Patents by Inventor Meng Pan
Meng Pan 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: 8369798Abstract: A method and system for wireless communication is provided and may include generating a single analog quadrature signal in a chip including RF transmitters and receivers using a baseband processor, and generating output RF signals based on the quadrature signal in corresponding RF transmitters. The output RF signals may be communicated to the RF receivers via a feedback path including circuitry external to the RF receivers. The dedicated circuitry may include a transmit/receive switch and/or an on-chip or off-chip balun. The quadrature signal may include in-phase and quadrature-phase components. The output RF signal communicated via the feedback path may be down-converted utilizing mixers in the RF receivers and communicated to the baseband processor. Distortion in the quadrature signal may be estimated utilizing the communicated down-converted output RF signals and subsequently generated quadrature signals may be predistorted based on the distortion estimation.Type: GrantFiled: February 21, 2011Date of Patent: February 5, 2013Assignee: Broadcom CorporationInventors: Meng-An Pan, Ali Afsahi, Vikram Magoon, Arya Behzad
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Patent number: 8364100Abstract: Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.Type: GrantFiled: June 3, 2010Date of Patent: January 29, 2013Assignee: Broadcom CorporationInventor: Meng-An Pan
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Patent number: 8244193Abstract: A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator implements a non-linear modulation scheme during a second mode of the modulator to produce a constant envelope modulated signal. The amplifier is biased as a linear amplifier during the first mode of the modulator and is biased as a non-linear amplifier during the second mode of the modulator. A feed-forward connection between the dual mode modulator and the amplifier is used to indicate a change in modulation mode and to adjust the bias of the amplifier. A power of the constant envelope modulated signal is increased such that an operating point of the amplifier remains substantially constant during the first and second modes of the modulator.Type: GrantFiled: January 5, 2009Date of Patent: August 14, 2012Assignee: Broadcom CorporationInventor: Meng-An Pan
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Patent number: 8219046Abstract: A RF transmitter is operable to transmit a signal at a frequency specified by the Bluetooth protocol. A passive upconversion mixer, which comprises a pair of MOSFET switches, is utilized inside the RF transmitter. The passive upconversion mixer is operable to receive analog local oscillator (LO) signals to be utilized for controlling operation of each of the pair of MOSFET switches to transmit signals with maximum gain. A MOS threshold voltage VTH and a DC component of a received baseband signal, VBB—DC, are determined for each of the pair of MOSFET switches. The determined VTH and the determined VBB—DC of the received baseband signal are combined such as VTH+VBB—DC and compared with a DC component of the received LO signals, VLO—DC. The VLO—DC is set equal to VTH+VBB—DC, accordingly, to provide maximum gain from the passive upconversion mixer for signal transmission.Type: GrantFiled: June 3, 2009Date of Patent: July 10, 2012Assignee: Broadcom CorporationInventor: Meng-An Pan
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Patent number: 8116677Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: August 24, 2010Date of Patent: February 14, 2012Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Meng-An Pan, Hung-Ming Chien, Shahla Khorram, William T. Colleran, Jacob Rael, Masood Syed, Brima Ibrahim, Stephen Wu, Shervin Moloudi
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Patent number: 8101592Abstract: This invention is directed to a hexahydro-cyclooctyl pyrazole cannabinoid modulator compound of formula (I): and a method for use in treating, ameliorating or preventing a cannabinoid receptor mediated syndrome, disorder or disease.Type: GrantFiled: May 24, 2010Date of Patent: January 24, 2012Assignee: Janssen Pharmaceutica N.V.Inventors: Mingde Xie, Fina Liotta, Huajun Lu, Meng Pan, Michael P. Wachter
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Patent number: 8041294Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: June 26, 2009Date of Patent: October 18, 2011Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Brima Ibrahim, Jacob Rael, Shahla Khorram, Shervin Moloudi, Stephen Wu, Hooman Darabi, William T. Colleran, Ed Chien, Meng-An Pan
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Patent number: 8010073Abstract: A power amplifier for use in a transmitter enables linear in dB output power control capability with 2 dB step sizes.Type: GrantFiled: January 22, 2004Date of Patent: August 30, 2011Assignee: Broadcom CorporationInventors: Meng-An Pan, Bojko Marholev
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Publication number: 20110178148Abstract: This invention is directed to a cannabinoid modulator compound of formula (I): or a form thereof, and methods for use in treating, ameliorating or preventing a cannabinoid receptor mediated syndrome, disorder or disease.Type: ApplicationFiled: April 4, 2011Publication date: July 21, 2011Inventors: Mingde XIA, Meng Pan, Michael P. Wachter
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Publication number: 20110143791Abstract: A method and system for wireless communication is provided and may include generating a single analog quadrature signal in a chip including RF transmitters and receivers using a baseband processor, and generating output RF signals based on the quadrature signal in corresponding RF transmitters. The output RF signals may be communicated to the RF receivers via a feedback path including circuitry external to the RF receivers. The dedicated circuitry may include a transmit/receive switch and/or an on-chip or off-chip balun. The quadrature signal may include in-phase and quadrature-phase components. The output RF signal communicated via the feedback path may be down-converted utilizing mixers in the RF receivers and communicated to the baseband processor. Distortion in the quadrature signal may be estimated utilizing the communicated down-converted output RF signals and subsequently generated quadrature signals may be predistorted based on the distortion estimation.Type: ApplicationFiled: February 21, 2011Publication date: June 16, 2011Inventors: Meng-An Pan, Ali Afsahi, Vikram Magoon, Arya Behzad
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Patent number: 7943653Abstract: This invention is directed to a cannabinoid modulator compound of formula (I): or a form thereof, and methods for use in treating, ameliorating or preventing a cannabinoid receptor mediated syndrome, disorder or disease.Type: GrantFiled: August 11, 2008Date of Patent: May 17, 2011Assignee: Janssen Pharmaceutica N.V.Inventors: Mingde Xia, Meng Pan, Michael P. Wachter
