Patents by Inventor Chirag Gulati
Chirag Gulati 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: 11948220Abstract: The disclosed computer-implemented method may include dynamically selecting transportation options to present to a transportation requestor device based on current transportation network conditions and transportation requestor device history. In some embodiments, transportation network may have many different ways of arranging a transportation requestor's trip, such as private rides, shared rides, immediate rides, and delayed rides. In some examples, the requestor's choice of transportation option may have an impact on the transportation network. In anticipation of or in response to a transportation request, the method may determine which transportation options will better benefit the transportation network and determine which transportation options to display to the requestor and/or the prominence with which the transportation products are displayed. Various other methods, systems, and computer-readable media are also disclosed.Type: GrantFiled: December 21, 2021Date of Patent: April 2, 2024Assignee: Lyft, Inc.Inventors: Abhinav Amrut Vora, Hao Yu Liu, Benjamin Han, Julia Yu, Le Guan, Xiaoyuan Xu, Mayank Gulati, Charles Parker Spielman, Chirag Chhagan Chheda, David Chouinard
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Patent number: 11551748Abstract: A circuit for recycling energy in bit lines (BL and BLB) of SRAM during write operation by (i) storing the charges BL and BLB to an intermediate voltage source (VLB) in a discharge phase and (ii) restoring the charges from the intermediate voltage, back to the BL or BLB in a recovery phase. The circuit includes an inductor, a pair of NMOS transistors, a series resonance node, and an energy source (VLB) in addition to the components of an SRAM input-output circuit shown as in FIG. 1. During the SRAM write operation, the BL or BLB is discharged to the energy source VLB through the pair of NMOS transistors and, the inductor and the series resonance node. The remaining energy in the BL and the BLB is discharged to ground using the write complementary write drivers.Type: GrantFiled: May 4, 2021Date of Patent: January 10, 2023Assignee: Rezonent Microchips Pvt. Ltd.Inventors: Ignatius Bezzam, Biprangshu Saha, Chirag Gulati
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Publication number: 20210350848Abstract: A circuit for recycling energy in bit lines (BL and BLB) of SRAM during write operation by (i) storing the charges BL and BLB to an intermediate voltage source (VLB) in a discharge phase and (ii) restoring the charges from the intermediate voltage, back to the BL or BLB in a recovery phase. The circuit includes an inductor, a pair of NMOS transistors, a series resonance node, and an energy source (VLB) in addition to the components of an SRAM input-output circuit shown as in FIG. 1. During the SRAM write operation, the BL or BLB is discharged to the energy source VLB through the pair of NMOS transistors and, the inductor and the series resonance node. The remaining energy in the BL and the BLB is discharged to ground using the write complementary write drivers.Type: ApplicationFiled: May 4, 2021Publication date: November 11, 2021Inventors: Ignatius Bezzam, Biprangshu Saha, Chirag Gulati
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Patent number: 9188642Abstract: A method of operating an apparatus in a functional mode and an ATPG scan mode and an apparatus for use in a functional mode and an ATPG scan mode are provided. The apparatus includes a set of latches including a first latch and a second latch. The first latch is operated as a master latch and the second latch is operated as a master latch in the functional mode. The first latch is operated as a master latch of a flip-flop and the second latch is operated as a slave latch of the flip-flop in the ATPG scan mode. In one configuration, the apparatus includes a plurality of latches including at least the first and second latches, an output of each of the latches is coupled to a digital circuit, the apparatus includes a plurality of functional inputs, and each of the functional inputs is input to the digital circuit.Type: GrantFiled: August 23, 2013Date of Patent: November 17, 2015Assignee: QUALCOMM IncorporatedInventors: Chirag Gulati, Ritu Chaba, Lakshmikantha Holla Vakwadi
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Patent number: 9165641Abstract: A memory device biasing circuit is disclosed, the circuit having a pair of semiconductor devices coupled to receive a supply voltage having a supply voltage level suitable for operating a memory device in an active mode and operable for providing an adjustable biased voltage to the memory device that is greater than a minimal voltage level for operating the memory device in a data retention mode. The pair of semiconductor devices includes a first semiconductor device; and, a second semiconductor device that includes an opposite type of semiconductor device than the first semiconductor device such that the pair of semiconductor devices includes each of an N-type semiconductor device and a P-type semiconductor device. The memory device biasing circuit further includes a bias adjustment circuit coupled to the second semiconductor device and configured to adjust the operation of the second semiconductor device based on the supply voltage.Type: GrantFiled: December 13, 2013Date of Patent: October 20, 2015Assignee: QUALCOMM IncorporatedInventors: Chirag Gulati, Ashish Akhilesh, Venkatasubramanian Narayanan
