Patents by Inventor Larry Baoqi Li

Larry Baoqi 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).

  • Charge pump with low charge injection and low clock feed-through
    Patent number: 7888980
    Abstract: A charge pump with low charge injection and low clock feed-through for a phase locked loop (PLL). A first source-switched current mirror has a source transistor and an output transistor. The source transistor has a drain connected to a first current source. The output transistor has a drain connected to an output of the charge pump. The gates of the source and output transistors are coupled together by a first conductive link. A switch is coupled between a supply voltage source and a source of the output transistor of the current mirror. A tuner is coupled between the switch and the output transistor of the current mirror. A source of the tuner is coupled to a drain of the switch and to the source of the output transistor. A drain of the tuner is coupled to the first conductive link between the source and output transistors of the current mirror.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: February 15, 2011
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Larry Baoqi Li, Huaimao Sheng
  • CHARGE PUMP WITH LOW CHARGE INJECTION AND LOW CLOCK FEED-THROUGH
    Publication number: 20110012653
    Abstract: A charge pump with low charge injection and low clock feed-through for a phase locked loop (PLL). A first source-switched current mirror has a source transistor and an output transistor. The source transistor has a drain connected to a first current source. The output transistor has a drain connected to an output of the charge pump. The gates of the source and output transistors are coupled together by a first conductive link. A switch is coupled between a supply voltage source and a source of the output transistor of the current mirror. A tuner is coupled between the switch and the output transistor of the current mirror. A source of the tuner is coupled to a drain of the switch and to the source of the output transistor. A drain of the tuner is coupled to the first conductive link between the source and output transistors of the current mirror.
    Type: Application
    Filed: July 20, 2009
    Publication date: January 20, 2011
    Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.
    Inventors: Larry Baoqi Li, Huaimao Sheng