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).

  • Patent number: 11948220
    Abstract: 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: Grant
    Filed: December 21, 2021
    Date of Patent: April 2, 2024
    Assignee: 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
  • Patent number: 11551748
    Abstract: 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: Grant
    Filed: May 4, 2021
    Date of Patent: January 10, 2023
    Assignee: Rezonent Microchips Pvt. Ltd.
    Inventors: Ignatius Bezzam, Biprangshu Saha, Chirag Gulati
  • Publication number: 20210350848
    Abstract: 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: Application
    Filed: May 4, 2021
    Publication date: November 11, 2021
    Inventors: Ignatius Bezzam, Biprangshu Saha, Chirag Gulati
  • Patent number: 9188642
    Abstract: 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: Grant
    Filed: August 23, 2013
    Date of Patent: November 17, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Ritu Chaba, Lakshmikantha Holla Vakwadi
  • Patent number: 9165641
    Abstract: 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: Grant
    Filed: December 13, 2013
    Date of Patent: October 20, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Ashish Akhilesh, Venkatasubramanian Narayanan
  • Patent number: 9111589
    Abstract: 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: Grant
    Filed: September 4, 2013
    Date of Patent: August 18, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Rakesh Kumar Sinha, Chirag Gulati, Ritu Chaba, Sei Seung Yoon
  • Patent number: 9064556
    Abstract: 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: Grant
    Filed: October 23, 2013
    Date of Patent: June 23, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Lakshmikantha Holla Vakwadi, Sei Seung Yoon
  • Publication number: 20150170736
    Abstract: 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: Application
    Filed: December 13, 2013
    Publication date: June 18, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Ashish Akhilesh, Venkatasubramanian Narayanan
  • Patent number: 9030863
    Abstract: 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: Grant
    Filed: September 26, 2013
    Date of Patent: May 12, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Rakesh Kumar Sinha, Ritu Chaba, Sei Seung Yoon
  • Publication number: 20150109865
    Abstract: 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: Application
    Filed: October 23, 2013
    Publication date: April 23, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Lakshmikantha Holla Vakwadi, Sei-Seung Yoon
  • Publication number: 20150085568
    Abstract: 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: Application
    Filed: September 26, 2013
    Publication date: March 26, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Chirag GULATI, Rakesh SINHA, Ritu CHABA, Sei Seung YOON
  • Publication number: 20150063046
    Abstract: 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: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: QUALCOMM INCORPORATED
    Inventors: Rakesh Kumar SINHA, Chirag GULATI, Ritu CHABA, Sei Seung YOON
  • Publication number: 20150058686
    Abstract: 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: Application
    Filed: August 23, 2013
    Publication date: February 26, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Chirag GULATI, Ritu CHABA, Lakshmikantha HOLLA VAKWADI
  • Patent number: 8929153
    Abstract: 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: Grant
    Filed: August 23, 2013
    Date of Patent: January 6, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Chirag Gulati, Rakesh Kumar Sinha, Ritu Chaba, Sei Seung Yoon
  • Patent number: 8378711
    Abstract: 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: Grant
    Filed: March 1, 2011
    Date of Patent: February 19, 2013
    Assignees: STMicroelectronics S.r.l., STMicroelectronics International N.V.
    Inventors: Chirag Gulati, Jitendra Dasani, Rita Zappa, Stefano Corbani
  • Publication number: 20120223735
    Abstract: 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: Application
    Filed: March 1, 2011
    Publication date: September 6, 2012
    Applicants: STMicroelectronics S.r.l., STMicroelectronics Pvt Ltd.
    Inventors: Chirag GULATI, Jitendra DASANI, Rita ZAPPA, Stefano CORBANI
  • Publication number: 20100172198
    Abstract: 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: Application
    Filed: December 29, 2009
    Publication date: July 8, 2010
    Applicant: STMicroelectronics Pvt. Ltd.
    Inventors: Akhilesh GAUTAM, Chirag GULATI