Patents by Inventor Debopriyo Chowdhury
Debopriyo Chowdhury 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: 10396716Abstract: An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.Type: GrantFiled: June 4, 2018Date of Patent: August 27, 2019Assignee: Avago Technologies International Sales Pte. LimitedInventors: Ali Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Mundlapudi
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Publication number: 20180287564Abstract: An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.Type: ApplicationFiled: June 4, 2018Publication date: October 4, 2018Applicant: Avago Technologies General IP (Singapore) Pte. Ltd .Inventors: Ali Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Mundlapudi
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Patent number: 10003303Abstract: An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.Type: GrantFiled: June 13, 2016Date of Patent: June 19, 2018Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.Inventors: Ali Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Reddy Mundlapudi
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Publication number: 20170279412Abstract: An amplifier may include control circuitry that may track a first input signal parameter and, in response, adjust a value of a second input parameter. Input parameter tracking and adjustment may facilitate control of output parameters for the amplifier. For example, an envelope-tracking amplifier may track input signal amplitude and adjust other input parameters in response. The adjustments may facilitate control of output parameters, such as gain or efficiency. The amplifier may further include calibration circuitry to determine adjustment responses to various tracked input parameters.Type: ApplicationFiled: June 13, 2016Publication date: September 28, 2017Inventors: Ali Afsahi, Debopriyo Chowdhury, Rethnakaran Pulikkoonattu, Sraavan Reddy Mundlapudi
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Patent number: 9614477Abstract: The present disclosure is directed to an envelope tracking supply modulator for multiple PAs. The envelope tracking supply modulator is configured to provide, for each of the multiple PAs, a separate supply voltage that is modulated based on the envelope of the respective RF input signal to the PA. Each of the modulated supply voltages is constructed from a DC component and an alternating current (AC) component. The DC component for each modulated supply voltage is generated by a main switching regulator that is shared by the multiple PAs. In one embodiment, the AC component for each modulated supply voltage is generated by an auxiliary switching regulator that is shared by the multiple PAs and a separate linear regulator for each of the multiple PAs. In another embodiment, the AC component for each modulated supply voltage is generated by a separate buffer.Type: GrantFiled: January 29, 2016Date of Patent: April 4, 2017Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Dmitriy Rozenblit, Tirdad Sowlati, Ali Afsahi, Debopriyo Chowdhury, Sraavan R. Mundlapudi, Morteza Vadipour
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Patent number: 9362866Abstract: A communication device, such as a smart phone, includes an envelope tracking power supply modulator. The envelope tracking power supply modulator receives an envelope tracking reference signal. A baseband controller pre-distorts the envelope tracking reference signal responsive to distortion caused by the envelope tracking power supply modulator. For instance, the pre-distortion may modify the nominal envelope tracking reference signal so that, after the modulator acts on the modified reference signal, the output of the modulator has increased linearity.Type: GrantFiled: December 9, 2013Date of Patent: June 7, 2016Assignee: Broadcom CorporationInventors: Debopriyo Chowdhury, Ali Afsahi
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Patent number: 9356512Abstract: A communication device, such as a smart phone, includes an envelope tracking power supply. The envelope tracking power supply is configured for direct connection to a supply voltage. The direct connection may be made without connection through an intermediate voltage regulator, such as a low drop out regulator. The supply voltage may be a relatively high battery voltage, for example, that would normally result in greater than permissible voltage limits on the transistors used in conventional envelope tracking power supplies.Type: GrantFiled: September 5, 2013Date of Patent: May 31, 2016Assignee: Broadcom CorporationInventors: Debopriyo Chowdhury, Ali Afsahi
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Publication number: 20150146819Abstract: A communication device, such as a smart phone, includes an envelope tracking power supply modulator. The envelope tracking power supply modulator receives an envelope tracking reference signal. A baseband controller pre-distorts the envelope tracking reference signal responsive to distortion caused by the envelope tracking power supply modulator. For instance, the pre-distortion may modify the nominal envelope tracking reference signal so that, after the modulator acts on the modified reference signal, the output of the modulator has increased linearity.Type: ApplicationFiled: December 9, 2013Publication date: May 28, 2015Applicant: Broadcom CorporationInventors: Debopriyo Chowdhury, Ali Afsahi
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Publication number: 20150028829Abstract: A communication device, such as a smart phone, includes an envelope tracking power supply. The envelope tracking power supply is configured for direct connection to a supply voltage. The direct connection may be made without connection through an intermediate voltage regulator, such as a low drop out regulator. The supply voltage may be a relatively high battery voltage, for example, that would normally result in greater than permissible voltage limits on the transistors used in conventional envelope tracking power supplies.Type: ApplicationFiled: September 5, 2013Publication date: January 29, 2015Applicant: Broadcom CorporationInventors: Debopriyo Chowdhury, Ali Afsahi
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Patent number: 8665016Abstract: A power amplifier includes generation, tracking and usage of an envelope of an input RF signal. To improve upon the efficiency of the power amplifier, various configurations include using the tracked envelope, for example, an OFDM signal, to improve the average efficiency. Suitable hardware/software in the form of circuitry, logic gates, and/or code functions to generate and track an envelope of an input RF signal and modulate one or more of the input supply voltage, cascode gate bias or parallel PA branches using the tracked envelope.Type: GrantFiled: June 27, 2012Date of Patent: March 4, 2014Assignee: Broadcom CorporationInventors: Debopriyo Chowdhury, Ali Afsahi
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Publication number: 20130285750Abstract: A power amplifier includes generation, tracking and usage of an envelope of an input RF signal. To improve upon the efficiency of the power amplifier, various configurations include using the tracked envelope, for example, an OFDM signal, to improve the average efficiency. Suitable hardware/software in the form of circuitry, logic gates, and/or code functions to generate and track an envelope of an input RF signal and modulate one or more of the input supply voltage, cascode gate bias or parallel PA branches using the tracked envelope.Type: ApplicationFiled: June 27, 2012Publication date: October 31, 2013Applicant: BROADCOM CORPORATIONInventors: Debopriyo Chowdhury, Ali Afsahi