Patents by Inventor Christian Grewing
Christian Grewing 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: 20100329372Abstract: A method and apparatus for generating a carrier frequency signal is disclosed. The method includes generating a first frequency signal; injecting a modulation signal at a first point of the two-point modulation architecture; generating a second frequency signal from the modulation signal; introducing the second frequency signal by mixing the first frequency signal and the second frequency signal to generate a mixed frequency signal and outputting the carrier frequency signal selected from the mixed frequency signal.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicant: Huawei Technologies Co., Ltd.Inventors: Christian Grewing, Anders Jakobsson, Ola Pettersson, Anders Emericks, Bingxin Li
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Patent number: 7835457Abstract: A method and an arrangement for processing a received signal which comprises phase-shift modulated or amplitude-quadrature modulated part-signals which are transmitted in a plurality of different frequency bands, wherein the received signal is processed in a plurality of stages in succession, by multiplying all the input signals to each of the stages by two mutually orthogonal signals in each case to form two intermediate signals in each case, wherein the intermediate signals from one stage in each case act as the input signals to whichever is the succeeding stage in the particular case and the received signal acts as the input signal to the first stage, and wherein an in-phase and/or an quadrature component of the individual part-signals in the different frequency bands are determined from the intermediate signals from the last stage. Parallel, simultaneous reception of a plurality of frequency bands can be implemented relatively easily in this way.Type: GrantFiled: December 20, 2004Date of Patent: November 16, 2010Assignee: Infineon Technologies AGInventors: Martin Friedrich, Christian Grewing, Giuseppe Li Puma, Christoph Sandner, Andreas Wiesbauer, Kay Winterberg, Stefan Van Waasen
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Patent number: 7805124Abstract: Frequency pattern generator (1, 101, 201) for generating frequency pulses, said generator having a first local oscillator unit (2-1, 121, 221) for generating a first radio frequency carrier frequency signal (LO1), at least one second local oscillator unit (2-2, . . . 2-N, 122, 222) for generating at least one second radio frequency carrier frequency signal (LO2), a switching device (3, 103, 203) for passing on one of the radio frequency carrier frequency signals (LO1, LO2) or a zero signal (DC) in a manner dependent on a control signal (CTR), and a mixing stage (9, 109, 209, 212, 309) for mixing the signal (LO) that has been passed on by the switching device (3, 103, 203) with a mixing frequency signal (LF) to form a pulsed output signal (RFOUT), the pulsed output signal (RFOUT) having frequency pulses at a respective frequency (f1, . . . f8) and length (Tp) in a manner dependent on the control signal (CTR).Type: GrantFiled: April 25, 2005Date of Patent: September 28, 2010Assignee: Infineon Technologies AGInventors: Martin Friedrich, Christian Grewing, Giuseppe Li Puma, Christoph Sandner, Andreas Wiesbauer, Kay Winterberg, Stefan Van Waasen
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Publication number: 20100164283Abstract: A power control system is described that reuses current from segregated circuits of the mobile device. In some embodiments, the segregated circuits (or “sections”) can be “stacked” in series (with respect to the power supply) such that power is more efficiently used. The power can be more efficiently used by arranging a first section to reuse current that supplies power to a second section. A power control unit can be used to control regulators.Type: ApplicationFiled: December 24, 2009Publication date: July 1, 2010Applicant: Infineon Technologies AGInventors: Christian Grewing, Stefan Heinrich van Waasen
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Patent number: 7679216Abstract: A power control system is described that reuses current from segregated circuits of the mobile device. In some embodiments, the segregated circuits (or “sections”) can be “stacked” in series (with respect to the power supply) such that power is more efficiently used. The power can be more efficiently used by arranging a first section to reuse current that supplies power to a second section. A power control unit can be used to control regulators.Type: GrantFiled: July 20, 2007Date of Patent: March 16, 2010Assignee: Infineon Technologies AGInventors: Christian Grewing, Stefan Heinrich van Waasen
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Patent number: 7616059Abstract: The invention relates to an differential amplifier circuit comprising an amplifier stage comprising a first and a second transistor, the gates of which are connected to differential input terminals of the amplifier stage. The differential amplifier further comprises a temperature compensation circuit comprising a third and fourth transistor. The third transistor is connected to the source of the first transistor and the fourth transistor is connected to the source of the second transistor. Further, the temperature compensation circuit comprises a constant current source connected to the respective sources of the third and fourth transistors. Thereby the temperature compensation circuit is arranged to provide a feedback resistance in dependence on the operating temperature so as to compensate for variations of the resistance of the first and second transistors.Type: GrantFiled: April 18, 2007Date of Patent: November 10, 2009Assignee: Infineon Technologies AGInventors: Christian Grewing, Detlev Theil, Stefan Van Waasen
