Patents by Inventor Haojiong LI

Haojiong LI 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).

  • Reference voltage temperature coefficient calibration circuit and method
    Patent number: 9977111
    Abstract: The present invention relates to a reference voltage temperature coefficient calibration circuit. The circuit comprises: an operational amplifier comprising an input pair transistor, a load pair transistor, and a bias current source, an inverted input terminal of the operational amplifier being connected to an output terminal of the operational amplifier; and an adjustable current module connected in parallel to the load pair transistor, the adjustable current module being configured to generate an adjusting current, the adjusting current being used to adjust an offset current flowing through the input pair transistor, wherein the adjusting current is related to a current of the bias current source and an order of Kelvin temperature. The present invention is applicable to calibration of first-order to high-order temperature coefficients of a reference voltage in a circuit, and has universality.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: May 22, 2018
    Assignee: KT MICRO, INC.
    Inventor: Haojiong Li
  • REFERENCE VOLTAGE TEMPERATURE COEFFICIENT CALIBRATION CIRCUIT AND METHOD
    Publication number: 20160187207
    Abstract: The present invention relates to a reference voltage temperature coefficient calibration circuit. The circuit comprises: an operational amplifier comprising an input pair transistor, a load pair transistor, and a bias current source, an inverted input terminal of the operational amplifier being connected to an output terminal of the operational amplifier; and an adjustable current module connected in parallel to the load pair transistor, the adjustable current module being configured to generate an adjusting current, the adjusting current being used to adjust an offset current flowing through the input pair transistor, wherein the adjusting current is related to a current of the bias current source and an order of absolute temperature. The present invention is applicable to calibration of first-order to high-order temperature coefficients of a reference voltage in a circuit, and has universality.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 30, 2016
    Applicant: KT MICRO, INC.
    Inventor: Haojiong LI