Title:
DIGITALLY CONTROLLED OSCILLATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/093312
Kind Code:
A1
Abstract:
A measurement unit (3) generates, at every period of a reference clock, a period measured value representing the period of the reference clock as a number of passage stages, which is the number of stages at which a circulating signal passes a delay element of a ring oscillator (2). A generation unit (8) counts the number of passage stages, and generates an output pulse signal at a timing when the number reaches a set count value. A calculation unit (6) calculates the number of repetitions on the basis of the value of an integer part of a period set value, and calculates an adjusted value on the basis of the value of a decimal part of the period set value and the period measured value. Every time the output of the output pulse signal at a coarse adjustment timing generated by means of the period measured value is repeated a number of times equal to the number of repetitions, an updating unit (7) updates the set count value such that the output of the output pulse signal at a fine adjustment timing generated by means of the adjusted value is performed once.
Inventors:
YAMAUCHI SHIGENORI (JP)
Application Number:
PCT/JP2018/041149
Publication Date:
May 16, 2019
Filing Date:
November 06, 2018
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H03K5/00
Foreign References:
| JP2017022490A | 2017-01-26 | |||
| JP2015015577A | 2015-01-22 | |||
| JP2009152886A | 2009-07-09 | |||
| JP2000357947A | 2000-12-26 | |||
| JPH07283722A | 1995-10-27 |
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (JP)
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