Patents by Inventor Nasserullah Khan
Nasserullah Khan 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: 20130005286Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan
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Publication number: 20120329411Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: September 5, 2012Publication date: December 27, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen CHAN, Nasserullah KHAN, Qingzhong JIAO, Xin JIN, Michael HABICHER, Nagula Tharma SANGARY
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Patent number: 8295397Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: GrantFiled: May 21, 2010Date of Patent: October 23, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 8295792Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: GrantFiled: January 17, 2012Date of Patent: October 23, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 8295403Abstract: A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode.Type: GrantFiled: January 30, 2009Date of Patent: October 23, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen M. Chan, Xin Jin, Qingzhong Jiao, Nasserullah Khan, Nagula Tharma Sangary
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Patent number: 8290085Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: GrantFiled: July 28, 2011Date of Patent: October 16, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher, Qingzhong Jiao
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Publication number: 20120220242Abstract: A stage is provided for a receiver of a wireless device. The stage comprises a matching network that separates amplified signals of interest received from an amplifier from amplified unwanted signals received from the amplifier in conjunction with additional downstream filters. The stage also comprises a signal path that comprises components for receiving and processing the amplified signals of interest, and a shunt path that comprises components for adjusting reflected energy sent back to the amplifier for limiting the output swing of the amplifier in a frequency band corresponding to the amplified unwanted signals.Type: ApplicationFiled: May 3, 2012Publication date: August 30, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 8190113Abstract: A stage is provided for a receiver of a wireless device. The stage comprises a matching network that separates amplified signals of interest received from an amplifier from amplified unwanted signals received from the amplifier in conjunction with additional downstream filters. The stage also comprises a signal path that comprises components for receiving and processing the amplified signals of interest, and a shunt path that comprises components for adjusting reflected energy sent back to the amplifier for limiting the output swing of the amplifier in a frequency band corresponding to the amplified unwanted signals.Type: GrantFiled: August 27, 2008Date of Patent: May 29, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Publication number: 20120122411Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: ApplicationFiled: January 17, 2012Publication date: May 17, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 8160517Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: GrantFiled: May 21, 2010Date of Patent: April 17, 2012Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Publication number: 20120021704Abstract: Various embodiments described herein relate to a power management block and one or more amplification blocks used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier, both of which are included in a selected one of the amplification blocks. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take 1n into account various characteristics of the transmitter components and control values. Post power amplifier transmission power is detected for input into the one or more feedback loops executed in the power management block. A controller for the power amplifier is design to stabilize the system with respect to gain expansion in the power amplifier.Type: ApplicationFiled: July 23, 2010Publication date: January 26, 2012Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Ian Ka Yin Chung, Hamza Mohaimeen Bari
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Publication number: 20110319124Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: July 28, 2011Publication date: December 29, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Patent number: 8000409Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: GrantFiled: July 30, 2010Date of Patent: August 16, 2011Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Publication number: 20110130105Abstract: A transmitter for a mobile device utilizes at least one mapper in order to improve power efficiency while still meeting out of band spurious emissions and waveform quality requirements. An encoder and modulator generates an encoded and modulated transmit signal from an input signal. A digital to analog converter coupled to the encoder and modulator generates an analog representation of the encoded and modulated transmit signal. An amplifier stage coupled to the digital to analog converter amplifies the analog representation of the encoded and modulated transmit signal to generate a transmission signal. The transmitter further comprises an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage. At least one mapper is provided in the amplifier control block, used to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal.Type: ApplicationFiled: May 21, 2010Publication date: June 2, 2011Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Xin Jin, Qingzhong Jiao
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Patent number: 7907920Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: GrantFiled: June 14, 2007Date of Patent: March 15, 2011Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 7873119Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: GrantFiled: June 14, 2007Date of Patent: January 18, 2011Assignee: Research In Motion LimitedInventors: Wen-Yen Chan, Nasserullah Khan
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Patent number: 7869776Abstract: A method and apparatus for regulating Tx power in a multi-rate mobile device transmitter containing signal dependent gain stages. A data rate and signal format indicator signal corresponding to the transmitted signal, and a desired reference power signal are fed to a mapper that outputs a calibration value based on the desired reference power level at the antenna. The calibration value controls the power amplifier gain characteristics in real time.Type: GrantFiled: June 3, 2009Date of Patent: January 11, 2011Assignee: Research In Motion LimitedInventors: Xin Jin, Nagula T. Sangary, Muhammad Khaledul Islam, Wen Zhao, Nasserullah Khan, Wen-Yen Chan, Qing Zhong Jiao
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Publication number: 20100291887Abstract: A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.Type: ApplicationFiled: July 30, 2010Publication date: November 18, 2010Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan, Qingzhong Jiao, Xin Jin, Nagula Tharma Sangary, Michael Franz Habicher
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Publication number: 20100233978Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: ApplicationFiled: May 21, 2010Publication date: September 16, 2010Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan
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Publication number: 20100227578Abstract: Various embodiments described herein relate to a power management block and an amplification block used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier which are both in the amplification block. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values.Type: ApplicationFiled: May 21, 2010Publication date: September 9, 2010Applicant: RESEARCH IN MOTION LIMITEDInventors: Wen-Yen Chan, Nasserullah Khan