Patents by Inventor Yanjuan Liu

Yanjuan Liu 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).

  • Digital correction circuit for a pipelined analog-to-digital converter
    Patent number: 8749413
    Abstract: A digital correction circuit for a pipelined analog-to-digital converter (ADC) is disclosed. Compared to the conventional digital correction circuit which uses adders to perform operations in ADC digital correction part and hence needs a rather long operation time, the digital correction circuit of this invention can reduce the time needed in operations in the finial digital correction circuits and thus can optimize operation time, by allocating the operations to a plurality of pipeline stages of second sub-circuits configured to synchronize digital codes, each of which can perform part of the operations only with NAND gates, NOR gates, phase inverters and D-type flip-flops, without needing to use adders.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 10, 2014
    Assignee: Shanghai Hua Hong NEC Electronics Co., Ltd.
    Inventors: Hongwei Zhu, Yanjuan Liu, Min Tang, Guojun Liu
  • DIGITAL CORRECTION CIRCUIT FOR A PIPELINED ANALOG-TO-DIGITAL CONVERTER
    Publication number: 20130257635
    Abstract: A digital correction circuit for a pipelined analog-to-digital converter (ADC) is disclosed. Compared to the conventional digital correction circuit which uses adders to perform operations in ADC digital correction part and hence needs a rather long operation time, the digital correction circuit of this invention can reduce the time needed in operations in the finial digital correction circuits and thus can optimize operation time, by allocating the operations to a plurality of pipeline stages of second sub-circuits configured to synchronize digital codes, each of which can perform part of the operations only with NAND gates, NOR gates, phase inverters and D-type flip-flops, without needing to use adders.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 3, 2013
    Applicant: SHANGHAI HUA HONG NEC ELECTRONICS CO., LTD.
    Inventors: Hongwei Zhu, Yanjuan Liu, Min Tang, Guojun Liu