Invention Grant
US08379765B2 Amplitude monitor for high-speed signals 有权
幅度监视器用于高速信号

  • Patent Title: Amplitude monitor for high-speed signals
  • Patent Title (中): 幅度监视器用于高速信号
  • Application No.: US13296193
    Application Date: 2011-11-14
  • Publication No.: US08379765B2
    Publication Date: 2013-02-19
  • Inventor: Ramin Farjad-Rad
  • Applicant: Ramin Farjad-Rad
  • Applicant Address: US CA Sunnyvale
  • Assignee: Rambus Inc.
  • Current Assignee: Rambus Inc.
  • Current Assignee Address: US CA Sunnyvale
  • Main IPC: H03K9/00
  • IPC: H03K9/00
Amplitude monitor for high-speed signals
Abstract:
A serial communication system includes a receiver with an amplitude monitor. The amplitude monitor compares the input signal with a reference level in response to a sample clock. The sample clock is periodically phase shifted with respect to the incoming data so the amplitude monitor is sure to sample an incoming data eye at or near the peak amplitude over a selected sample period. The amplitude detector notes the detection of an input signal if the input signal surpasses the reference level for any sample phase. The amplitude monitor experiments with different sample-clock phases over a number of data symbols, but is capable of measuring amplitude fast enough to resolve amplitude-based signals used for rate negotiation.
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