Patents by Inventor Chandra Prakash Tiwari

Chandra Prakash Tiwari 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: 11405037
    Abstract: A driver circuit of a voltage translator includes a bias voltage generator, a drive voltage generator, an output voltage generator, and a filter circuit. The bias voltage generator is configured to receive a supply voltage, a first input voltage, and a feedback voltage, and generate a bias voltage. The feedback voltage controls an amplitude of the bias voltage. The drive voltage generator is configured to receive the supply voltage, the first input voltage, and the bias voltage, and generate a drive voltage. The output voltage generator is configured to receive the supply voltage, a second input voltage, and the drive voltage, and generate an output voltage. The drive voltage controls a slew rate of the output voltage. The filter circuit is configured to receive the output voltage, and generates and provides the feedback voltage to the bias voltage generator.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: August 2, 2022
    Assignee: NXP B.V.
    Inventor: Chandra Prakash Tiwari
  • Publication number: 20220200596
    Abstract: A driver circuit of a voltage translator includes a bias voltage generator, a drive voltage generator, an output voltage generator, and a filter circuit. The bias voltage generator is configured to receive a supply voltage, a first input voltage, and a feedback voltage, and generate a bias voltage. The feedback voltage controls an amplitude of the bias voltage. The drive voltage generator is configured to receive the supply voltage, the first input voltage, and the bias voltage, and generate a drive voltage. The output voltage generator is configured to receive the supply voltage, a second input voltage, and the drive voltage, and generate an output voltage. The drive voltage controls a slew rate of the output voltage. The filter circuit is configured to receive the output voltage, and generates and provides the feedback voltage to the bias voltage generator.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 23, 2022
    Inventor: Chandra Prakash Tiwari
  • Patent number: 10659051
    Abstract: A voltage translator having first and second one-shots shifts a voltage level of a first voltage signal to generate a second voltage signal, and vice-versa. The first one-shot generates a first driver signal when the first voltage signal goes from low to high based on a time duration for which the first voltage signal remains high. The second voltage signal is generated based on the first driver signal. Similarly, the second one-shot generates the first voltage signal when the second voltage signal goes from a low to high based on a time duration for which the second voltage signal remains high.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 19, 2020
    Assignee: NXP USA, Inc.
    Inventor: Chandra Prakash Tiwari
  • Patent number: 10566975
    Abstract: A bi-directional level translator with fast rise and fall times and low current leakage is suitable for use with devices connected using a SPMI bus. The level translator passes signals between first and second voltage domains that operate at different voltage levels. The level translator has a first terminal that receives a first signal A from the first voltage domain and outputs a second signal B to the second voltage domain. A second terminal receives the second signal B and outputs the first signal A. A first switch is located between the first voltage source and the first terminal and a second switch is located between the second voltage source and the second terminal. The first and second switches are operable to reduce current leakage of the level translator.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: February 18, 2020
    Assignee: NXP B.V.
    Inventors: Chandra Prakash Tiwari, Anand Shirwal
  • Patent number: 10181852
    Abstract: A bidirectional voltage translator shifts a voltage level of a first voltage signal to generate a second voltage signal, and vice-versa. The voltage translator includes first and second I/O terminals for receiving and outputting the first and second voltage signals, respectively, and first and second one-shot circuits connected to first and second output transistors, respectively. The outputs of the transistors are connected to the first and second I/O terminals, respectively, and also are fed back to the respective one-shot circuits. When the output of the voltage translator has a high slew-rate, the one of the first and second one-shot circuits that corresponds to the output modulates the gate voltage of the corresponding output transistor based on the feedback signal to control the slew-rate of the output.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: January 15, 2019
    Assignee: NXP B.V.
    Inventors: Chandra Prakash Tiwari, Michael Joehren
  • Patent number: 9967946
    Abstract: For an LED lighting application, overshoot-protection circuitry prevents an LED controller, such as a matrix lighting controller (MLC) that controls an array of LEDs, from falsely detecting an open-circuit condition in an LED controlled by the LED controller, by limiting the magnitude of an overshoot voltage (due to long-wire parasitic inductances) from occurring when a switch in the LED controller that is used to control the LED is turned off.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: May 8, 2018
    Assignee: NXP B.V.
    Inventors: Chandra Prakash Tiwari, Hendrik Boezen, Henricus Cornelis Johannes B├╝thker