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Publication number: 20090206939Abstract: A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational effects. In some example embodiments, the digitally switchable compensation capacitors of the VCO are adjusted to compensate for the effects of activating (from a quiescent state) an output buffer driven by the VCO.Type: ApplicationFiled: April 30, 2009Publication date: August 20, 2009Inventors: Christian Grewing, Stefan Heinrich van Waasen, Emericks Anders
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Patent number: 7573342Abstract: A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational effects. In some example embodiments, the digitally switchable compensation capacitors of the VCO are adjusted to compensate for the effects of activating (from a quiescent state) an output buffer driven by the VCO.Type: GrantFiled: July 20, 2007Date of Patent: August 11, 2009Assignee: Infineon Technologies AGInventors: Christian Grewing, Stefan Heinrich van Waasen, Emericks Anders
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Publication number: 20090190708Abstract: Techniques for frequency synthesis using upconversion PLL processes are described herein.Type: ApplicationFiled: January 30, 2008Publication date: July 30, 2009Applicant: INFINEON TECHNOLOGIES AGInventors: Christian Grewing, Stefan van Waasen
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Publication number: 20090103654Abstract: One embodiment relates to a low intermediate frequency (IF) receiver. The low-IF receiver includes an analog front end that is configured to receive a modulated IQ data signal and provide an in-phase signal and a quadrature signal, where the in-phase signal is phase shifted by approximately 90° relative to the quadrature signal. The low-IF receiver further includes a digital processing block, and a single path that provides only one of the in-phase signal and the quadrature signal to the digital processing block. Other receivers and methods are also disclosed.Type: ApplicationFiled: October 23, 2007Publication date: April 23, 2009Inventors: Stefan van Waasen, Christian Grewing, Michael Lewis
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Publication number: 20090021311Abstract: A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational effects. In some example embodiments, the digitally switchable compensation capacitors of the VCO are adjusted to compensate for the effects of activating (from a quiescent state) an output buffer driven by the VCO.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Applicant: Infineon Technologies AGInventors: Christian Grewing, Stefan Heinrich van Waasen, Emericks Anders
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Publication number: 20090021074Abstract: A power control system is described that reuses current from segregated circuits of the mobile device. In some embodiments, the segregated circuits (or “sections”) can be “stacked” in series (with respect to the power supply) such that power is more efficiently used. The power can be more efficiently used by arranging a first section to reuse current that supplies power to a second section.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Applicant: Infineon Technologies AGInventors: Christian Grewing, Stefan Heinrich van Waasen
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Patent number: 7450913Abstract: Circuit arrangement for a wideband mixer (1, 101, 201) with a multiplicative mixing stage (2) which exhibits a carrier frequency input (3, 4) for coupling in a differential carrier frequency signal (LOP, LON), a mixing stage input (5, 6) for coupling in a predistorted differential input signal (LFPD, LFND), and an output (9, 10) for coupling out a differential output signal (OUTP, OUTN) which is generated from the differential carrier frequency signal (LOP, LON) and the predistorted differential input signal (LFPD, LFND) by multiplicative mixing, the predistorted differential input signal (LFPD, LFND) being generated from a differential input signal (LFP, LFN) by means of a quadratic predistortion and a linear predistortion.Type: GrantFiled: April 21, 2005Date of Patent: November 11, 2008Assignee: Infineon Technologies AGInventors: Martin Friedrich, Christian Grewing, Giuseppe Li Puma, Christoph Sandner, Andreas Wiesbauer, Kay Winterberg, Stefan Van Waasen
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Publication number: 20080231363Abstract: The invention relates to an differential amplifier circuit comprising an amplifier stage comprising a first and a second transistor, the gates of which are connected to differential input terminals of the amplifier stage. The differential amplifier further comprises a temperature compensation circuit comprising a third and fourth transistor. The third transistor is connected to the source of the first transistor and the fourth transistor is connected to the source of the second transistor. Further, the temperature compensation circuit comprises a constant current source connected to the respective sources of the third and fourth transistors. Thereby the temperature compensation circuit is arranged to provide a feedback resistance in dependence on the operating temperature so as to compensate for variations of the resistance of the first and second transistors.Type: ApplicationFiled: April 18, 2007Publication date: September 25, 2008Applicant: Infineon Technologies AGInventors: Christian Grewing, Detlev Theil, Stefan Van Waasen
