Patents by Inventor Ankush CHOWDHURY

Ankush 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).

  • Patent number: 11683609
    Abstract: A Complementary Metal Oxide Semiconductor (CMOS) Image Sensor (CIS), includes a pixel circuit, a VSL circuit, and an amplifier. The pixel circuit may generate a reset voltage and a signal voltage, based on a power supply connected to the pixel circuit and/or intensity of light captured by the pixel circuit. The VSL circuit may store pixel information in a pixel load based on settling a voltage at the pixel load to the signal voltage and/or set the voltage at the pixel load to a pixel reset voltage based on settling the voltage at the pixel load to the reset voltage. The amplifier may generate a voltage, based on varying a resistance at an input of the amplifier, to enable the VSL circuit to store the pixel information and/or set the voltage at the pixel load to the pixel reset voltage.
    Type: Grant
    Filed: January 3, 2022
    Date of Patent: June 20, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Anurup Saha, M Satya Chaitanya Chigatapu, Madhusudan Govindarajan, Ankush Chowdhury
  • Publication number: 20230022036
    Abstract: A Complementary Metal Oxide Semiconductor (CMOS) Image Sensor (CIS), includes a pixel circuit, a VSL circuit, and an amplifier. The pixel circuit may generate a reset voltage and a signal voltage, based on a power supply connected to the pixel circuit and/or intensity of light captured by the pixel circuit. The VSL circuit may store pixel information in a pixel load based on settling a voltage at the pixel load to the signal voltage and/or set the voltage at the pixel load to a pixel reset voltage based on settling the voltage at the pixel load to the reset voltage. The amplifier may generate a voltage, based on varying a resistance at an input of the amplifier, to enable the VSL circuit to store the pixel information and/or set the voltage at the pixel load to the pixel reset voltage.
    Type: Application
    Filed: January 3, 2022
    Publication date: January 26, 2023
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Anurup SAHA, M Satya Chaitanya CHIGATAPU, Madhusudan GOVINDARAJAN, Ankush CHOWDHURY
  • Patent number: 11533044
    Abstract: An apparatus for generating multi-signaling output voltage may include at least one output buffer, wherein the at least one the output buffer may include a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a second NMOS transistor, and a Zener diode along with a switchable current source. The apparatus may further include first logic circuitry, second logic circuitry, first voltage down level shifter circuitry, second voltage down level shifter circuitry, and a first voltage up level shifter circuitry. Outputs of the first voltage down level shifter circuitry, the second voltage down level shifter circuitry, and the first voltage up level shifter circuitry are combined using the output buffer to generate the desired output. The second NMOS transistor acts as isolation transistor for reducing and/or preventing diode current between a first supply voltage and the third supply voltage.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: December 20, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Zaira Zahir, Saurabh Saxena, Ankush Chowdhury
  • Publication number: 20220216857
    Abstract: An apparatus for generating multi-signaling output voltage may include at least one output buffer, wherein the at least one the output buffer may include a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a second NMOS transistor, and a Zener diode along with a switchable current source. The apparatus may further include first logic circuitry, second logic circuitry, first voltage down level shifter circuitry, second voltage down level shifter circuitry, and a first voltage up level shifter circuitry. Outputs of the first voltage down level shifter circuitry, the second voltage down level shifter circuitry, and the first voltage up level shifter circuitry are combined using the output buffer to generate the desired output. The second NMOS transistor acts as isolation transistor for reducing and/or preventing diode current between a first supply voltage and the third supply voltage.
    Type: Application
    Filed: August 12, 2021
    Publication date: July 7, 2022
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Zaira ZAHIR, Saurabh SAXENA, Ankush CHOWDHURY
  • Patent number: 11375144
    Abstract: A method for reducing thermal shading in a complementary metal-oxide-semiconductor (CMOS) image sensor is provided. The method includes: detecting one or more regions in a CMOS image sensor in which thermal shading occurs, the CMOS image sensor including a plurality of heating elements in a chip; automatically switching a subset of the plurality of heating elements to turn on based on the detected one or more regions; and automatically switching the subset of the plurality of heating elements to turn off in an active power consumption phase of the CMOS image sensor.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: June 28, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ankush Chowdhury, Ramana Babu Lalam, Prashant Govindlal Rupapara, Rohan Anand
  • Publication number: 20210051289
    Abstract: A method for reducing thermal shading in a complementary metal-oxide-semiconductor (CMOS) image sensor is provided. The method includes: detecting one or more regions in a CMOS image sensor in which thermal shading occurs, the CMOS image sensor including a plurality of heating elements in a chip; automatically switching a subset of the plurality of heating elements to turn on based on the detected one or more regions; and automatically switching the subset of the plurality of heating elements to turn off in an active power consumption phase of the CMOS image sensor.
    Type: Application
    Filed: August 14, 2020
    Publication date: February 18, 2021
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ankush CHOWDHURY, Ramana Babu Lalam, Prashant Govindlal Rupapara, Rohan Anand