Patents by Inventor Jeremy H. Wong

Jeremy H. Wong 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).

  • Notch filter for ripple reduction
    Patent number: 9685933
    Abstract: A notch filter is controlled synchronously with a chopper to filter out chopping ripple. In one embodiment, the notch filter is coupled to the differential output of the chopper and includes a sampling capacitor, a hold capacitor, and a second set of switches between the sampling capacitor and the hold capacitor. The second set of switches is temporarily closed once per chopper switching cycle to transfer charge from the sampling capacitor to the hold capacitor such that the ripple from the chopper is not transferred to the hold capacitor. The voltage across the hold capacitor may be coupled to any other circuit, such as to the differential inputs of an amplifier.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: June 20, 2017
    Assignee: Linear Technology Corporation
    Inventors: Jeremy H. Wong, Joseph G. Petrofsky
  • NOTCH FILTER FOR RIPPLE REDUCTION
    Publication number: 20160056707
    Abstract: A notch filter is controlled synchronously with a chopper to filter out chopping ripple. In one embodiment, the notch filter is coupled to the differential output of the chopper and includes a sampling capacitor, a hold capacitor, and a second set of switches between the sampling capacitor and the hold capacitor. The second set of switches is temporarily closed once per chopper switching cycle to transfer charge from the sampling capacitor to the hold capacitor such that the ripple from the chopper is not transferred to the hold capacitor. The voltage across the hold capacitor may be coupled to any other circuit, such as to the differential inputs of an amplifier.
    Type: Application
    Filed: March 26, 2015
    Publication date: February 25, 2016
    Inventors: Jeremy H. Wong, Joseph G. Petrofsky
  • Notch filter for ripple reduction
    Patent number: RE48112
    Abstract: A notch filter is controlled synchronously with a chopper to filter out chopping ripple. In one embodiment, the notch filter is coupled to the differential output of the chopper and includes a sampling capacitor, a hold capacitor, and a second set of switches between the sampling capacitor and the hold capacitor. The second set of switches is temporarily closed once per chopper switching cycle to transfer charge from the sampling capacitor to the hold capacitor such that the ripple from the chopper is not transferred to the hold capacitor. The voltage across the hold capacitor may be coupled to any other circuit, such as to the differential inputs of an amplifier.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: July 21, 2020
    Assignee: Linear Technology LLC
    Inventors: Jeremy H. Wong, Joseph G. Petrofsky