Title:
OSCILLATION CIRCUIT, TESTING APPARATUS AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/072731
Kind Code:
A1
Abstract:
An oscillation circuit which generates an oscillation signal synchronous with given
reference clock. The oscillation circuit is provided with a voltage controlled oscillation
section, which stops oscillation of an oscillation signal having a frequency
corresponding to a given control voltage by having each edge of the reference
clock as a trigger and starts new oscillation; a phase comparison section which
compares the phase of a comparison signal having a phase corresponding to the
oscillation signal outputted from the voltage controlled oscillation section
with a phase of a signal having a phase corresponding to the reference clock; and
a voltage control section which supplies the voltage controlled oscillation section
with a control voltage corresponding to the comparison results obtained from
the phase comparison section.
Inventors:
SUDA MASAKATSU (JP)
Application Number:
PCT/JP2006/324951
Publication Date:
June 28, 2007
Filing Date:
December 14, 2006
Export Citation:
Assignee:
ADVANTEST CORP (JP)
SUDA MASAKATSU (JP)
SUDA MASAKATSU (JP)
International Classes:
H03K3/03; H03K5/00; H03L7/099
Foreign References:
| JPH0974339A | 1997-03-18 | |||
| JPH0357008A | 1991-03-12 | |||
| JPH04368020A | 1992-12-21 | |||
| JPH07249965A | 1995-09-26 |
Attorney, Agent or Firm:
RYUKA, Akihiro (22-1 Nishi-Shinjuku 6-chome, Shinjuku-k, Tokyo 05, JP)
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