Patents by Inventor Johan Grundlingh
Johan Grundlingh 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: 9322856Abstract: A circuit and method are provided for detecting a power of a signal amplified in a power amplifier. A diode and a voltage bias source are used to shift a voltage of the signal taken at a base of an amplifying transistor of the power amplifier, to generate a positive signal. The positive signal is provided to a base input of an emitter follower exhibiting high input impedance to generate a power detector output which follows the positive signal.Type: GrantFiled: October 1, 2012Date of Patent: April 26, 2016Assignee: SIGE SEMICONDUCTOR, INC.Inventors: Gordon Glen Rabjohn, Johan Grundlingh, Adrian Peter Long
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Publication number: 20130027023Abstract: A circuit and method are provided for detecting a power of a signal amplified in a power amplifier. A diode and a voltage bias source are used to shift a voltage of the signal taken at a base of an amplifying transistor of the power amplifier, to generate a positive signal. The positive signal is provided to a base input of an emitter follower exhibiting high input impedance to generate a power detector output which follows the positive signal.Type: ApplicationFiled: October 1, 2012Publication date: January 31, 2013Applicant: SIGE SEMICONDUCTOR, INC.Inventors: Gordon Glen Rabjohn, Johan Grundlingh, Adrian Peter Long
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Patent number: 8278963Abstract: A circuit and method are provided for detecting a power of a signal amplified in a power amplifier. A diode and a voltage bias source are used to shift a voltage of the signal taken at a base of an amplifying transistor of the power amplifier, to generate a positive signal. The positive signal is provided to a base input of an emitter follower exhibiting high input impedance to generate a power detector output which follows the positive signal.Type: GrantFiled: April 12, 2010Date of Patent: October 2, 2012Assignee: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh, Adrian Long
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Publication number: 20110248703Abstract: A circuit and method are provided for detecting a power of a signal amplified in a power amplifier. A diode and a voltage bias source are used to shift a voltage of the signal taken at a base of an amplifying transistor of the power amplifier, to generate a positive signal. The positive signal is provided to a base input of an emitter follower exhibiting high input impedance to generate a power detector output which follows the positive signal.Type: ApplicationFiled: April 12, 2010Publication date: October 13, 2011Applicant: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh, Adrian Long
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Patent number: 7728663Abstract: A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and another voltage in a second mode of operation to the power amplifier. The collector boost circuit uses an indicator signal derived by an RF detector to switch between the first and the second mode of operation. The another voltage is a boosted voltage greater than the first voltage and is provided when required during peak excursions to prevent amplifier clipping through a boost capacitor. The another voltage is continuous and varies in accordance with the detected peak signal amplitude.Type: GrantFiled: June 22, 2006Date of Patent: June 1, 2010Assignee: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh, Edward J. Whittaker
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Patent number: 7702301Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining an error signals with the appropriate phase shift with input signals to be amplified. The error signal being generated by subtractively combining a fed-forward portion of the input signal with a portion of the fed-back amplified output signal, and signal processing applied to it between its generation and application to correcting the input signal in the baseband domain. The error therefore being down-converted, filtered, and up-converted in the feedback path. The filtered baseband error signal components providing inputs to a controller which adjusts active elements of the amplification and feedback path in order to minimize the distortion within the output of the amplifier.Type: GrantFiled: May 30, 2007Date of Patent: April 20, 2010Assignee: Sige Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh
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Patent number: 7689180Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining baseband error signals with the appropriate phase shift with baseband input signals, the baseband error signals generated by subtractively combining delayed fed-forward portions of the baseband input signals with baseband converted portions of a fed-back amplified output signal, the amplified output signal being a distorted replica of combined up-converted baseband input signals. The baseband error signals being filtered prior to the combining function, and also providing inputs to a controller which adjusts active elements of the amplification and fed-back paths in order to minimize the distortion within the output of the amplifier.Type: GrantFiled: May 15, 2007Date of Patent: March 30, 2010Assignee: SiGe Semiconductor Inc.Inventors: Johan Grundlingh, Howard James Smith, John Nisbet, Gordon G. Rabjohn
