Patents by Inventor Mahim Ranjan
Mahim Ranjan 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: 20210099140Abstract: An amplifier circuit includes an amplifier, a balun comprising a primary side having a primary inductance and a secondary side having a secondary inductance, the primary side coupled to an output of the amplifier, the secondary side coupled to a first output path of the amplifier circuit and a second output path of the amplifier circuit, a shunt inductance coupled to the first output path; and a compensating inductance in the balun, the compensating inductance coupled between a first node and a second node, the first node coupling the compensating inductance to the first output path, the second node coupling the secondary inductance to the compensating inductance.Type: ApplicationFiled: October 1, 2019Publication date: April 1, 2021Inventors: Muhammad HASSAN, Bhushan Shanti ASURI, Mahim RANJAN
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Patent number: 10727790Abstract: An output driver with programmable single-ended and differential outputs includes a first switch, a first output attenuator, and a programmable attenuator. The first switch is coupled in a shunt configuration to a first path of a differential output of a first amplifier. The first output attenuator is included in the first path and is coupled to the first switch in accordance with the shunt configuration. The programmable attenuator is included in a second path of the differential output of the first amplifier.Type: GrantFiled: April 26, 2018Date of Patent: July 28, 2020Assignee: QUALCOMM IncorporatedInventors: Andreea Balteanu, Mahim Ranjan
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Patent number: 10581389Abstract: A reconfigurable amplifier load includes a power supply node, a first inductor comprising a first terminal coupled to a first switch, and a second inductor comprising a first terminal coupled to a second switch. The reconfigurable amplifier load further includes a third inductor comprising a first terminal coupled to the first switch. The first switch is configured to selectively couple the first terminal of the third inductor to the power supply node. A fourth inductor comprising a first terminal coupled to the second switch. The second switch is configured to selectively couple the first terminal of the fourth inductor to the power supply node. At least one additional switch configured to selectively couple a second terminal of the first inductor or a second terminal of the second inductor or both the second terminal of the first inductor and the second terminal of the second inductor to the power supply node.Type: GrantFiled: September 28, 2018Date of Patent: March 3, 2020Assignee: QUALCOMM IncorporatedInventors: Andreea Balteanu, Karthikeya Aruppukottai Boominathan, Mahim Ranjan, Ning Yuan
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Publication number: 20190334483Abstract: An output driver with programmable single-ended and differential outputs includes a first switch, a first output attenuator, and a programmable attenuator. The first switch is coupled in a shunt configuration to a first path of a differential output of a first amplifier. The first output attenuator is included in the first path and is coupled to the first switch in accordance with the shunt configuration. The programmable attenuator is included in a second path of the differential output of the first amplifier.Type: ApplicationFiled: April 26, 2018Publication date: October 31, 2019Inventors: Andreea BALTEANU, Mahim RANJAN
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Patent number: 10348246Abstract: An apparatus is disclosed for mixer biasing with baseband filter common-mode voltage. In an example aspect, the apparatus includes a mixer, a baseband filter, and a bias circuit. The mixer has a mixer transistor that is coupled to a bias node and a baseband node. The baseband filter is coupled to the mixer via the baseband node. The baseband filter is configured to operate with a common-mode reference voltage that is associated with a common-mode voltage applied at the baseband node. The bias circuit is coupled to the baseband filter and the bias node. The bias circuit is configured to receive the common-mode reference voltage from the baseband filter and generate, at the bias node, a bias voltage for biasing the mixer transistor based on the common-mode reference voltage.Type: GrantFiled: January 4, 2018Date of Patent: July 9, 2019Assignee: QUALCOMM IncorporatedInventors: Ayush Mittal, Krishnaswamy Thiagarajan, Bhushan Shanti Asuri, Mahim Ranjan
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Patent number: 10348528Abstract: A system includes: a baseband phase generator configured to receive differential in-phase (I) and quadrature (Q) signals and configured to output N phase-shifted baseband signals, wherein N is greater than 4, further wherein the baseband phase generator comprises a plurality of notch filters configured to receive the I and Q signals; and an upconverter configured to receive the phase-shifted baseband signals, to perform mixing on the phase-shifted baseband signals, and to output a differential upconverted signal.Type: GrantFiled: March 29, 2017Date of Patent: July 9, 2019Assignee: QUALCOMM IncorporationInventors: Ayush Mittal, Bhushan Shanti Asuri, Krishnaswamy Thiagarajan, Sameer Vasantlal Vora, Mahim Ranjan