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Patent number: 7317768Abstract: The invention relates to a demodulator and also a demodulation method and enables a reliable demodulation even when the intermediate frequency range overlaps the range of the data frequencies of the signal. For this purpose, a rapidly oscillating output signal is generated from the in-phase signal and also the quadrature signal, the sign of which output signal varies in a manner dependent on the product of the signs of the in-phase signal and of the quadrature signal. Either an XOR gate or a multiplier stage may be used in order to generate an output signal of this type.Type: GrantFiled: June 7, 2002Date of Patent: January 8, 2008Assignee: Infineon Technologies AGInventors: Christian Grewing, Markus Hammes, André Hanke, Stefan Van Waasen
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Publication number: 20070257712Abstract: The invention relates to an input buffer amplifier suitable for a system on chip (SoC) device. The input buffer amplifier has a single ended input and a differential output. The input terminal is connected to a first differential stage having two transistors and to a second differential stage having two transistors. The first and second differential stages are further connected to a first and second load, for example, current mirrors being connected so as to provide a differential output at the output terminals.Type: ApplicationFiled: May 2, 2007Publication date: November 8, 2007Inventors: Wenche Einerman, Christian Grewing
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Patent number: 7271657Abstract: A traveling wave amplifier comprises a first normally off MOS transistor having a drain, source and gate terminal. The drain terminal is connected to a node of a drain line, which is connected to a first supply voltage potential via a connecting resistor. The gate terminal is connected to a node of a gate line, onto which an input signal is coupled. The source terminal is coupled to a second supply voltage potential via a first resistor. The traveling wave amplifier also comprises at least one second normally off MOS transistor. In addition, the traveling wave amplifier further comprises a normally off bias MOS transistor. The normally off bias MOS transistor forms a current mirror with at least one of the second normally off MOS transistors. An output signal of the traveling wave amplifier is tapped off on the drain line.Type: GrantFiled: April 29, 2005Date of Patent: September 18, 2007Assignee: Infineon Technologies AGInventors: Martin Friedrich, Christian Grewing, Giuseppe Li Puma, Christoph Sandner, Andreas Wiesbauer, Kay Winterberg, Stefan Van Waasen
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Patent number: 7242913Abstract: The invention is directed to a frequency conversion circuit arrangement a mobile radio containing such circuit which provide frequency conditioning with a frequency mixer. In this context, a feedback path from the output of the frequency mixer to a further input on the frequency mixer is provided which has a frequency divider. Particularly if the frequency divider is in the form of a divide-by-two frequency divider, the frequency conversion circuit exhibits low power and has a small chip area and permits the circuit to be operated without reaction on a frequency generator in order to actuate a frequency converter for a useful signal in a transceiver.Type: GrantFiled: September 10, 2004Date of Patent: July 10, 2007Assignee: Infineon Technologies AGInventors: Christian Grewing, André Hanke
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Patent number: 7239854Abstract: One or more aspects of the present invention are directed to a frequency-doubling circuit arrangement that doubles the frequency of a signal applied to its input, and presents that doubled frequency signal at its output. A rectifier that rectifies the input signal as a function of a reference variable is provided for coupling the input and output. A regulator is used to supply the reference variable to a control input of the rectifier. A control loop is designed so that even-numbered higher harmonics in the output signal disappear or are greatly suppressed. Since the frequency-doubling circuit described has a low power consumption in conjunction with a smaller chip area, it is particularly suitable for installation in mobile radios for conditioning carrier frequencies and local oscillator frequencies.Type: GrantFiled: September 14, 2004Date of Patent: July 3, 2007Assignee: Infineon Technologies AGInventors: Christian Grewing, André Hanke, Dietolf Seippel
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Patent number: 7180385Abstract: A transmission arrangement includes a step-up frequency mixer that converts a modulation signal to a transmission frequency. The step-up frequency mixer is arranged within a phase locked loop that further comprises a frequency divider that is likewise supplied with the modulation data, combined with channel pre-selection data, for the purposes of compensation. This arrangement prevents low-frequency components of the modulation signal from being eliminated by the phase locked loop. In addition, noise components and undesirable interference frequency components that are produced in the mixer are suppressed by the phase locked loop.Type: GrantFiled: September 13, 2004Date of Patent: February 20, 2007Assignee: Infineon Technologies AGInventors: Christian Grewing, Markus Hammes, André Hanke, Stefan Van Waasen