Patents by Inventor Razieh Roufoogaran
Razieh Roufoogaran 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: 9408015Abstract: Systems and apparatuses are provided for negating the degradation effects of fundamental coupling between at least two near field communication (NFC) enabled devices, at least one of which can receive frequency modulation (FM) signals. Due to the fundamental coupling, strong NFC signals can mix with blocking signals associated with a desired/tuned-to FM frequency causing degradation in FM receiver performance. By utilizing a notch filter at the front end of the FM receiver, the degradation in FM receiver performance caused by the fundamental coupling phenomenon can be avoided.Type: GrantFiled: May 24, 2013Date of Patent: August 2, 2016Assignee: Broadcom CorporationInventors: Shahla Khorram, Fazal Haq, Thomas Francis Baker, Bojko Frederik Marholev, Razieh Roufoogaran
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Patent number: 8977315Abstract: Certain aspects of a method and system for a compact and power efficient local oscillator generation architecture in multi-standard systems may include selection of an input frequency range of operation at a voltage controlled oscillator (VCO) based on a particular wireless band of operation. An image rejection mixer may be enabled to mix a plurality of generated local oscillator signals. An inductive buffer may be enabled to generate an output signal by buffering the mixed plurality of generated local oscillator signals in a single backend stage. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing an RC-CR quadrature network.Type: GrantFiled: May 25, 2007Date of Patent: March 10, 2015Assignee: Broadcom CorporationInventors: Razieh Roufoogaran, Qiang Li, Arya Behzad
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Publication number: 20140329462Abstract: Systems and apparatuses are provided for negating the degradation effects of fundamental coupling between at least two near field communication (NFC) enabled devices, at least one of which can receive frequency modulation (FM) signals. Due to the fundamental coupling, strong NFC signals can mix with blocking signals associated with a desired/tuned-to FM frequency causing degradation in FM receiver performance. By utilizing a notch filter at the front end of the FM receiver, the degradation in FM receiver performance caused by the fundamental coupling phenomenon can be avoided.Type: ApplicationFiled: May 24, 2013Publication date: November 6, 2014Applicant: Broadcom CorporationInventors: Shahla Khorram, Fazal Haq, Thomas Francis Baker, Bojko Frederik Marholev, Razieh Roufoogaran
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Patent number: 8676139Abstract: Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of operation in a system that handles a first wireless communication protocol and a second wireless communication protocol. An image rejection mixer may be enabled to generate an output signal for the particular wireless band of operation based on mixing a plurality of received signals within a selected frequency range. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing a RC-CR quadrature network.Type: GrantFiled: January 11, 2011Date of Patent: March 18, 2014Assignee: Broadcom CorporationInventors: Qiang Li, Razieh Roufoogaran, Arya Behzad, Dandan Li, Hung-Ming Chien
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Patent number: 8600315Abstract: Methods and systems for a configurable front end are disclosed. Aspects of one method may include a transceiver on a single chip that may comprise a power amplifier (PA) and a low noise amplifier (LNA). The PA may amplify signals to be transmitted over a range of output transmit power. An upper limit for a power range may of substantially 12 dBm. The LNA may be tolerant to PA signals by, for example, being configured to follow signal voltages generated from an output of the power amplifier. For example, each input transistor of the LNA may be isolated from other transistors in the LNA. Accordingly, the input transistors may float since they may not be tied to a voltage level via other transistors. This may allow the input transistors to avoid damage. The transceiver may also be configured for differential RF input, differential RF output, single-ended RF input, and/or single-ended RF output.Type: GrantFiled: May 29, 2007Date of Patent: December 3, 2013Assignee: Broadcom CorporationInventors: Razieh Roufoogaran, Iqbal Bhatti
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Publication number: 20120302181Abstract: A radio front end includes a transformer and an adjustable load. The transformer includes a first winding and a second winding, wherein the first winding is operably coupled to an antenna and the second winding coupled to at least one of a power amplifier and a low noise amplifier. The adjustable load is operably coupled to the second winding, wherein the adjustable load provides a first impedance based on a first impedance selection signal when the radio front end is in a transmit mode and provides a second impedance based on a second impedance selection signal when the radio front end is in a receive module such that impedance at the first winding is substantially similar in the transmit mode and in the receive mode.Type: ApplicationFiled: August 10, 2012Publication date: November 29, 2012Applicant: BROADCOM CORPORATIONInventors: Razieh Roufoogaran, Jesus Alfonso Castaneda
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Patent number: 8270926Abstract: A radio front end includes a transformer and an adjustable load. The transformer includes a first winding and a second winding, wherein the first winding is operably coupled to an antenna and the second winding coupled to at least one of a power amplifier and a low noise amplifier. The adjustable load is operably coupled to the second winding, wherein the adjustable load provides a first impedance based on a first impedance selection signal when the radio front end is in a transmit mode and provides a second impedance based on a second impedance selection signal when the radio front end is in a receive module such that impedance at the first winding is substantially similar in the transmit mode and in the receive mode.Type: GrantFiled: March 16, 2004Date of Patent: September 18, 2012Assignee: Broadcom CorporationInventors: Razieh Roufoogaran, Jesus Alfonso Castaneda
