Patents by Inventor John H. Bui

John H. Bui 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: 12470220
    Abstract: A level-shift buffer device includes an input buffer circuit, a configurable circuit and a level-shift circuit. The input buffer circuit receives input/output (I/O) supply voltage at a first voltage level among a plurality of voltage levels that are supported by the level-shift buffer device. The input buffer circuit generates a first input signal according to the first voltage level of the I/O supply voltage. The configuration circuit controls at least one transistor of the configurable circuit according to the configuration signal to generate a second input signal. The level-shift circuit generates an output signal at a second voltage level according to the second input signal and the configuration signal, wherein the level-shift circuit functions as an inverter or a level shifter in accordance with the configuration signal.
    Type: Grant
    Filed: March 28, 2024
    Date of Patent: November 11, 2025
    Assignee: Winbond Electronics Corp.
    Inventors: John H. Bui, Poongyeub Lee
  • Publication number: 20250309897
    Abstract: A level-shift buffer device includes an input buffer circuit, a configurable circuit and a level-shift circuit. The input buffer circuit receives input/output (I/O) supply voltage at a first voltage level among a plurality of voltage levels that are supported by the level-shift buffer device. The input buffer circuit generates a first input signal according to the first voltage level of the I/O supply voltage. The configuration circuit controls at least one transistor of the configurable circuit according to the configuration signal to generate a second input signal. The level-shift circuit generates an output signal at a second voltage level according to the second input signal and the configuration signal, wherein the level-shift circuit functions as an inverter or a level shifter in accordance with the configuration signal.
    Type: Application
    Filed: March 28, 2024
    Publication date: October 2, 2025
    Applicant: Winbond Electronics Corp.
    Inventors: John H. Bui, Poongyeub Lee
  • Patent number: 12126333
    Abstract: In an aspect, the disclosure is directed to an electrical circuit which includes not limited to: a first bonding pad having a bias voltage, a voltage pull-up circuit configured to set the bias voltage of the first bonding pad to a high voltage, a voltage pull-down circuit configured to switch bias voltage of the first bonding pad from the high voltage to a low voltage in response to the voltage pull-down circuit receiving a first control signal which activates the voltage-pull down circuit, a rise time delay control circuit configured to control a rise time of the bias voltage of the first bonding pad, wherein the bias voltage of the first bonding pad starts to rise in response to the first control signal deactivating the voltage pull-down circuit, and a driving circuit configured to drive a second control signal to activate the driving circuit.
    Type: Grant
    Filed: March 31, 2023
    Date of Patent: October 22, 2024
    Assignee: Winbond Electronics Corp.
    Inventor: John H. Bui
  • Publication number: 20240333283
    Abstract: In an aspect, the disclosure is directed to an electrical circuit which includes not limited to: a first bonding pad having a bias voltage, a voltage pull-up circuit configured to set the bias voltage of the first bonding pad to a high voltage, a voltage pull-down circuit configured to switch bias voltage of the first bonding pad from the high voltage to a low voltage in response to the voltage pull-down circuit receiving a first control signal which activates the voltage-pull down circuit, a rise time delay control circuit configured to control a rise time of the bias voltage of the first bonding pad, wherein the bias voltage of the first bonding pad starts to rise in response to the first control signal deactivating the voltage pull-down circuit, and a driving circuit configured to drive a second control signal to activate the driving circuit.
    Type: Application
    Filed: March 31, 2023
    Publication date: October 3, 2024
    Applicant: Winbond Electronics Corp.
    Inventor: John H. Bui
  • Patent number: 7453299
    Abstract: Programmable dynamic amplifiers with hysteresis are provided. The hysteretic amplifiers have a first input voltage threshold when the output voltage is at a high voltage and a second input voltage threshold when the output voltage is at a low voltage. A multiplexer controls the hysteretic threshold voltages in response to the output signal of the amplifier. The hysteretic amplifiers can be programmed to have positive or negative hysteresis. When the amplifier is programmed with positive hysteresis, the output voltage transitions after the input voltages have both reached a common voltage value. When the amplifier is programmed with negative hysteresis, the output voltage transitions before the input voltages have both reached a common voltage value.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: November 18, 2008
    Assignee: Altera Corporation
    Inventor: John H. Bui
  • Patent number: 7352221
    Abstract: Programmable dynamic amplifiers with hysteresis are provided. The hysteretic amplifiers have a first input voltage threshold when the output voltage is at a high voltage and a second input voltage threshold when the output voltage is at a low voltage. A multiplexer controls the hysteretic threshold voltages in response to the output signal of the amplifier. The hysteretic amplifiers can be programmed to have positive or negative hysteresis. When the amplifier is programmed with positive hysteresis, the output voltage transitions after the input voltages have both reached a common voltage value. When the amplifier is programmed with negative hysteresis, the output voltage transitions before the input voltages have both reached a common voltage value.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: April 1, 2008
    Assignee: Altera Corporation
    Inventor: John H. Bui
  • Patent number: 7109770
    Abstract: Programmable dynamic amplifiers with hysteresis are provided. The hysteretic amplifiers have a first input voltage threshold when the output voltage is at a high voltage and a second input voltage threshold when the output voltage is at a low voltage. A multiplexer controls the hysteretic threshold voltages in response to the output signal of the amplifier. The hysteretic amplifiers can be programmed to have positive or negative hysteresis. When the amplifier is programmed with positive hysteresis, the output voltage transitions after the input voltages have both reached a common voltage value. When the amplifier is programmed with negative hysteresis, the output voltage transitions before the input voltages have both reached a common voltage value.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: September 19, 2006
    Assignee: Altera Corporation
    Inventor: John H. Bui
  • Patent number: 6975135
    Abstract: Output buffers are provided that are compatible with any differential output standard. The output buffers compensate for variations in process, the supply voltage, and temperature. The edge rate of an output buffer can be programmed to be compatible with different output standards. The edge rate of an output buffer can compensate for variations in process, voltage, and temperature. The output voltage of an output buffer can be adjusted to be compatible with different output standards.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: December 13, 2005
    Assignee: Altera Corporation
    Inventor: John H. Bui