Patents by Inventor Kai KWAN

Kai KWAN 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: 12199606
    Abstract: A level shifter, configured to shift an input voltage swing from a first voltage range to a second voltage range, comprising a first stage and a switching stage, with circuitry configured in isolation wells. The first stage includes a first stage input receiving an input signal that swings between a first voltage value and a second voltage, a buffer configured to shift the input signal to vary between a third value and a fourth value, and a first stage output configured to present a first stage output signal. The switching stage comprises switching stage inputs, configured to receive the first stage output signal, switch drivers, and switching devices configured to, responsive to the driver output, generate a switching stage output signal that is a shifted version of the input signal. The switching stage output signal ranges between a fifth voltage value and a sixth voltage value.
    Type: Grant
    Filed: May 16, 2023
    Date of Patent: January 14, 2025
    Assignee: MACOM Technology Solutions Holdings, Inc.
    Inventors: David Kenneth Lacombe, Kai Kwan, Quazi Ikram, Cristiano Bazzani
  • Publication number: 20240388292
    Abstract: A level shifter, configured to shift an input voltage swing from a first voltage range to a second voltage range, comprising a first stage and a switching stage, with circuitry configured in isolation wells. The first stage includes a first stage input receiving an input signal that swings between a first voltage value and a second voltage, a buffer configured to shift the input signal to vary between a third value and a fourth value, and a first stage output configured to present a first stage output signal. The switching stage comprises switching stage inputs, configured to receive the first stage output signal, switch drivers, and switching devices configured to, responsive to the driver output, generate a switching stage output signal that is a shifted version of the input signal. The switching stage output signal ranges between a fifth voltage value and a sixth voltage value.
    Type: Application
    Filed: May 16, 2023
    Publication date: November 21, 2024
    Inventors: David Kenneth Lacombe, Kai Kwan, Quazi Ikram, Cristiano Bazzani
  • Patent number: 8704596
    Abstract: An amplifier arrangement constituted of: a first input lead; a second input lead; a difference amplifier; a first buffer, the input of the first buffer coupled to the first input lead, the output of the first buffer coupled to a first input of the difference amplifier; a second buffer, the input of the second buffer coupled to the second input lead, the output of the second buffer coupled to a second input of the difference amplifier; and a transconductance amplifier, the non-inverting input and the non-inverted output of the transconductance amplifier coupled to the first input of the difference amplifier, the inverting input and the inverted output of the transconductance amplifier coupled to the second input of the difference amplifier. The input signals are thus buffered and the offset of the buffers are compensated for.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: April 22, 2014
    Assignee: Microsemi Corporation
    Inventors: Kai Kwan, Peter Kim
  • Patent number: 8493049
    Abstract: A power converter constituted of: a reference source; a clock generator exhibiting a variable frequency output, the value of the frequency of the variable frequency output responsive to an external resistor value; and an error amplifier in communication with the reference source, the error amplifier exhibiting a gain whose value is responsive to the external resistor value. Preferably the error amplifier is a transconductance amplifier. In one embodiment the power converter further exhibits a current squarer, arranged to produce a squared value of a current whose value is responsive to the external resistor and provide the squared value to the transconductance amplifier.
    Type: Grant
    Filed: December 5, 2010
    Date of Patent: July 23, 2013
    Assignee: Microsemi Corporation
    Inventors: Kai Kwan, Peter Kim
  • Publication number: 20120326785
    Abstract: An amplifier arrangement constituted of: a first input lead; a second input lead; a difference amplifier; a first buffer, the input of the first buffer coupled to the first input lead, the output of the first buffer coupled to a first input of the difference amplifier; a second buffer, the input of the second buffer coupled to the second input lead, the output of the second buffer coupled to a second input of the difference amplifier; and a transconductance amplifier, the non-inverting input and the non-inverted output of the transconductance amplifier coupled to the first input of the difference amplifier, the inverting input and the inverted output of the transconductance amplifier coupled to the second input of the difference amplifier. The input signals are thus buffered and the offset of the buffers are compensated for.
    Type: Application
    Filed: May 3, 2012
    Publication date: December 27, 2012
    Applicant: MICROSEMI CORPORATION
    Inventors: Kai KWAN, Peter KIM
  • Publication number: 20110148381
    Abstract: A power converter constituted of: a reference source; a clock generator exhibiting a variable frequency output, the value of the frequency of the variable frequency output responsive to an input signal; and an error amplifier in communication with the reference source, the error amplifier exhibiting a gain whose value is responsive to the input signal. Preferably the error amplifier is a transconductance amplifier. In one embodiment the power converter further exhibits a current squarer, arranged to produce a squared value of the input signal and provide the squared value to the transconductance amplifier.
    Type: Application
    Filed: December 5, 2010
    Publication date: June 23, 2011
    Applicant: MICROSEMI CORPORATION
    Inventors: Kai KWAN, Peter KIM