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Patent number: 7680468Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining an error signals with the appropriate phase shift with input signals to be amplified. The error signal being generated by subtractively combining a fed-forward portion of the input signal with a portion of the fed-back amplified output signal, and signal processing applied to it between its generation and application to correcting the input signal in the baseband domain. The error therefore being down-converted, filtered, and up-converted in the feedback path. The filtered baseband error signal components providing inputs to a controller which adjusts active elements of the amplification and feedback path in order to minimize the distortion within the output of the amplifier.Type: GrantFiled: May 30, 2007Date of Patent: March 16, 2010Assignee: SIGE Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh
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Publication number: 20080297247Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining an error signals with the appropriate phase shift with input signals to be amplified. The error signal being generated by subtractively combining a fed-forward portion of the input signal with a portion of the fed-back amplified output signal, and signal processing applied to it between its generation and application to correcting the input signal in the baseband domain. The error therefore being down-converted, filtered, and up-converted in the feedback path. The filtered baseband error signal components providing inputs to a controller which adjusts active elements of the amplification and feedback path in order to minimize the distortion within the output of the amplifier.Type: ApplicationFiled: May 30, 2007Publication date: December 4, 2008Applicant: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh
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Publication number: 20080298501Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining an error signals with the appropriate phase shift with input signals to be amplified. The error signal being generated by subtractively combining a fed-forward portion of the input signal with a portion of the fed-back amplified output signal, and signal processing applied to it between its generation and application to correcting the input signal in the baseband domain. The error therefore being down-converted, filtered, and up-converted in the feedback path. The filtered baseband error signal components providing inputs to a controller which adjusts active elements of the amplification and feedback path in order to minimize the distortion within the output of the amplifier.Type: ApplicationFiled: May 30, 2007Publication date: December 4, 2008Applicant: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh
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Publication number: 20080290939Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining baseband error signals with the appropriate phase shift with baseband input signals, the baseband error signals generated by subtractively combining delayed fed-forward portions of the baseband input signals with baseband converted portions of a fed-back amplified output signal, the amplified output signal being a distorted replica of combined up-converted baseband input signals. The baseband error signals being filtered prior to the combining function, and also providing inputs to a controller which adjusts active elements of the amplification and fed-back paths in order to minimize the distortion within the output of the amplifier.Type: ApplicationFiled: May 25, 2007Publication date: November 27, 2008Applicant: SiGe Semiconductor Inc.Inventors: Johan Grundlingh, Howard James Smith, John Nisbet, Gordon G. Rabjohn
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Publication number: 20080287077Abstract: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining baseband error signals with the appropriate phase shift with baseband input signals, the baseband error signals generated by subtractively combining delayed fed-forward portions of the baseband input signals with baseband converted portions of a fed-back amplified output signal, the amplified output signal being a distorted replica of combined up-converted baseband input signals. The baseband error signals being filtered prior to the combining function, and also providing inputs to a controller which adjusts active elements of the amplification and fed-back paths in order to minimize the distortion within the output of the amplifier.Type: ApplicationFiled: May 15, 2007Publication date: November 20, 2008Applicant: SiGe Semiconductor Inc.Inventors: Johan Grundlingh, Howard James Smith, John Nisbet, Gordon G. Rabjohn
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Patent number: 7391259Abstract: Embodiments of the present invention comprise methods and devices for amplifying a signal by amplifying a first signal and by then amplifying a second signal only if the first signal exceeds a predetermined threshold. The first and second amplified signals are then combined, and the combination is fed back to a signal source and used to control the values of the first and second signal. The combination is further transmitted to a load. In the preferred embodiment, the first amplified signal is transmitted through an impedance inverter before it is combined with the second amplified signal.Type: GrantFiled: July 21, 2006Date of Patent: June 24, 2008Assignee: Zarbana Digital Fund LLCInventors: Kevin Parker, Johan Grundlingh
