Oscillation circuit, test apparatus and electronic device

Details Oscillation circuit, test apparatus and electronic device Oscillation circuit, test apparatus and electronic device

2011-01-04

2011-01-04

Kinkead, Arnold (Department: 2817)

Oscillators

Ring oscillators

C331S135000, C327S142000, C327S146000, C327S147000, C327S156000

Reexamination Certificate

active

07863990

ABSTRACT:
Provided is an oscillation circuit for generating an oscillation signal synchronized with a supplied reference clock, including: a voltage control oscillation section that, when triggered by each edge of the reference clock, stops oscillation of the oscillation signal having a frequency in accordance with a supplied control voltage to start new oscillation; a phase comparing section that compares a phase of a comparison signal that is in accordance with the oscillation signal outputted from the voltage control oscillation section and a phase of a signal that is in accordance with the reference clock; and a voltage control section that supplies the control voltage in accordance with a comparison result of the phase comparing section, to the voltage control oscillation section.

REFERENCES:
patent: 5757238 (1998-05-01), Ferraiolo et al.
patent: 2001/0019291 (2001-09-01), Nakano
patent: 2004/0247066 (2004-12-01), Suda
patent: 2005/0231291 (2005-10-01), Dally et al.
patent: 3-057008 (1991-03-01), None
patent: 4-368020 (1992-12-01), None
patent: 7-249965 (1995-09-01), None
patent: 9-074339 (1997-03-01), None
Korean Office Action for Korean Application No. 10-2008-7017484, mailed on May 28, 2010 (13 pages).

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