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Publication number: 20120231752Abstract: Methods and systems for a configurable front end are disclosed. Aspects of one method may include a transceiver on a single chip that may comprise a power amplifier (PA) and a low noise amplifier (LNA). The PA may amplify signals to be transmitted over a range of output transmit power. An upper limit for a power range may of substantially 12 dBm. The LNA may be tolerant to PA signals by, for example, being configured to follow signal voltages generated from an output of the power amplifier. For example, each input transistor of the LNA may be isolated from other transistors in the LNA. Accordingly, the input transistors may float since they may not be tied to a voltage level via other transistors. This may allow the input transistors to avoid damage. The transceiver may also be configured for differential RF input, differential RF output, single-ended RF input, and/or single-ended RF output.Type: ApplicationFiled: May 29, 2007Publication date: September 13, 2012Inventors: Razieh Roufoogaran, Iqbal Bhatti
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Patent number: 8102953Abstract: A method and system for calibrating a plurality of modules in a communication system is provided. The method may include selecting a plurality of modules with at least one output signal and calibrating an amplitude of each selected module to be within a specified range if the amplitude is out of the specified range via a gain control processing circuit of the selected module, wherein the plurality of modules may be calibrated in an order starting with a first module located at an input of a signal path and ending with a module located at an output of the signal path. The DC component and amplitude of the envelope of the output signal may be detected by circuitry within the selected module. Muxes may be utilized to route the DC component and amplitude of the envelope to a feedback control processing circuit.Type: GrantFiled: December 29, 2006Date of Patent: January 24, 2012Assignee: Broadcom CorporationInventors: Razieh Roufoogaran, Arya Behzad, Qiang Li
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Patent number: 8073080Abstract: Certain aspects of a method and system for RC-CR quadrature generation with wideband coverage and process compensation may include determining an amplitude mismatch between an in-phase (I) component and a quadrature (Q) component of a signal generated in a radio frequency (RF) transmitter or receiver. A variation in resistance of a quadrature network associated with the I component and Q component may be determined. The determined amplitude mismatch and the determined variation in the resistance of the quadrature network may be compensated by adjusting a resistance of a portion of the quadrature network associated with the I component and a resistance of a portion of the quadrature network associated with the Q component.Type: GrantFiled: December 29, 2006Date of Patent: December 6, 2011Assignee: Broadcom CorporationInventors: Qiang Li, Razieh Roufoogaran, Keith Carter, Arya Behzad
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Patent number: 8036316Abstract: Certain aspects of a method and system for independent in-phase (I) and quadrature (Q) loop amplitude control for quadrature generators may include determining an amplitude voltage associated with an in-phase (I) component and a quadrature (Q) component of a generated signal. A DC reference voltage associated with the I component and the Q component may be determined. The determined amplitude voltage may be compared with the determined reference voltage to generate a control signal. The amplitude mismatch between the I component and the Q component may be compensated by controlling a biasing current of one or more programmable buffers associated with one or both of the I component and the Q component, based on the generated control signal.Type: GrantFiled: December 7, 2009Date of Patent: October 11, 2011Assignee: Broadcom CorporationInventors: Arya Behzad, Qiang Li, Razieh Roufoogaran
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Publication number: 20110215880Abstract: Methods and systems for a flip chip configurable RF front end with an off-chip balun may include bonding a balun package to a single integrated circuit (IC) comprising an integrated transmitter and a receiver. The balun package may comprise one or more layers and may be electrically coupled to the IC. The balun package may comprise various devices such as, for example, inductors, capacitors, resistors, and/or switches, which may be on an exterior surface and/or inner layers of the balun package. Accordingly, the balun package and/or the IC may be configured for receiving RF signals and/or transmitting RF signals. The balun package and/or the IC may also be configured for single-ended RF input, single-ended RF output, differential RF input, and/or differential RF output. An off-chip amplifier may be used to amplify signals on the single transmit line in the single-ended RF output mode of operation.Type: ApplicationFiled: May 17, 2011Publication date: September 8, 2011Inventor: Razieh Roufoogaran
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Patent number: 7944322Abstract: Methods and systems for a flip chip configurable RF front end with an off-chip balun may include bonding a balun package to a single integrated circuit (IC) comprising an integrated transmitter and a receiver. The balun package may comprise one or more layers and may be electrically coupled to the IC. The balun package may comprise various devices such as, for example, inductors, capacitors, resistors, and/or switches, which may be on an exterior surface and/or inner layers of the balun package. Accordingly, the balun package and/or the IC may be configured for receiving RF signals and/or transmitting RF signals. The balun package and/or the IC may also be configured for single-ended RF input, single-ended RF output, differential RF input, and/or differential RF output. An off-chip amplifier may be used to amplify signals on the single transmit line in the single-ended RF output mode of operation.Type: GrantFiled: April 30, 2008Date of Patent: May 17, 2011Assignee: Broadcom CorporationInventor: Razieh Roufoogaran