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Patent number: 9111589Abstract: Disclosed are various apparatuses and methods for a memory with a multiple word line design. A memory timing circuit may include a dummy word line including a first portion and a second portion and further including capacitative loading that is lumped in the second portion of the dummy word line, a first transistor connected to the first portion of the dummy word line and configured to charge the dummy word line, and a second transistor connected to the second portion of the dummy word line and configured to discharge the dummy word line. A method may include charging a dummy word line using a first transistor, and discharging the dummy word line using a second transistor, wherein the dummy word line includes a first portion and a second portion and further includes capacitative loading that is lumped in the second portion of the dummy word line.Type: GrantFiled: September 4, 2013Date of Patent: August 18, 2015Assignee: QUALCOMM IncorporatedInventors: Rakesh Kumar Sinha, Chirag Gulati, Ritu Chaba, Sei Seung Yoon
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Patent number: 9064556Abstract: A pseudo dual port (PDP) memory is disclosed having a write driver that selectively precharges only one of a bit line and a complement bit line in a bit line pair responsive to a bit value to be written into an accessed bitcell while discharging a remaining one of the bit line and the complement bit line. In this fashion, the cleanup time between a read operation and a write operation during a read/write clock cycle is advantageously reduced.Type: GrantFiled: October 23, 2013Date of Patent: June 23, 2015Assignee: QUALCOMM IncorporatedInventors: Chirag Gulati, Lakshmikantha Holla Vakwadi, Sei Seung Yoon
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Publication number: 20150170736Abstract: A memory device biasing circuit is disclosed, the circuit having a pair of semiconductor devices coupled to receive a supply voltage having a supply voltage level suitable for operating a memory device in an active mode and operable for providing an adjustable biased voltage to the memory device that is greater than a minimal voltage level for operating the memory device in a data retention mode. The pair of semiconductor devices includes a first semiconductor device; and, a second semiconductor device that includes an opposite type of semiconductor device than the first semiconductor device such that the pair of semiconductor devices includes each of an N-type semiconductor device and a P-type semiconductor device. The memory device biasing circuit further includes a bias adjustment circuit coupled to the second semiconductor device and configured to adjust the operation of the second semiconductor device based on the supply voltage.Type: ApplicationFiled: December 13, 2013Publication date: June 18, 2015Applicant: QUALCOMM IncorporatedInventors: Chirag Gulati, Ashish Akhilesh, Venkatasubramanian Narayanan
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Patent number: 9030863Abstract: An integrated circuit includes one or more bit cells, a word line coupled to the one or more bit cells, and a dummy word line arranged with the word line to have a capacitance therebetween. The capacitance provides a voltage boost or reduction of the word line to assist read and write operations.Type: GrantFiled: September 26, 2013Date of Patent: May 12, 2015Assignee: QUALCOMM IncorporatedInventors: Chirag Gulati, Rakesh Kumar Sinha, Ritu Chaba, Sei Seung Yoon
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Publication number: 20150109865Abstract: A pseudo dual port (PDP) memory is disclosed having a write driver that selectively precharges only one of a bit line and a complement bit line in a bit line pair responsive to a bit value to be written into an accessed bitcell while discharging a remaining one of the bit line and the complement bit line. In this fashion, the cleanup time between a read operation and a write operation during a read/write clock cycle is advantageously reduced.Type: ApplicationFiled: October 23, 2013Publication date: April 23, 2015Applicant: QUALCOMM IncorporatedInventors: Chirag Gulati, Lakshmikantha Holla Vakwadi, Sei-Seung Yoon
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Publication number: 20150085568Abstract: An integrated circuit includes one or more bit cells, a word line coupled to the one or more bit cells, and a dummy word line arranged with the word line to have a capacitance therebetween. The capacitance provides a voltage boost or reduction of the word line to assist read and write operations.Type: ApplicationFiled: September 26, 2013Publication date: March 26, 2015Applicant: QUALCOMM IncorporatedInventors: Chirag GULATI, Rakesh SINHA, Ritu CHABA, Sei Seung YOON
