil system for wireless energy transfer includes a receiver coil and a load device operatively connected to the receiver coil and configured to receive a signal from the receiver coil. As one example, the load device is a rechargeable battery. An adjusting filter is included in the receiver device and is operatively connected between the receiver coil and the load device. The adjusting filter can be used to transform the effective resistance or impedance of the load as presented to the transformer during energy transfer so that the effective resistant or impedance of the load is maintained at a substantially constant level, and the signal received by the load device is maintained at a substantially constant level.Type: ApplicationFiled: February 20, 2015Publication date: August 27, 2015Inventors: David W. Ritter, Jeffrey M. Alves, Todd K. Moyer, Steven G. Herbst
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Publication number: 20150145764Abstract: Described herein are optical proximity detectors, methods for use therewith, and systems including an optical proximity detector. Such optical proximity detectors include an analog front-end and a digital back-end. In certain embodiments, the digital back-end includes a dynamic gain and phase offset corrector, a cross-talk corrector, a phase and magnitude calculator, and a static phase offset corrector. The dynamic gain and phase offset corrector corrects for dynamic variations in gain and phase offset of the analog front-end due to changes in temperature and/or operating voltage levels. The crosstalk corrector corrects for electrical and/or optical crosstalk associated with the analog front-end. The phase and magnitude calculator calculates phase and magnitude values in dependence on the corrected versions of digital in-phase and quadrature-phase signals received from the analog front-end. The static phase offset corrector corrects for a static phase offset of the optical proximity detector.Type: ApplicationFiled: September 24, 2014Publication date: May 28, 2015Inventors: Itaru Hiromi, Philip V. Golden, David W. Ritter, Pradeep Bhardwaj, Steven Herbst
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Publication number: 20150097443Abstract: In an inductive energy transfer system, the phase of a signal that is applied to a transmitter coil to transfer energy is adjusted while energy is transferred from the transmitter device to a receiver device. The phase of the signal can be adjusted by changing a state of a DC-to-AC converter from a converting state to a non-converting state. The DC-to-AC converter outputs a signal that is applied to the transmitter coil when the DC-to-AC converter is in a converting state. A signal is not applied to the transmitter coil when the DC-to-AC converter is in a non-converting state.Type: ApplicationFiled: September 30, 2014Publication date: April 9, 2015Inventors: Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst, David W. Ritter, Jeffrey J. Terlizzi
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Publication number: 20140327900Abstract: A system and method for identifying a position of a moving object, regardless of static objects present in the optical field of an active infrared (IR) proximity detector, is provided. Moreover, a modulated light emitting diode (LED) signal is captured and processed through I/Q demodulation. Specifically, the reflections received at an IR sensor are demodulated to generate in-phase (I) and quadrature phase (Q) signals and the derivative of I/Q signals is obtained to isolate motion. For example, an I/Q domain differentiator or a high pass filter is employed to calculate the derivative, which actively remove the effects of all forms of static interference. Further, the phase of the derivative I/Q signals is determined and is utilized to reconstruct the distance at which the motion occurred.Type: ApplicationFiled: June 4, 2014Publication date: November 6, 2014Inventors: David W. Ritter, Itaru Hiromi
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Patent number: 8872978Abstract: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels. One or more values indicative of one or more levels of compensation provided by the equalizer are stored in memory and/or registers for each time, of a plurality of times. A monitor monitors for changes in the cable and/or the video signal transmitted over the cable based on the stored values.Type: GrantFiled: September 9, 2011Date of Patent: October 28, 2014Assignee: Intersil Americas LLCInventors: David W. Ritter, Kathryn M. Tucker
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Patent number: 8760631Abstract: A system and method for identifying a position of a moving object, regardless of static objects present in the optical field of an active infrared (IR) proximity detector, is provided. Moreover, a modulated light emitting diode (LED) signal is captured and processed through I/Q demodulation. Specifically, the reflections received at an IR sensor are demodulated to generate in-phase (I) and quadrature phase (Q) signals and the derivative of I/Q signals is obtained to isolate motion. For example, an I/Q domain differentiator or a high pass filter is employed to calculate the derivative, which actively remove the effects of all forms of static interference. Further, the phase of the derivative I/Q signals is determined and is utilized to reconstruct the distance at which the motion occurred.Type: GrantFiled: December 28, 2010Date of Patent: June 24, 2014Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Itaru Hiromi
