Patents by Inventor Chin Yeong Koh

Chin Yeong Koh 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).

  • Reset-free delay-locked loop
    Patent number: 7298191
    Abstract: A delay locked loop (DLL) includes a delay unit configured to delay an input clock signal by a specified amount to produce a delayed clock signal. A phase detector receives as input the input clock signal and the delayed clock signal and outputs a signal proportional to the phase difference between the input clock signal and the delayed clock signal to provide a control voltage for adjusting the delay to the specified amount. A pulse swallower removes a pulse from the input clock signal or from the delayed clock signal to reverse the direction of the control signal.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: November 20, 2007
    Assignee: Infineon Technologies AG
    Inventors: Hai Jie Wu, Kiat How Tan, Chin Yeong Koh
  • Reset-free delay-locked loop
    Publication number: 20060132205
    Abstract: A delay locked loop (DLL) includes a delay unit configured to delay an input clock signal by a specified amount to produce a delayed clock signal. A phase detector receives as input the input clock signal and the delayed clock signal and outputs a signal proportional to the phase difference between the input clock signal and the delayed clock signal to provide a control voltage for adjusting the delay to the specified amount. A pulse swallower removes a pulse from the input clock signal or from the delayed clock signal to reverse the direction of the control signal.
    Type: Application
    Filed: February 14, 2006
    Publication date: June 22, 2006
    Inventors: Hai Jie Wu, Kiat How Tan, Chin Yeong Koh