Patents by Inventor De Lu

De Lu 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).

  • Publication number: 20250192755
    Abstract: A system includes a first sense amplifier having a first data input, a second data input, a clock input configured to receive a first clock signal, a first output, and a second output. The system also includes a second sense amplifier having a first data input, a second data input, a clock input configured to receive a second clock signal, a first output, and a second output. The first data input of the second sense amplifier is coupled to the first data input of the first sense amplifier, and the second data input of the second sense amplifier is coupled to the second data input of the first sense amplifier. The system also includes a set-reset (S-R) latch coupled to the first output and the second output of the first sense amplifier, and coupled to the first output and the second output of the second sense amplifier.
    Type: Application
    Filed: December 12, 2023
    Publication date: June 12, 2025
    Inventors: Tianyu TANG, Wei-Yen CHEN, Janus CHIU, Rui LI, De LU, Venkat NARAYANAN
  • Patent number: 11823962
    Abstract: Aspects of the disclosure are directed to sensing integrated circuit (IC) Back End Of Line (BEOL) process corners. In one aspect, an apparatus for sensing IC BEOL process corners includes a ring oscillator including a plurality of ring oscillator stages configured to generate an output waveform with a frequency state; and a shield net circuit including a plurality of shield net stages corresponding to the plurality of ring oscillator stages, the shield net circuit having a toggle input. And, a method includes generating an output waveform with a frequency state using a ring oscillator that includes a plurality of ring oscillator stages; modifying a plurality of ring oscillator stage time delays through a coupling between a plurality of shield net stages and the plurality of ring oscillator stages; and selecting the frequency state using a toggle input of a shield net circuit which includes the plurality of shield net stages.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: November 21, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: Saravanan Marimuthu, De Lu, Baldeo Sharan Sharma, Peeyush Kumar Parkar, Venkat Narayanan, Rui Li, Samy Shafik Tawfik Zaynoun, Min Chen, David Kidd, Amit Patil
  • Patent number: 11810636
    Abstract: An aspect of the disclosure relates to a latch array, including: a first set of master latches including a first set of clock inputs configured to receive a master clock, a first set of data inputs configured to receive a first set of data, and a first set of data outputs coupled to a set of bitlines, respectively; a second set of master latches including a second set of clock inputs configured to receive the master clock, a first set of write-bit inputs configured to receive a set of write-bit signals, and a set of write-bit outputs coupled to a set of write-bit lines, respectively; and an array of slave latches, wherein the slave latches in columns of the array include a second set of data inputs coupled to the set of bitlines, and a second set of write-bit inputs coupled to the set of write-bit lines, respectively.
    Type: Grant
    Filed: January 12, 2022
    Date of Patent: November 7, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: Rui Li, De Lu, Venkat Narayanan
  • Publication number: 20230223054
    Abstract: An aspect of the disclosure relates to a latch array, including: a first set of master latches including a first set of clock inputs configured to receive a master clock, a first set of data inputs configured to receive a first set of data, and a first set of data outputs coupled to a set of bitlines, respectively; a second set of master latches including a second set of clock inputs configured to receive the master clock, a first set of write-bit inputs configured to receive a set of write-bit signals, and a set of write-bit outputs coupled to a set of write-bit lines, respectively; and an array of slave latches, wherein the slave latches in columns of the array include a second set of data inputs coupled to the set of bitlines, and a second set of write-bit inputs coupled to the set of write-bit lines, respectively.
