Patents by Inventor Wenhuan Yu

Wenhuan Yu 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: 9729162
    Abstract: In one form, a signal chain circuit includes a signal chain processing circuit between an input for receiving a differential input signal having a first common-mode voltage, and an output for providing a differential output signal having a second, different common-mode voltage. It includes an amplifier with a differential output stage coupled to a differential input stage and having positive and negative output terminals forming its output, and positive and negative feedback terminals. The differential output stage provides a first voltage drop between the positive output terminal and the positive feedback terminal, and a second voltage drop between the negative output terminal and the negative feedback terminal. The common-mode feedback circuit regulates a common-mode voltage between the positive and negative feedback terminals to the second common-mode voltage.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 8, 2017
    Inventors: Wenhuan Yu, Abdulkerim L. Coban
  • Patent number: 8854130
    Abstract: Techniques are disclosed relating to peak detection. In one embodiment, an apparatus is disclosed that includes an amplifier configured to amplify a signal. The apparatus further includes a peak detector DC coupled to an output of the amplifier. The peak detector includes a first comparator stage configured to perform subtraction of a threshold signal from the amplified signal. The peak detector further includes a second comparator stage is configured to amplify a differential output signal of the first comparator stage indicative of a result of the subtraction. In some embodiments, the amplifier and peak detector are included within automatic gain control system in a path for an in-phase or quadrature channel of the receiver chain.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: October 7, 2014
    Assignee: Silicon Laboratories Inc.
    Inventors: Abdulkarim Coban, Wenhuan Yu
  • Publication number: 20130342274
    Abstract: Techniques are disclosed relating to peak detection. In one embodiment, an apparatus is disclosed that includes an amplifier configured to amplify a signal. The apparatus further includes a peak detector DC coupled to an output of the amplifier. The peak detector includes a first comparator stage configured to perform subtraction of a threshold signal from the amplified signal. The peak detector further includes a second comparator stage is configured to amplify a differential output signal of the first comparator stage indicative of a result of the subtraction. In some embodiments, the amplifier and peak detector are included within automatic gain control system in a path for an in-phase or quadrature channel of the receiver chain.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 26, 2013
    Inventors: Abdulkarim Coban, Wenhuan Yu
  • Patent number: 8406371
    Abstract: Programmable divider circuitry is disclosed that utilizes two cascaded divider cells to generate division ratios from 4 to 7 and utilizes an output signal from one of the divider cells to sample and synchronize the divider output signal. The operation of the programmable divider circuitry improves the consistency of duty cycles generated across the different division ratios. Further techniques are also applied to make more consistent the duty cycles depending upon the division ratio selected.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: March 26, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Francesco Barale, Mustafa H. Koroglu, Wenhuan Yu