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Publication number: 20080079489Abstract: Improved methods and systems for amplifying a signal are provided. Specifically, systems and methods for amplifying a signal through a lossy switch element tied to two or more voltage sources are provided. In the preferred embodiment, envelope information from the signal is used to smoothly transition between the two or more voltage sources to provide signal amplification over an increased range.Type: ApplicationFiled: December 3, 2007Publication date: April 3, 2008Applicant: Zarbana Digital Fund LLCInventor: Johan Grundlingh
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Publication number: 20080001683Abstract: The invention relates to the field of electronics, more particularly to the wire bonds incorporated into an integrated circuit package such as a quad flat pack. a ball grid array or hybrid style module. The present invention takes the normally undesirable wire bond inductance and uses it in an operational circuit where positive inductance is required. The circuit in which the wire bond inductance is used is located primarily in the integrated circuit die housed in the integrated circuit package, but may also include off-die components. In one example, a wire bond is used as the required series inductance in a discrete circuit impedance inverter which consists of two shunt-to-ground negative inductances and one series positive inductance. One of the negative inductances is located on-die, while the other is located off-die.Type: ApplicationFiled: October 11, 2006Publication date: January 3, 2008Inventors: James Wight, Johan Grundlingh
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Publication number: 20070296504Abstract: A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and another voltage in a second mode of operation to the power amplifier. The collector boost circuit uses an indicator signal derived by an RF detector to switch between the first and the second mode of operation. The another voltage is a boosted voltage greater than the first voltage and is provided when required during peak excursions to prevent amplifier clipping through a boost capacitor. The another voltage is continuous and varies in accordance with the detected peak signal amplitude.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Applicant: SiGe Semiconductor Inc.Inventors: Gordon G. Rabjohn, Johan Grundlingh, Edward J.W. Whittaker
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Publication number: 20070205828Abstract: A switched-mode Class F power amplifier is provided for parallel connection with at least one other like amplifier, within a Chireix architecture, for combining the signals output therefrom. An input component includes at least one active device configured to be alternately switched by a signal input thereto to present an amplified signal corresponding to the input signal and constituting a low output impedance voltage source. A lumped element impedance inverter is provided between the input component and an output resonator component, the impedance inverter being configured for transforming the low output impedance voltage source to instead constitute a high output impedance current source configured for said parallel connection. In accordance with the invention, the negative reactive component values required by the impedance inverter are eliminated and effectively provided by incorporating those values into pre-selected reactive components of the input and output components.Type: ApplicationFiled: December 18, 2006Publication date: September 6, 2007Inventor: Johan Grundlingh
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Publication number: 20060255857Abstract: Embodiments of the present invention comprise methods and devices for amplifying a signal by amplifying a first signal and by then amplifying a second signal only if the first signal exceeds a predetermined threshold. The first and second amplified signals are then combined, and the combination is fed back to a signal source and used to control the values of the first and second signal. The combination is further transmitted to a load. In the preferred embodiment, the first amplified signal is transmitted through an impedance inverter before it is combined with the second amplified signal.Type: ApplicationFiled: July 21, 2006Publication date: November 16, 2006Inventors: Kevin Parker, Johan Grundlingh
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Publication number: 20060238244Abstract: Improved methods and systems for amplifying a signal are provided. Specifically, systems and methods for amplifying a signal through a lossy switch element tied to two or more voltage sources are provided. In the preferred embodiment, envelope information from the signal is used to smoothly transition between the two or more voltage sources to provide signal amplification over an increased range.Type: ApplicationFiled: November 7, 2005Publication date: October 26, 2006Inventor: Johan Grundlingh
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Publication number: 20060001485Abstract: Embodiments of the present invention comprise methods and devices for amplifying a signal by amplifying a first signal and by then amplifying a second signal only if the first signal exceeds a predetermined threshold. The first and second amplified signals are then combined, and the combination is fed back to a signal source and used to control the values of the first and second signal. The combination is further transmitted to a load. In the preferred embodiment, the first amplified signal is transmitted through an impedance inverter before it is combined with the second amplified signal.Type: ApplicationFiled: July 2, 2004Publication date: January 5, 2006Applicant: IceFyre Semiconductor CorporationInventors: Kevin Parker, Johan Grundlingh