    Type: Application
    Filed: January 12, 2022
    Publication date: July 13, 2023
    Inventors: Rui LI, De LU, Venkat NARAYANAN
  • Patent number: 11695393
    Abstract: A latch array including a row of master latches coupled to columns of slave latches. Each master latch includes an OR-AND-Inverter (OAI) gate cross-coupled with a NAND gate to receive and latch an input data, and each slave latch includes an AND-OR-Inverter (AOI) gate cross-coupled with a NOR gate to receive and latch the data from the master latch, and an inverter including an input coupled to the AOI gate and an output to produce an output data based on the input data. Alternatively, each master latch includes an AND-OR-Inverter (AOI) gate cross-coupled with a NOR gate to receive and latch an input data, and each slave latch includes an OR-AND-Inverter (OAI) gate cross-coupled with a NAND gate to receive and latch the data from the master latch, and an inverter including an input coupled to the OAI gate and an output to produce an output data.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: July 4, 2023
    Assignee: QUALCOMM INCORPORATED
    Inventors: Rui Li, De Lu, Venkat Narayanan
  • Publication number: 20220270938
    Abstract: Aspects of the disclosure are directed to sensing integrated circuit (IC) Back End Of Line (BEOL) process corners. In one aspect, an apparatus for sensing IC BEOL process corners includes a ring oscillator including a plurality of ring oscillator stages configured to generate an output waveform with a frequency state; and a shield net circuit including a plurality of shield net stages corresponding to the plurality of ring oscillator stages, the shield net circuit having a toggle input. And, a method includes generating an output waveform with a frequency state using a ring oscillator that includes a plurality of ring oscillator stages; modifying a plurality of ring oscillator stage time delays through a coupling between a plurality of shield net stages and the plurality of ring oscillator stages; and selecting the frequency state using a toggle input of a shield net circuit which includes the plurality of shield net stages.
    Type: Application
    Filed: February 19, 2021
    Publication date: August 25, 2022
    Inventors: Saravanan MARIMUTHU, De LU, Baldeo Sharan SHARMA, Peeyush Kumar PARKAR, Venkat NARAYANAN, Rui LI, Samy Shafik Tawfik ZAYNOUN, Min CHEN, David KIDD, Amit PATIL
  • Publication number: 20220247391
    Abstract: A latch array including a row of master latches coupled to columns of slave latches. Each master latch includes an OR-AND-Inverter (OAI) gate cross-coupled with a NAND gate to receive and latch an input data, and each slave latch includes an AND-OR-Inverter (AOI) gate cross-coupled with a NOR gate to receive and latch the data from the master latch, and an inverter including an input coupled to the AOI gate and an output to produce an output data based on the input data. Alternatively, each master latch includes an AND-OR-Inverter (AOI) gate cross-coupled with a NOR gate to receive and latch an input data, and each slave latch includes an OR-AND-Inverter (OAI) gate cross-coupled with a NAND gate to receive and latch the data from the master latch, and an inverter including an input coupled to the OAI gate and an output to produce an output data.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 4, 2022
    Inventors: Rui LI, De LU, Venkat NARAYANAN
  • Patent number: 11334321
    Abstract: A true random number generator (TRNG) for generating a sequence of random numbers of bits is disclosed. The TRNG includes a TRNG cell configured to generate a sequence of bits logically alternating with a mean frequency and with substantially random period jitter; a period monitor configured to generate a first sequence of random bits based on a set of periods of the sequence of logically alternating bits; and a sampling circuit configured to sample the first sequence of random bits in response to a sampling clock to generate a second sequence of random bits.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: May 17, 2022
    Assignee: QUALCOMM INCORPORATED
    Inventors: Rui Li, De Lu, Venkat Narayanan, Srivatsan Chellappa
  • Publication number: 20220021578
    Abstract: A method for configuring modeling parameters, an electronic device and a computer storage medium, which relate to the field of artificial intelligence and deep learning technologies, are disclosed. An association rule among modeling parameters is hidden in an interaction, and the user is guided to complete a configuration of the modeling parameters in the form of a page interaction.
