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).

  • Programmable amplifiers with positive and negative hysteresis
    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
  • Programmable amplifiers with positive and negative hysteresis
    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
  • Programmable amplifiers with positive and negative hysteresis
    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
  • Universally programmable output buffer
    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