Patents by Inventor Bhuvanesh Radhakrishnan Kulasekaran

Bhuvanesh Radhakrishnan Kulasekaran 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).

  • High voltage output stage
    Patent number: 11183976
    Abstract: An amplifier circuit includes a high-voltage output stage. The high-voltage output stage includes an output terminal, a high-side output circuit, a low-side output circuit, and a feedback circuit. The high-side output circuit sources current to the output terminal, and includes a high-side input transistor, a first high-side cascode transistor coupled to the high-side input transistor, and a second high-side cascode transistor coupled to the first high-side cascode transistor and the output terminal. The low-side output circuit sinks current from the output terminal, and includes a low-side input transistor, a first low-side cascode transistor coupled to the low-side input transistor, and a second low-side cascode transistor coupled to the first low-side cascode transistor and the output terminal.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: November 23, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Steven Graham Brantley, Munaf Hussain Shaik, Bhuvanesh Radhakrishnan Kulasekaran
  • HIGH VOLTAGE OUTPUT STAGE
    Publication number: 20210175859
    Abstract: An amplifier circuit includes a high-voltage output stage. The high-voltage output stage includes an output terminal, a high-side output circuit, a low-side output circuit, and a feedback circuit. The high-side output circuit sources current to the output terminal, and includes a high-side input transistor, a first high-side cascode transistor coupled to the high-side input transistor, and a second high-side cascode transistor coupled to the first high-side cascode transistor and the output terminal. The low-side output circuit sinks current from the output terminal, and includes a low-side input transistor, a first low-side cascode transistor coupled to the low-side input transistor, and a second low-side cascode transistor coupled to the first low-side cascode transistor and the output terminal.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 10, 2021
    Inventors: Steven Graham BRANTLEY, Munaf Hussain SHAIK, Bhuvanesh RADHAKRISHNAN KULASEKARAN
  • Low voltage amplifier with gain boost circuit
    Patent number: 10566933
    Abstract: A class AB amplifier with improved DC gain. An amplifier includes an input stage and an output stage. The output stage is configured to amplify an output of the input stage. The output stage includes output transistors, class AB amplifier circuitry, minimum selector circuitry, and gain boost amplifier circuitry. The class AB amplifier circuitry includes a first transistor and a second transistor connected as a differential amplifier. The minimum selector circuitry is configured to control bias current in the output transistors by driving a control input of the first transistor. The gain boost amplifier circuitry is coupled to the class AB amplifier circuitry. The gain boost amplifier circuitry is configured to drive a common mode signal onto the control input of the first transistor and a control input of the second transistor, the common mode signal based on the output of the input stage.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: February 18, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Bhuvanesh Radhakrishnan Kulasekaran
  • LOW VOLTAGE AMPLIFIER WITH GAIN BOOST CIRCUIT
    Publication number: 20190140592
    Abstract: A class AB amplifier with improved DC gain. An amplifier includes an input stage and an output stage. The output stage is configured to amplify an output of the input stage. The output stage includes output transistors, class AB amplifier circuitry, minimum selector circuitry, and gain boost amplifier circuitry. The class AB amplifier circuitry includes a first transistor and a second transistor connected as a differential amplifier. The minimum selector circuitry is configured to control bias current in the output transistors by driving a control input of the first transistor. The gain boost amplifier circuitry is coupled to the class AB amplifier circuitry. The gain boost amplifier circuitry is configured to drive a common mode signal onto the control input of the first transistor and a control input of the second transistor, the common mode signal based on the output of the input stage.
    Type: Application
    Filed: December 13, 2018
    Publication date: May 9, 2019
    Inventor: Bhuvanesh RADHAKRISHNAN KULASEKARAN
  • Low voltage amplifier with gain boost circuit
    Patent number: 10187012
    Abstract: A class AB amplifier with improved DC gain. An amplifier includes an input stage and an output stage. The output stage is configured to amplify an output of the input stage. The output stage includes output transistors, class AB amplifier circuitry, minimum selector circuitry, and gain boost amplifier circuitry. The class AB amplifier circuitry includes a first transistor and a second transistor connected as a differential amplifier. The minimum selector circuitry is configured to control bias current in the output transistors by driving a control input of the first transistor. The gain boost amplifier circuitry is coupled to the class AB amplifier circuitry. The gain boost amplifier circuitry is configured to drive a common mode signal onto the control input of the first transistor and a control input of the second transistor, the common mode signal based on the output of the input stage.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: January 22, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Bhuvanesh Radhakrishnan Kulasekaran