    Type: Application
    Filed: March 22, 2021
    Publication date: January 20, 2022
    Inventors: De Lu, Mingzhi Xu
  • Publication number: 20210405973
    Abstract: A true random number generator (TRNG) for generating a sequence of random numbers of bits is disclosed. The TRNG includes a TRNG cell configured to generate a sequence of bits logically alternating with a mean frequency and with substantially random period jitter; a period monitor configured to generate a first sequence of random bits based on a set of periods of the sequence of logically alternating bits; and a sampling circuit configured to sample the first sequence of random bits in response to a sampling clock to generate a second sequence of random bits.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 30, 2021
    Inventors: Rui LI, De LU, Venkat NARAYANAN, Srivatsan CHELLAPPA
  • Patent number: 10987909
    Abstract: The present invention provides a method of laminating a film for a dye-sensitized cell. First, a composite film is taken by a robotic arm, in which the composite film includes a release layer, a protective layer and a hot glue layer between the release layer and the protective layer, and the release layer is removed by the robotic arm. Then, the hot glue layer is precisely attached to a substrate by a target positioning step. Next, the protective layer is removed by the robotic arm.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: April 27, 2021
    Assignee: FORMOSA PLASTICS CORPORATION
    Inventors: Ching-Fu Chen, Hao-Wei Chen, Kun-Tai Ho, Wan-Tun Hung, Po-Min Chen, Liang-Kun Huang, Chih-Chou Chang, Yung-Liang Tung, Po-Tsung Hsiao, Ming-De Lu
  • Publication number: 20200101711
    Abstract: The present invention provides a method of laminating a film for a dye-sensitized cell. First, a composite film is taken by a robotic arm, in which the composite film includes a release layer, a protective layer and a hot glue layer between the release layer and the protective layer, and the release layer is removed by the robotic arm. Then, the hot glue layer is precisely attached to a substrate by a target positioning step. Next, the protective layer is removed by the robotic arm.
    Type: Application
    Filed: October 2, 2019
    Publication date: April 2, 2020
    Inventors: Ching-Fu CHEN, Hao-Wei CHEN, Kun-Tai HO, Wan-Tun HUNG, Po-Min CHEN, Liang-Kun HUANG, Chih-Chou CHANG, Yung-Liang TUNG, Po-Tsung HSIAO, Ming-De LU
  • Patent number: 10164768
    Abstract: In certain aspects, a circuit includes a dynamic differential logic gate having first and second outputs, and a first static differential logic gate having first and second outputs, and first and second inputs coupled to the first and second outputs, respectively, of the dynamic differential logic gate. The dynamic differential logic gate is configured to receive a clock signal and to preset both the first and second outputs of the dynamic differential logic gate to a first preset value during a first phase of the clock signal. The first static differential logic gate is configured to preset both the first and second outputs of the first static differential logic gate to a second preset value when the first preset value is input to both the first and second inputs of the first static differential logic gate.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: December 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Ravindraraj Ramaraju, Rakesh Vattikonda, Samrat Sinharoy, De Lu, Bo Pang
  • Publication number: 20180174623
    Abstract: An apparatus and method are disclosed for transferring data from a first core to a second core of an integrated circuit (IC). The first core includes first and second memory blocks (e.g., first and second portions of a first-in-first-out (FIFO) memory coupled to first and second pre-multiplexers, respectively). The second core includes a multiplexer including first and second inputs coupled to the first and second memory blocks, respectively. Additionally, the second core includes a read controller configured to generate a first read control signal to cause the first and second memory blocks to transfer data to the first and second inputs of the multiplexer, respectively; and generate a second read control signal to cause the multiplexer to transfer data from the first and inputs to an output of the multiplexer.
