Patents by Inventor Christopher Weigand

Christopher Weigand 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).

  • Publication number: 20130200919
    Abstract: A method is provided for determining at least one operating parameter of a thermoelectric system in a vehicle, wherein the thermoelectric system comprises an energy conversion device having at least one photovoltaic element for converting thermal radiation, which is emitted by a heat source of the vehicle, into electrical energy. The method includes measuring an electrical power of the photovoltaic device, and determining an operating parameter of the thermoelectric system based on the measured electrical power of the photovoltaic device.
    Type: Application
    Filed: July 29, 2011
    Publication date: August 8, 2013
    Inventors: Joris Fokkelman, Karsten Hofmann, Martin Böld, Christoph Weigand
  • Patent number: 7990201
    Abstract: Various embodiments are directed to providing constant phase digital attenuation. In one embodiment, a digital attenuator circuit (100) comprises an input node (102) to receive an input signal to be attenuated, an output node (104) to output an attenuated signal, a reference loss path (106) between the input node (102) and the output node (104), and an attenuation path (108) between the input node (102) and the output node (104). The reference loss path (106) comprises switching elements and matching circuitry to improve Voltage Standing Wave Ratio (VSWR), and the attenuation path (108) comprises switching elements and attenuating circuitry to attenuate the input signal when the digital attenuator circuit (100) is switched from a reference loss state to an attenuation state. An effective phase length of the reference loss path (106) and an effective phase length of the attenuation path (108) may be equalized to provide a constant phase when the digital attenuator circuit (100) is switched between states.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: August 2, 2011
    Assignee: M/A-COM Technology Solutions Holdings Inc.
    Inventors: Wen Hui Zhang, Christopher Weigand
  • Publication number: 20100171541
    Abstract: Various embodiments are directed to providing constant phase digital attenuation. In one embodiment, a digital attenuator circuit (100) comprises an input node (102) to receive an input signal to be attenuated, an output node (104) to output an attenuated signal, a reference loss path (106) between the input node (102) and the output node (104), and an attenuation path (108) between the input node (102) and the output node (104). The reference loss path (106) comprises switching elements and matching circuitry to improve Voltage Standing Wave Ratio (VSWR), and the attenuation path (108) comprises switching elements and attenuating circuitry to attenuate the input signal when the digital attenuator circuit (100) is switched from a reference loss state to an attenuation state. An effective phase length of the reference loss path (106) and an effective phase length of the attenuation path (108) may be equalized to provide a constant phase when the digital attenuator circuit (100) is switched between states.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 8, 2010
    Inventors: Wen Hui Zhang, Christopher Weigand
  • Publication number: 20090079489
    Abstract: Various embodiments are directed to providing constant phase digital attenuation. In one embodiment, a digital attenuator circuit comprises an input node to receive an input signal to be attenuated, an output node to output an attenuated signal, a reference loss path between the input node and the output node, and an attenuation path between the input node and the output node. The reference loss path comprises switching elements and matching circuitry to improve Voltage Standing Wave Ratio (VSWR), and the attenuation path comprises switching elements and attenuating circuitry to attenuate the input signal when the digital attenuator circuit is switched from a reference loss state to an attenuation state. An effective phase length of the reference loss path and an effective phase length of the attenuation path may be equalized to provide a constant phase when the digital attenuator circuit is switched between states. Other embodiments are described and claimed.
    Type: Application
    Filed: September 21, 2007
    Publication date: March 26, 2009
    Applicant: M/A-COM, INC.
    Inventors: Wen Hui Zhang, Christopher Weigand
  • Publication number: 20070075783
    Abstract: An apparatus and method for transmitting signal, the apparatus comprising a front end telecommunications module including a power amplifier, a matching circuit coupled to the power amplifier, and a filter coupled to the matching circuit, such that a signal received by the power amplifier is transmitted to the filter through the matching circuit. The telecommunications module provides quad-band capability in a compact design.
    Type: Application
    Filed: December 8, 2006
    Publication date: April 5, 2007
    Applicant: M/A Com, Inc.
    Inventors: Christopher Weigand, Thomas Winslow, Richard Giacchino
  • Publication number: 20050282503
    Abstract: A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with capacitive shunt arms. The capacitance of a shunt arm may be provided by two or more parallel paths, each having a capacitor and an inductor in series so that, in addition to providing the effective capacitance necessary for impedance matching at the fundamental frequency, two separate harmonics represented by the series resonances of the parallel paths are rejected. In this manner, an extra null in the circuit's stop-band may be achieved using the same number of shunt elements necessary to achieve impedance matching at the fundamental frequency.
    Type: Application
    Filed: June 21, 2004
    Publication date: December 22, 2005
    Applicant: M/A-Com, Inc.
    Inventors: Peter Onno, Rajanish, Nitin Jain, Christopher Weigand
  • Publication number: 20050227643
    Abstract: An apparatus and method for detecting radio frequency transmit power levels produced by a power amplifier of a wireless device is described. In one exemplary apparatus implementation, the apparatus includes a power amplifier, an antenna switch and a power amplifier detector. The power amplifier is configured to amplify a transmit signal at a desired power level. An antenna switch, is located between the power amplifier and an antenna, and is configured to switch the antenna from a receive mode to a transmit mode and vice versa. A power amplifier detector is connected to the antenna switch. The power amplifier detector is configured to receive a leakage signal from the antenna switch as a basis to detect the power level of the transmit signal.
    Type: Application
    Filed: June 15, 2004
    Publication date: October 13, 2005
    Applicant: M/A-Com, Inc.
    Inventors: Christopher Brindle, Norbert Schmitz, Christopher Weigand
  • Patent number: D626765
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: November 9, 2010
    Assignee: American Greetings Corporation
    Inventors: Christopher Weigand, Gary Hodge, Emory Brozak, Jr.
  • Patent number: D627580
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: November 23, 2010
    Assignee: American Greetings Corporation
    Inventors: Christopher Weigand, Gary Hodge, Emory Brozak, Jr.
  • Patent number: D679922
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: April 16, 2013
    Assignee: American Greetings Corporation
    Inventor: Christopher Weigand