• Patent Title: HIGH RESOLUTION TIME CAPTURE CIRCUIT AND CORRESPONDING DEVICE, CAPTURE METHOD AND COMPUTER PROGRAM PRODUCT
  • Application No.: US16851988
    Application Date: 2020-04-17
  • Publication No.: US20200341505A1
    Publication Date: 2020-10-29
  • Inventor: Giuseppe D'Angelo
  • Applicant: STMicroelectronics S.r.l.
  • Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@7a8edf53
  • Main IPC: G06F1/08
  • IPC: G06F1/08 H03K5/159 H03K21/02 G04F10/04
HIGH RESOLUTION TIME CAPTURE CIRCUIT AND CORRESPONDING DEVICE, CAPTURE METHOD AND COMPUTER PROGRAM PRODUCT
Abstract:
A time capture circuit can measure time between edges of a logic input signal. A delay line generates consecutive increasingly delayed replicas of the logic input signal. A free running counter is clocked by a counter clock signal corresponding to an external clock signal multiplied by a clock scale factor. A counter value capture circuit captures the counter value upon occurrence of an edge in the input signal, outputs a captured counter value, and issues a trigger signal. A decoder determines a decoded value based on values of the input signal and of the plurality of consecutive increasingly replicas when the trigger signal is issued and computes a capture value as the difference of the captured counter value logical left shifted by a first scale factor and the decoded value logical right shifted by a second scale factor.
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