    Type: Application
    Filed: December 16, 2016
    Publication date: June 21, 2018
    Inventors: Fei Xu, Rakesh Vattikonda, Dina McKinney, Zhen Chen, Yun Li, Zhenbiao Ma, De Lu
  • Patent number: 9948303
    Abstract: In one embodiment, a voltage level shifter includes a first p-type metal-oxide-semiconductor (PMOS) transistor having a gate configured to receive an input signal in a first power domain, and a second PMOS transistor, wherein the first and second PMOS transistors are coupled in series between a supply voltage of a second power domain and a node. The voltage level shifter also includes an inverter having an input coupled to the node and an output coupled to a gate of the second PMOS transistor, and a first n-type metal-oxide-semiconductor (NMOS) transistor having a gate configured to receive the input signal in the first power domain, wherein the first NMOS transistor is coupled between the node and a ground.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: April 17, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Venkat Narayanan, Rakesh Vattikonda, De Lu, Ramaprasath Vilangudipitchai, Samrat Sinharoy, Rui Chen
  • Patent number: 9941866
    Abstract: In an aspect of the disclosure, a method and an apparatus are provided. The apparatus is a register array including first and second flip-flop latch arrays. The first flip-flop latch array includes a first set of master latches, a first set of slave latches coupled to the first set of master latches, and a first address port. The second flip-flop latch array includes a second set of master latches, a second set of slave latches coupled to the second set of master latches, and a second address port. The register array includes an address counter, coupled to the first flip-flop latch array and the second flip-flop latch array. The address counter is shared by the first flip-flop latch array and the second flip-flop latch array and configured to address, in parallel in a test mode, the first flip-flop latch array through the first address port and the second flip-flop latch array through the second address port.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: April 10, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Rakesh Vattikonda, Samrat Sinharoy, De Lu
  • Publication number: 20180074126
    Abstract: An apparatus and method of employing mutually exclusive write and read clocks in scan capture mode for testing digital interfaces. The apparatus includes a first circuit and a first clock generator configured to generate a first clock signal for transferring a test sample from an input to an output of the first circuit in response to the first clock signal during each of a first set of scan capture cycles; a second circuit and a second clock generator configured to generate a second clock signal for transferring the test sample from an input to an output of the second circuit in response to the second clock signal during each of a second set of scan capture cycle; the first clock signal being suppressed during each scan capture cycle of the second set, and the second clock signal being suppressed during each scan capture cycle of the first set.
    Type: Application
    Filed: September 12, 2016
    Publication date: March 15, 2018
    Inventors: Bilal Zafar, Rakesh Vattikonda, De Lu, Venkatasubramanian Narayanan, Masoud Zamani, Joseph Fang
  • Publication number: 20180019734
    Abstract: In an aspect of the disclosure, a method and an apparatus are provided. The apparatus is a register array including first and second flip-flop latch arrays. The first flip-flop latch array includes a first set of master latches, a first set of slave latches coupled to the first set of master latches, and a first address port. The second flip-flop latch array includes a second set of master latches, a second set of slave latches coupled to the second set of master latches, and a second address port. The register array includes an address counter, coupled to the first flip-flop latch array and the second flip-flop latch array. The address counter is shared by the first flip-flop latch array and the second flip-flop latch array and configured to address, in parallel in a test mode, the first flip-flop latch array through the first address port and the second flip-flop latch array through the second address port.
    Type: Application
    Filed: July 12, 2016
    Publication date: January 18, 2018
    Inventors: Rakesh VATTIKONDA, Samrat SINHAROY, De LU
  • Publication number: 20180006650
    Abstract: In one embodiment, a voltage level shifter includes a first NOR gate having a first input configured to receive a first input signal in a first power domain, a second input configured to receive an enable signal in a second power domain, a third input, and an output. The voltage level shifter also includes a second NOR gate having a first input configured to receive a second input signal in the first power domain, a second input configured to receive the enable signal in the second power domain, a third input coupled to the output of the first NOR gate, and an output coupled to the third input of the first NOR gate. The first and second NOR gates are powered by a supply voltage of the second power domain.
    Type: Application
    Filed: December 2, 2016
    Publication date: January 4, 2018
    Inventors: Venkat Narayanan, Rakesh Vattikonda, De Lu, Ramaprasath Vilangudipitchai, Samrat Sinharoy, Rui Chen
  • Publication number: 20180006651
    Abstract: In one embodiment, a voltage level shifter includes a first p-type metal-oxide-semiconductor (PMOS) transistor having a gate configured to receive an input signal in a first power domain, and a second PMOS transistor, wherein the first and second PMOS transistors are coupled in series between a supply voltage of a second power domain and a node. The voltage level shifter also includes an inverter having an input coupled to the node and an output coupled to a gate of the second PMOS transistor, and a first n-type metal-oxide-semiconductor (NMOS) transistor having a gate configured to receive the input signal in the first power domain, wherein the first NMOS transistor is coupled between the node and a ground.
    Type: Application
    Filed: December 2, 2016
    Publication date: January 4, 2018
    Inventors: Venkat Narayanan, Rakesh Vattikonda, De Lu, Ramaprasath Vilangudipitchai, Samrat Sinharoy, Rui Chen