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Publication number: 20110092168Abstract: A method and apparatus is disclosed to optimize one or more operational parameters of a communications transmitter to reduce undesirable noise and/or interference embedded within a transmitted communications signal resulting from one or more imperfections. A baseband processor selects one or more calibration signals to allow for optimization of one or more statistical parameters. A calibration module determines the one or more statistical parameters of the transmitted communications signal in response to the one or more calibration signals. The calibration module provides one or more compensation parameters indicative of the one or more statistical parameters to the baseband processor module. The baseband processor adjusts the one or more operational parameters of the communications transmitter in response to the one or more compensation parameters.Type: ApplicationFiled: October 21, 2009Publication date: April 21, 2011Applicant: Broadcom CorporationInventor: Meng-An Pan
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Patent number: 7907921Abstract: A method and apparatus are provided for enabling a transmitter to have a substantially linear magnitude response and a substantially linear phase response. The transmitter includes first and second power amplifier drivers (PADs) having respective first and second non-linear phase responses. The first non-linear phase response is based on a first bias applied to the first PAD, and the second non-linear phase response is based on a second bias applied to the second PAD. The first and second PADs are coupled in parallel to provide a combined substantially linear phase response. According to an embodiment, the first and second PADs have respective first and second average input capacitances. Signal swings about the first and second biases vary the respective first and second average input capacitances, which may be combined to provide a combined average input capacitance that is substantially insensitive to the signal swings about the first and second biases.Type: GrantFiled: June 15, 2009Date of Patent: March 15, 2011Assignee: Broadcom CorporationInventor: Meng-An Pan
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Patent number: 7904037Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: November 18, 2008Date of Patent: March 8, 2011Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Jacob Rael, Syed Masood, Brima Ibrahim, Hung-Ming Chien, Stephen Wu, Meng-An Pan
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Publication number: 20110053522Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: ApplicationFiled: August 24, 2010Publication date: March 3, 2011Applicant: BROADCOM CORPORATIONInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Meng-An Pan, Hung-Ming Chien, Shahla Khorram, William T. Colleran, Jacob Rael, Masood Syed, Brima Ibrahim, Stephen Wu, Shervin Moloudi
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Patent number: 7894780Abstract: Various aspect of a system for a linearized transmitter including a power amplifier may include at least one transconductance amplifier that enables generation of a single analog quadrature signal. Transmitter mixers may enable generation of a plurality of upconverted RF signals in a corresponding plurality of RF processing chains based on the generated single analog quadrature signal. In various embodiments of the invention, a gain stage, for example gain stage, may also be referred to as an RF processing chain. Power amplifier circuit may enable generation of a corresponding plurality of RF output signals within a wireless communication system based on the generated plurality of upconverted RF signals.Type: GrantFiled: June 13, 2007Date of Patent: February 22, 2011Assignee: Broadcom CorporationInventors: Meng-An Pan, Ali Afsahi, Vikram Magoon, Arya Behzad
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Patent number: 7860467Abstract: A circuit may be provided. The circuit may be a component of a dual mode transmitter such as a transmitter from the 802.11x family. The circuit may comprise an amplifier configured to provide amplification of a signal for transmission in either a first transmission mode or a second transmission mode, using power supplied from a power supply, the amplifier including at least one cascode transistor in series with at least one amplifying transistor. The circuit may further comprise a power controller configured to define an operating characteristic of the at least one cascode transistor, and thereby designate an amount of the power from the power supply that is used by the amplifier during the amplification, based on whether the amplifier is to be operated in the first transmission mode or the second transmission mode.Type: GrantFiled: August 29, 2006Date of Patent: December 28, 2010Assignee: Broadcom CorporationInventor: Meng-An Pan
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Publication number: 20100317633Abstract: This invention is directed to a hexahydro-cyclooctyl pyrazole cannabinoid modulator compound of formula (I): and a method for use in treating, ameliorating or preventing a cannabinoid receptor mediated syndrome, disorder or disease.Type: ApplicationFiled: August 26, 2010Publication date: December 16, 2010Inventors: Mingde Xia, Fina Liotta, Huajun Lu, Meng Pan, Michael P. Wachter, Mark J. Macielag
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Patent number: 7851498Abstract: This invention is directed to a hexahydro-cyclooctyl pyrazole cannabinoid modulator compound of formula (I): and a method for use in treating, ameliorating or preventing a cannabinoid receptor mediated syndrome, disorder or disease.Type: GrantFiled: September 22, 2006Date of Patent: December 14, 2010Assignee: Janssen Pharmaceutica NVInventors: Mingde Xia, Fina Liotta, Huajun Lu, Meng Pan, Michael P. Wachter
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Publication number: 20100311366Abstract: Methods and systems for a transmitter LOFT cancellation scheme that maintains IQ balance are disclosed. Aspects of one method may include providing current compensation to both differential inputs of a mixer for each of I and Q channels. An initial current compensation of X units may be provided, followed by subsequent compensation as needed. The initial compensation may be provided to each differential input of the mixers used for I and Q channels. The subsequent current compensation for the I channel may be independent of the subsequent current compensation for the Q channel. Subsequent current compensation to a first differential input for a mixer may be increased by Y units while decreasing current compensation to the second differential input of the mixer by Y units. In this manner, the DC common mode level for the mixer may remain the same at the initial DC compensation current of X units for both mixers.Type: ApplicationFiled: June 3, 2010Publication date: December 9, 2010Inventor: Meng-An Pan