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Publication number: 20150063046Abstract: Disclosed are various apparatuses and methods for a memory with a multiple word line design. A memory timing circuit may include a dummy word line including a first portion and a second portion and further including capacitative loading that is lumped in the second portion of the dummy word line, a first transistor connected to the first portion of the dummy word line and configured to charge the dummy word line, and a second transistor connected to the second portion of the dummy word line and configured to discharge the dummy word line. A method may include charging a dummy word line using a first transistor, and discharging the dummy word line using a second transistor, wherein the dummy word line includes a first portion and a second portion and further includes capacitative loading that is lumped in the second portion of the dummy word line.Type: ApplicationFiled: September 4, 2013Publication date: March 5, 2015Applicant: QUALCOMM INCORPORATEDInventors: Rakesh Kumar SINHA, Chirag GULATI, Ritu CHABA, Sei Seung YOON
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Publication number: 20150058686Abstract: A method of operating an apparatus in a functional mode and an ATPG scan mode and an apparatus for use in a functional mode and an ATPG scan mode are provided. The apparatus includes a set of latches including a first latch and a second latch. The first latch is operated as a master latch and the second latch is operated as a master latch in the functional mode. The first latch is operated as a master latch of a flip-flop and the second latch is operated as a slave latch of the flip-flop in the ATPG scan mode. In one configuration, the apparatus includes a plurality of latches including at least the first and second latches, an output of each of the latches is coupled to a digital circuit, the apparatus includes a plurality of functional inputs, and each of the functional inputs is input to the digital circuit.Type: ApplicationFiled: August 23, 2013Publication date: February 26, 2015Applicant: QUALCOMM IncorporatedInventors: Chirag GULATI, Ritu CHABA, Lakshmikantha HOLLA VAKWADI
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Patent number: 8929153Abstract: Disclosed are various apparatuses and methods for a memory with a multiple read word line design. A memory may include a plurality of bit cells arranged in a row, a first read word line connected to a first subset of the plurality of bit cells, and a second read word line connected to a second subset of the plurality of bit cells, wherein the first and second subsets are located in the same row of bit cells. A method may include asserting, during a first read operation, a first read word line connected to a first subset of a plurality of bit cells arranged in a row of bit cells, and asserting, during a second read operation, a second read word line connected to a second subset of the plurality of bit cells, wherein the first and second subsets are located in the same row of bit cells.Type: GrantFiled: August 23, 2013Date of Patent: January 6, 2015Assignee: QUALCOMM IncorporatedInventors: Chirag Gulati, Rakesh Kumar Sinha, Ritu Chaba, Sei Seung Yoon
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Patent number: 8378711Abstract: A circuit for detecting a single bit upset in a dynamic logic circuit includes a latch circuit having an input for receiving a reset signal, and an output for providing a flag output signal, the latch circuit being clocked by a first clock signal, a first transistor having a drain coupled to the output of the latch circuit, a gate for receiving a second clock signal, and a source, and a second transistor having a drain coupled to the source of the first transistor, a gate for receiving a third clock signal, and a source coupled to ground.Type: GrantFiled: March 1, 2011Date of Patent: February 19, 2013Assignees: STMicroelectronics S.r.l., STMicroelectronics International N.V.Inventors: Chirag Gulati, Jitendra Dasani, Rita Zappa, Stefano Corbani
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Publication number: 20120223735Abstract: A circuit for detecting a single bit upset in a dynamic logic circuit includes a latch circuit having an input for receiving a reset signal, and an output for providing a flag output signal, the latch circuit being clocked by a first clock signal, a first transistor having a drain coupled to the output of the latch circuit, a gate for receiving a second clock signal, and a source, and a second transistor having a drain coupled to the source of the first transistor, a gate for receiving a third clock signal, and a source coupled to ground.Type: ApplicationFiled: March 1, 2011Publication date: September 6, 2012Applicants: STMicroelectronics S.r.l., STMicroelectronics Pvt Ltd.Inventors: Chirag GULATI, Jitendra DASANI, Rita ZAPPA, Stefano CORBANI
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Publication number: 20100172198Abstract: A sensing device for a data storage system may include a sensing circuit, a pull-down circuit, and a pull-up circuit. The sensing circuit may sense discharging of a desired bit line or a complementary bit line and may generate a desired output. The pull-down circuit may be coupled to the bit line and the complementary bit line for enhancing the discharging rate and may increase the sensing speed of the storage system. The pull-up circuit may control the discharging of an undesired bit line or complementary bit line.Type: ApplicationFiled: December 29, 2009Publication date: July 8, 2010Applicant: STMicroelectronics Pvt. Ltd.Inventors: Akhilesh GAUTAM, Chirag GULATI