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Patent number: 8558955Abstract: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels. The compensating is selectively locked and reset in response to specific conditions being detected, e.g., a locking condition and a reset condition.Type: GrantFiled: October 20, 2009Date of Patent: October 15, 2013Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Warren Craddock, Robert David Zucker
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Patent number: 8530819Abstract: A system and method that compensates for the effects of ambient light in a time of flight (TOF) sensor front end is provided. Moreover, a direct current (DC) correction loop is utilized at the front end, which removes a DC component from a current generated by the TOF sensor and accordingly prevents saturating the front end. The DC correction loop attenuates the DC component without adding significant thermal noise at a modulation frequency and provides a corrected signal to the front end circuitry. The corrected signal is processed and utilized to detect a position of an object within the optical field of the sensor.Type: GrantFiled: January 25, 2011Date of Patent: September 10, 2013Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Philip Golden, Carl Warren Craddock, Kevin Brehmer
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Patent number: 8451382Abstract: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels.Type: GrantFiled: February 6, 2013Date of Patent: May 28, 2013Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Robert David Zucker, Warren Craddock
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Patent number: 8418764Abstract: Methods of reducing the permeability of a subterranean formation to aqueous-based fluids using a water-soluble relative permeability modifier that comprises a reaction product of a hydrophilic compound and a hydrophilic polymer. In some methods the hydrophilic polymer may be selected from the group consisting of: a polyacrylamide, a polyvinylamine, a poly(vinylamine/vinyl alcohol), an alkyl acrylate polymer, and a combination thereof. In other methods the hydrophilic polymer may be selected from the group consisting of: a polyvinylamine; a poly(vinylamine/vinyl alcohol); a cellulose; a chitosan; a polyamide; a polyetheramine; a polyethyleneimine; a polyhydroxyetheramine; a polylysine; a polysulfone; a gum; a starch, and a combination thereof.Type: GrantFiled: November 9, 2011Date of Patent: April 16, 2013Assignee: Halliburton Energy Services, Inc.Inventors: Ronald G. Dusterhoft, Bradley L. Todd, David W. Ritter, Larry S. Eoff
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Patent number: 8390740Abstract: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels.Type: GrantFiled: March 26, 2009Date of Patent: March 5, 2013Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Robert D. Zucker, Warren Craddock
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Publication number: 20120314130Abstract: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels. One or more values indicative of one or more levels of compensation provided by the equalizer are stored in memory and/or registers for each time, of a plurality of times. A monitor monitors for changes in the cable and/or the video signal transmitted over the cable based on the stored values.Type: ApplicationFiled: September 9, 2011Publication date: December 13, 2012Applicant: Intersil Americas Inc.Inventors: David W. Ritter, Kathryn M. Tucker
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Patent number: 8274037Abstract: A system and method for automatically calibrating a Time-of-Flight (TOF) transceiver system for proximity/motion detection, is provided. Moreover, the system comprises a component that senses a signal (e.g., current or voltage) at an light emitting diode (LED), an attenuator, a signal injector at a sensor and a switching circuit that toggles between a normal mode (e.g., when signal from the sensor is input to the sensor front end) and a calibration mode (e.g., when signal from the attenuator is input to the sensor front end). During the calibration mode, the sensor front end identifies the phase delay error within the signal path, including board and/or package parasitic, and accounts for the phase delay error during proximity/motion detection in the normal mode.Type: GrantFiled: January 25, 2011Date of Patent: September 25, 2012Assignee: Intersil Americas Inc.Inventors: David W. Ritter, Carl Warren Craddock, Philip Golden
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Publication number: 20120048550Abstract: Methods of reducing the permeability of a subterranean formation to aqueous-based fluids using a water-soluble relative permeability modifier that comprises a reaction product of a hydrophilic compound and a hydrophilic polymer. In some methods the hydrophilic polymer may be selected from the group consisting of: a polyacrylamide, a polyvinylamine, a poly(vinylamine/vinyl alcohol), an alkyl acrylate polymer, and a combination thereof. In other methods the hydrophilic polymer may be selected from the group consisting of: a polyvinylamine; a poly(vinylamine/vinyl alcohol); a cellulose; a chitosan; a polyamide; a polyetheramine; a polyethyleneimine; a polyhydroxyetheramine; a polylysine; a polysulfone; a gum; a starch, and a combination thereof.Type: ApplicationFiled: November 9, 2011Publication date: March 1, 2012Applicant: Halliburton Energy Services, Inc.Inventors: Ronald G. Dusterhoft, Bradley L. Todd, David W. Ritter, Larry S. Eoff