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Publication number: 20190207558Abstract: An apparatus is disclosed for mixer biasing with baseband filter common-mode voltage. In an example aspect, the apparatus includes a mixer, a baseband filter, and a bias circuit. The mixer has a mixer transistor that is coupled to a bias node and a baseband node. The baseband filter is coupled to the mixer via the baseband node. The baseband filter is configured to operate with a common-mode reference voltage that is associated with a common-mode voltage applied at the baseband node. The bias circuit is coupled to the baseband filter and the bias node. The bias circuit is configured to receive the common-mode reference voltage from the baseband filter and generate, at the bias node, a bias voltage for biasing the mixer transistor based on the common-mode reference voltage.Type: ApplicationFiled: January 4, 2018Publication date: July 4, 2019Inventors: Ayush MITTAL, Krishnaswamy THIAGARAJAN, Bhushan Shanti ASURI, Mahim RANJAN
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Patent number: 10141894Abstract: A circuit includes a first amplifier path comprising a first amplifier, MA, a second amplifier path comprising a cascode device and a second amplifier, MB, a node defined by a source of the cascode device and a drain of the second amplifier, MB, and a capacitance coupled between the node and a source of the second amplifier, MB.Type: GrantFiled: July 3, 2017Date of Patent: November 27, 2018Assignee: QUALCOMM IncorporatedInventors: Karthikeya Aruppukottai Boominathan, Krishnaswamy Thiagarajan, Mahim Ranjan
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Patent number: 10084463Abstract: A transceiver including: a reconfigurable circuit including a plurality of units including at least a converter, the converter including: a digital-to-analog converter (DAC); successive approximation register (SAR) logic configured to selectively couple to the DAC; and a plurality of switches configured to reconfigure the plurality of units of the reconfigurable circuit to operate the transceiver in a receive mode or transmit mode.Type: GrantFiled: January 24, 2017Date of Patent: September 25, 2018Assignee: QUALCOMM IncorporatedInventors: Haim Mendel Weissman, Mahim Ranjan
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Patent number: 10044381Abstract: Techniques for using a narrow filter located before a power amplifier to reduce interference in an adjacent frequency band are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes the narrow filter and the power amplifier. The narrow filter is for a first frequency band (e.g., Band 40) and has a first bandwidth that is more narrow than the first frequency band. The narrow filter receives and filters an input radio frequency (RF) signal and provides a filtered RF signal. The power amplifier receives and amplifies the filtered RF signal and provides an amplified RF signal. The apparatus may further include a full filter for the first frequency band and located after the power amplifier. The full filter receives and filters the amplified RF signal and provides an output RF signal when it is selected for use.Type: GrantFiled: August 13, 2012Date of Patent: August 7, 2018Assignee: QUALCOMM IncorporatedInventors: Mark Vernon Lane, Chang-Ho Lee, Christian Holenstein, Mahim Ranjan, Praveen-Kumar Sampath, Frederic Bossu, Sumit Verma, Wesley Alan Sampson
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Publication number: 20180139078Abstract: A system includes: a baseband phase generator configured to receive differential in-phase (I) and quadrature (Q) signals and configured to output N phase-shifted baseband signals, wherein N is greater than 4, further wherein the baseband phase generator comprises a plurality of notch filters configured to receive the I and Q signals; and an upconverter configured to receive the phase-shifted baseband signals, to perform mixing on the phase-shifted baseband signals, and to output a differential upconverted signal.Type: ApplicationFiled: March 29, 2017Publication date: May 17, 2018Inventors: Ayush Mittal, Bhushan Shanti Asuri, Krishnaswamy Thiagarajan, Sameer Vasantlal Vora, Mahim Ranjan
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Publication number: 20180019759Abstract: A transceiver including: a reconfigurable circuit including a plurality of units including at least a converter, the converter including: a digital-to-analog converter (DAC); successive approximation register (SAR) logic configured to selectively couple to the DAC; and a plurality of switches configured to reconfigure the plurality of units of the reconfigurable circuit to operate the transceiver in a receive mode or transmit mode.Type: ApplicationFiled: January 24, 2017Publication date: January 18, 2018Inventors: Haim Mendel WEISSMAN, Mahim RANJAN
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Patent number: 9762274Abstract: An apparatus includes an elliptical inductance-capacitance (LC) filter and a resistive-capacitive (RC) notch filter serially coupled to the elliptical LC filter. The elliptical LC filter and the RC notch filter are configured to filter a radio-frequency (RF) signal received by a feedback receive path.Type: GrantFiled: March 20, 2015Date of Patent: September 12, 2017Assignee: QUALCOMM IncorporatedInventors: Shailesh Shekhar Rai, Mahim Ranjan, Jeremy Mark Goldblatt, Frederic Bossu, Vijay Chellappa
