Invention Grant
US09331678B2 Local oscillator signal generation 有权
本地振荡器信号产生

  • Patent Title: Local oscillator signal generation
  • Patent Title (中): 本地振荡器信号产生
  • Application No.: US14077912
    Application Date: 2013-11-12
  • Publication No.: US09331678B2
    Publication Date: 2016-05-03
  • Inventor: Jean-Robert Tourret
  • Applicant: NXP B.V.
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Priority: EP12290430 20121210
  • Main IPC: H03K3/037
  • IPC: H03K3/037 H03L7/081 H03B19/00
Local oscillator signal generation
Abstract:
A local oscillator signal generation circuit for a frequency divider circuit is disclosed. The local oscillator signal generation circuit includes a delay device adapted to delay a data signal according to a control signal, a data flip-flop having the delayed data signal provided to its data input terminal and a reference clocking signal provided to its clock input terminal and a control circuit adapted to generate first and second partially overlapping pulse windows from the delayed data signal and to generate a control signal based on the first and second partially overlapping pulse windows and the reference clocking signal. The control signal is provided to the delay device to control the amount by which the data signal is delayed so that the data signal is stable when it is sampled by the data flip-flop. A local oscillator signal is derived from the output of the data flip-flop.
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