Patents by Inventor Mohammad Nariman
Mohammad Nariman 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: 8145146Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.Type: GrantFiled: May 28, 2010Date of Patent: March 27, 2012Assignee: Broadcom CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
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Publication number: 20100240328Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.Type: ApplicationFiled: May 28, 2010Publication date: September 23, 2010Applicant: BROADCOM CORPORATIONInventors: Mohammad NARIMAN, Alireza ZOLFAGHARI, Hooman DARABI
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Patent number: 7737872Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.Type: GrantFiled: June 20, 2008Date of Patent: June 15, 2010Assignee: Broadcom CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
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Patent number: 7734258Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.Type: GrantFiled: December 13, 2006Date of Patent: June 8, 2010Assignee: Broadcom CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
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Patent number: 7583941Abstract: A technique to adjust gain and DC level of current DAC signals with offset to generate a voltage signal that is used to control power level of a power amplifier. One or more current mirrors from a set of current mirrors is programmably selected to set gain of a current-to-voltage conversion stage. A second set of current mirrors used to adjust DC level current is oppositely tracked to the current mirrors used for the gain. The opposite tracking allows for deactivation (or activation) of respective current mirrors in the second set in response to activation (or deactivation) of respective gain setting current mirrors to maintain a substantially constant DC level when gain values are changed. An additional set of current mirrors allows for independent compensation of DC offsets.Type: GrantFiled: December 20, 2006Date of Patent: September 1, 2009Assignee: Broadcom CorporationInventor: Mohammad Nariman
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Patent number: 7463176Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.Type: GrantFiled: December 13, 2006Date of Patent: December 9, 2008Assignee: Broadcom CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
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Publication number: 20080284629Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.Type: ApplicationFiled: June 20, 2008Publication date: November 20, 2008Applicant: BROADCOM CORPORATIONInventors: MOHAMMAD NARIMAN, ALIREZA ZOLFAGHARI, HOOMAN DARABI
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Publication number: 20080153439Abstract: A technique to adjust gain and DC level of current DAC signals with offset to generate a voltage signal that is used to control power level of a power amplifier. One or more current mirrors from a set of current mirrors is programmably selected to set gain of a current-to-voltage conversion stage. A second set of current mirrors used to adjust DC level current is oppositely tracked to the current mirrors used for the gain. The opposite tracking allows for deactivation (or activation) of respective current mirrors in the second set in response to activation (or deactivation) of respective gain setting current mirrors to maintain a substantially constant DC level when gain values are changed. An additional set of current mirrors allows for independent compensation of DC offsets.Type: ApplicationFiled: December 20, 2006Publication date: June 26, 2008Applicant: Broadcom Corporation, a California CorporationInventor: Mohammad Nariman
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Publication number: 20080146173Abstract: A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.Type: ApplicationFiled: December 13, 2006Publication date: June 19, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
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Publication number: 20080146170Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.Type: ApplicationFiled: December 13, 2006Publication date: June 19, 2008Applicant: Broadcom Corporation, a California CorporationInventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi