Title:
PHASE DETERMINING DEVICE AND FREQUENCY DETERMINING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/098460
Kind Code:
A1
Abstract:
Provided is a phase determining device capable of determining phase differences with high precision using digital circuits. A phase determining device (1) comprises a buffer delay determining circuit (110), a phase difference determining circuit (120), both of which use TDCs, and a phase difference calculating unit (12). The buffer delay determining circuit (110) generates, from a highly precise clock signal (CLK) and a sampling reference signal (SCL), a delay determination data (Ds) representative of a delay amount (τB) between the buffers of the TDC. The phase difference determining circuit (120) uses the clock signal (CLK) to generate a number data sequence (Dt) and first and second phase difference determination data (Ds(A), Ds(B)) all of which are representative of the phase difference between signals (SS(A), SS(B)) that are to be determined. The phase difference calculating unit (12) calculates the phase difference using: numbers of state data (NB(A), NB(B)) based on the first and second phase difference determination data (Ds(A), Ds(B)); the number data sequence (Dt); and the highly precise delay amount (τB) derived from the delay determination data (Ds).
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Inventors:
MIYAHARA KAZUNORI (JP)
Application Number:
PCT/JP2010/053144
Publication Date:
September 02, 2010
Filing Date:
February 26, 2010
Export Citation:
Assignee:
FURUNO ELECTRIC CO (JP)
MIYAHARA KAZUNORI (JP)
MIYAHARA KAZUNORI (JP)
International Classes:
G01R23/10; G01R29/02; G01R25/04
Domestic Patent References:
| WO2008108374A1 | 2008-09-12 | |||
| WO2007093221A1 | 2007-08-23 |
Foreign References:
| JP2000286698A | 2000-10-13 | |||
| JPH10111369A | 1998-04-28 | |||
| JPH07229979A | 1995-08-29 | |||
| JP2002334434A | 2002-11-22 |
Other References:
KAZUYA KATANO, YUJI YAMAGUCHI: "Time: Measuring Technique of Time and Frequency", MEASUREMENT AND CONTROL, vol. 44, no. 10, October 2005 (2005-10-01)
See also references of EP 2402772A4
See also references of EP 2402772A4
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