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Patent number: 8091638Abstract: Methods of controlling fluid loss in a subterranean formation comprising: providing a treatment fluid comprising an aqueous fluid and a fluid loss control additive comprising a water-soluble polymer having hydrophobic or hydrophilic modification; introducing the treatment fluid into an interval of a well bore, the well bore penetrating the subterranean formation; creating one or more perforations in the interval of the well bore, wherein the perforations extend from the well bore and into the subterranean formation; and allowing the treatment fluid to contact a portion of the subterranean formation through the one or more perforations. Methods of a reducing fluid loss from a perforated and/or gravel packed interval of a well bore using a fluid loss control additive comprising a water-soluble polymer having hydrophobic or hydrophilic modification.Type: GrantFiled: February 22, 2006Date of Patent: January 10, 2012Assignee: Halliburton Energy Services, Inc.Inventors: Ronald G. Dusterhoft, Bradley L. Todd, David W. Ritter, Larry S. Eoff
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Publication number: 20110249134Abstract: An imaging system, semiconductor device, and method of manufacture of a photo-detector device are disclosed. For example, an imaging system is disclosed, which includes a photo-detector unit including a plurality of conductive trenches formed within the photo-detector unit, and a plurality of electrical contacts, each electrical contact connected to a respective conductive trench. The imaging system further includes a light data processor unit coupled to an output of the photo-detector unit to convert an analog signal received from the photo-detector unit to a digital signal, a processing unit coupled to an output of the light data processor unit to generate a control signal in response to the digital signal, and a display unit coupled to an output of the processing unit to vary the intensity of an image displayed in response to the control signal.Type: ApplicationFiled: November 3, 2010Publication date: October 13, 2011Applicant: INTERSIL AMERICAS INC.Inventors: Aaron M. Dennison-Gibby, David W. Ritter, Philip Golden, Carl Warren Craddock, I-Shan Sun
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Publication number: 20110180709Abstract: A system and method for identifying a position of a moving object, utilizing a serial chain of sensors is provided. The serial chain reduces the power needed for the motion detection system, allowing implementation of the motion detection system on a low-power computing device, such as a microcontroller. The serial chain can provide automatic address assignment without dedicated pins. The serial chain can also provide automatic sequencing of access to a shared LED. The serial chain can also provide automatic time correlation of data from multiple sensors in the motion detection system.Type: ApplicationFiled: January 25, 2011Publication date: July 28, 2011Applicant: INTERSIL AMERICAS INC.Inventors: Warren Craddock, David W. Ritter, Philip Golden
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Publication number: 20110181861Abstract: A system and method for identifying a position of a moving object, regardless of static objects present in the optical field of an active infrared (IR) proximity detector, is provided. Moreover, a modulated light emitting diode (LED) signal is captured and processed through I/Q demodulation. Specifically, the reflections received at an IR sensor are demodulated to generate in-phase (I) and quadrature phase (Q) signals and the derivative of I/Q signals is obtained to isolate motion. For example, an I/Q domain differentiator or a high pass filter is employed to calculate the derivative, which actively remove the effects of all forms of static interference. Further, the phase of the derivative I/Q signals is determined and is utilized to reconstruct the distance at which the motion occurred.Type: ApplicationFiled: December 28, 2010Publication date: July 28, 2011Applicant: INTERSIL AMERICAS INC.Inventors: David W. Ritter, Itaru Hiromi
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Publication number: 20110181254Abstract: A system and method that compensates for the effects of ambient light in a time of flight (TOF) sensor front end is provided. Moreover, a direct current (DC) correction loop is utilized at the front end, which removes a DC component from a current generated by the TOF sensor and accordingly prevents saturating the front end. The DC correction loop attenuates the DC component without adding significant thermal noise at a modulation frequency and provides a corrected signal to the front end circuitry. The corrected signal is processed and utilized to detect a position of an object within the optical field of the sensor.Type: ApplicationFiled: January 25, 2011Publication date: July 28, 2011Applicant: INTERSIL AMERICAS INC.Inventors: David W. Ritter, Philip Golden, Carl Warren Craddock, Kevin Brehmer
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Publication number: 20110181892Abstract: A system and method for automatically calibrating a Time-of-Flight (TOF) transceiver system for proximity/motion detection, is provided. Moreover, the system comprises a component that senses a signal (e.g., current or voltage) at an light emitting diode (LED), an attenuator, a signal injector at a sensor and a switching circuit that toggles between a normal mode (e.g., when signal from the sensor is input to the sensor front end) and a calibration mode (e.g., when signal from the attenuator is input to the sensor front end). During the calibration mode, the sensor front end identifies the phase delay error within the signal path, including board and/or package parasitic, and accounts for the phase delay error during proximity/motion detection in the normal mode.Type: ApplicationFiled: January 25, 2011Publication date: July 28, 2011Applicant: INTERSIL AMERICAS INC.Inventors: David W. Ritter, Carl Warren Craddock, Philip Golden