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Patent number: 9602079Abstract: In an exemplary embodiment, the communication device including an analog filter, where a digital signal processor sets the gain of the analog filter and the pole location of the filter simultaneously in order to maintain the filter pole location at a desired value or within a desired range. In further exemplary embodiments, the methodology to simultaneously set the gain and the pole location of the filters.Type: GrantFiled: November 4, 2009Date of Patent: March 21, 2017Assignee: QUALCOMM IncorporatedInventor: Mahim Ranjan
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Patent number: 9531337Abstract: Removing common-mode current from a pair of complementary current signals, including: generating a common-mode voltage of the pair of complementary current signals including at least a first current signal and a second current signal; measuring and outputting a difference voltage between the generated common-mode voltage and a common-mode reference voltage; and removing at least a portion of the common-mode current from the first current signal and the second current signal based on the difference voltage.Type: GrantFiled: January 22, 2015Date of Patent: December 27, 2016Assignee: QUALCOMM IncorporatedInventors: Minghui Chen, Mahim Ranjan, Jeremy Mark Goldblatt, Frederic Bossu
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Publication number: 20150349733Abstract: Removing common-mode current from a pair of complementary current signals, including: generating a common-mode voltage of the pair of complementary current signals including at least a first current signal and a second current signal; measuring and outputting a difference voltage between the generated common-mode voltage and a common-mode reference voltage; and removing at least a portion of the common-mode current from the first current signal and the second current signal based on the difference voltage.Type: ApplicationFiled: January 22, 2015Publication date: December 3, 2015Inventors: Minghui Chen, Mahim Ranjan, Jeremy Mark Goldblatt, Frederic Bossu
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Publication number: 20150349821Abstract: An apparatus includes an elliptical inductance-capacitance (LC) filter and a resistive-capacitive (RC) notch filter serially coupled to the elliptical LC filter. The elliptical LC filter and the RC notch filter are configured to filter a radio-frequency (RF) signal received by a feedback receive path.Type: ApplicationFiled: March 20, 2015Publication date: December 3, 2015Inventors: Shailesh Shekhar Rai, Mahim Ranjan, Jeremy Mark Goldblatt, Frederic Bossu, Vijay Chellappa
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Publication number: 20130225107Abstract: Techniques for using a narrow filter located before a power amplifier to reduce interference in an adjacent frequency band are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes the narrow filter and the power amplifier. The narrow filter is for a first frequency band (e.g., Band 40) and has a first bandwidth that is more narrow than the first frequency band. The narrow filter receives and filters an input radio frequency (RF) signal and provides a filtered RF signal. The power amplifier receives and amplifies the filtered RF signal and provides an amplified RF signal. The apparatus may further include a full filter for the first frequency band and located after the power amplifier. The full filter receives and filters the amplified RF signal and provides an output RF signal when it is selected for use.Type: ApplicationFiled: August 13, 2012Publication date: August 29, 2013Applicant: QUALCOMM INCORPORATEDInventors: Mark Vernon Lane, Chang-Ho Lee, Christian Holenstein, Mahim Ranjan, Praveen-Kumar Sampath, Frederic Bossu, Sumit Verma, Wesley Alan Sampson
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Patent number: 8432211Abstract: Techniques for providing an efficient interface between a mixer block and a transconductance (Gm) block. In an exemplary embodiment, the output currents of at least two unit cells of the transconductance block are conductively coupled together, and coupled to the mixer block using a single conductive path. For a differential signal, the conductive path may include two conductive leads. Within the mixer block, the single conductive path may be fanned out to at least two unit cells of the mixer block. At least one Gm unit cell may be selectively enabled or disabled to control the gain setting of the mixer-transconductance block. The techniques may further be applied to transceiver architectures supporting in-phase and quadrature mixing, as well as multi-mode and/or multi-band operation.Type: GrantFiled: April 20, 2010Date of Patent: April 30, 2013Assignee: Qualcomm IncorporatedInventors: Ojas M. Choksi, Mahim Ranjan
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Patent number: 8160513Abstract: An apparatus for implementing phase rotation at baseband frequency for transmit diversity may include a primary transmit signal path and a diversity transmit signal path. Both the primary transmit signal path and the diversity transmit signal path may receive a primary transmit signal. A signal selector within the diversity transmit signal path may perform phase rotation with respect to the primary transmit signal while the primary transmit signal is at a baseband frequency, thereby producing a diversity transmit signal.Type: GrantFiled: August 1, 2008Date of Patent: April 17, 2012Assignee: Qualcomm IncorporatedInventors: Yiwu Tang, Mahim Ranjan, Marco Cassia, Christian Holenstein