Patent · US Expired

Phase-locked sampling of a periodic signal

US4646004A · kind A · utility

8Cited by
6References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 12, 1985
Grant dateFeb 24, 1987
Priority date—
Expiry dateJun 12, 2005

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R23/15
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method for phase-locked sampling measurement of a periodically varying quantity. The samples are designated g(I) . . . g(I-n) and may comprise one complete period or a half of one period. The method involves adapting the sampling frequency and the sample position in relation to the quantity to be measured such that phase locking is attained, and this is done by controlling the time interval between sampling. Whether the sampling frequency needs to be increased, left unchanged or be decreased, depends on a number of decisions depending on the values of samples g(I) and g(I)-g(I-n). A device for carrying out the method is also described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.