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Publication number: 20110103526Abstract: Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of operation in a system that handles a first wireless communication protocol and a second wireless communication protocol. An image rejection mixer may be enabled to generate an output signal for the particular wireless band of operation based on mixing a plurality of received signals within a selected frequency range. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing a RC-CR quadrature network.Type: ApplicationFiled: January 11, 2011Publication date: May 5, 2011Inventors: Qiang Li, Razieh Roufoogaran, Arya Behzad, Dandan Li, Hung-Ming Chien
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Publication number: 20110051868Abstract: A receiver within a wireless device is able to couple to different antennas with different impedances. The wireless device includes a first antenna pin for coupling to a first antenna with a first impedance, a second antenna pin for coupling to a second antenna with a second impedance and a switch for selecting at least one of the first antenna and the second antenna to couple to the receiver.Type: ApplicationFiled: September 1, 2009Publication date: March 3, 2011Applicant: BROADCOM CORPORATIONInventors: Razieh Roufoogaran, Bojko F. Marholev
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Patent number: 7869781Abstract: Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of operation in a system that handles a first wireless communication protocol and a second wireless communication protocol. An image rejection mixer may be enabled to generate an output signal for the particular wireless band of operation based on mixing a plurality of received signals within a selected frequency range. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing a RC-CR quadrature network.Type: GrantFiled: December 29, 2006Date of Patent: January 11, 2011Assignee: Broadcom CorporationInventors: Qiang Li, Razieh Roufoogaran, Arya Behzad, Dandan Li, Hung-Ming Chien
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Publication number: 20100080325Abstract: Certain aspects of a method and system for independent in-phase (I) and quadrature (Q) loop amplitude control for quadrature generators may include determining an amplitude voltage associated with an in-phase (I) component and a quadrature (Q) component of a generated signal. A DC reference voltage associated with the I component and the Q component may be determined. The determined amplitude voltage may be compared with the determined reference voltage to generate a control signal. The amplitude mismatch between the I component and the Q component may be compensated by controlling a biasing current of one or more programmable buffers associated with one or both of the I component and the Q component, based on the generated control signal.Type: ApplicationFiled: December 7, 2009Publication date: April 1, 2010Inventors: Arya Behzad, Qiang Li, Razieh Roufoogaran
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Patent number: 7634027Abstract: Certain aspects of a method and system for independent in-phase (I) and quadrature (Q) loop amplitude control for quadrature generators may include determining an amplitude voltage associated with an in-phase (I) component and a quadrature (Q) component of a generated signal. A DC reference voltage associated with the I component and the Q component may be determined. The determined amplitude voltage may be compared with the determined reference voltage to generate a control signal. The amplitude mismatch between the I component and the Q component may be compensated by controlling a biasing current of one or more programmable buffers associated with one or both of the I component and the Q component, based on the generated control signal.Type: GrantFiled: December 29, 2006Date of Patent: December 15, 2009Assignee: Broadcom CorporationInventors: Arya Behzad, Qiang Li, Razieh Roufoogaran
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Publication number: 20090275295Abstract: Methods and systems for a flip-chip RF front end with switchable power amplifier. Aspects of one method may include controlling at least one MEMS switch to allow an on-chip PA and/or an off-chip PA to amplify RF signals for transmission. The MEMS switch may be part of a device package that may be mounted above the flip-chip bonded integrated circuit (IC). Accordingly, various embodiments of the invention may enable controlling of switches to amplify the RF signals via the on-chip RF PA, and the off-chip PA may be bypassed if there is an off-chip RF PA. Various embodiments of the invention may enable controlling the switches to amplify the RF signals via an off-chip RF PA and bypassing an on-chip RF PA. Various embodiments of the invention may also enable controlling the switches to amplify the RF signals via an off-chip RF PA and an on-chip RF PA.Type: ApplicationFiled: April 30, 2008Publication date: November 5, 2009Inventor: Razieh Roufoogaran
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Publication number: 20090273411Abstract: Methods and systems for a flip chip configurable RF front end with an off-chip balun may include bonding a balun package to a single integrated circuit (IC) comprising an integrated transmitter and a receiver. The balun package may comprise one or more layers and may be electrically coupled to the IC. The balun package may comprise various devices such as, for example, inductors, capacitors, resistors, and/or switches, which may be on an exterior surface and/or inner layers of the balun package. Accordingly, the balun package and/or the IC may be configured for receiving RF signals and/or transmitting RF signals. The balun package and/or the IC may also be configured for single-ended RF input, single-ended RF output, differential RF input, and/or differential RF output. An off-chip amplifier may be used to amplify signals on the single transmit line in the single-ended RF output mode of operation.Type: ApplicationFiled: April 30, 2008Publication date: November 5, 2009Inventor: Razieh Roufoogaran