Title:
MULTI-PHASE OSCILLATOR
Document Type and Number:
WIPO Patent Application WO/2007/063965
Kind Code:
A1
Abstract:
A multi-phase oscillator includes: a plurality of ring oscillators (21) each
having a plurality of output ports and each formed by an odd number of inverters
(20) connected in a ring; shape; and a plurality of resistance elements (30) for
connecting the output ports of the ring oscillators (21) so that all the ring oscillators
(21) operate with the same frequency and operate while maintaining a desired
phase relationship. The number of ring oscillators (21) is not limited to an odd
number but may be an even number. By using the resistance elements (30) as the phase
connection elements, the state of the phase connection destination may be changed
into the direction matched with the state of the phase connection source. When
resistors are used as the resistance elements (30), the phase output accuracy
is significantly increased and it is possible to obtain a high-frequency oscillation.
Inventors:
WATANABE SEIJI
OKA TAKASHI
ARAKAWA TETSUO
OKA TAKASHI
ARAKAWA TETSUO
Application Number:
PCT/JP2006/324001
Publication Date:
June 07, 2007
Filing Date:
November 30, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
WATANABE SEIJI
OKA TAKASHI
ARAKAWA TETSUO
WATANABE SEIJI
OKA TAKASHI
ARAKAWA TETSUO
International Classes:
H03K3/03; H03K3/354; H03K5/15
Foreign References:
| JPH0870239A | 1996-03-12 | |||
| JPH1174762A | 1999-03-16 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (5-7 Hommachi 2-chome, Chuo-k, Osaka-shi Osaka 53, JP)
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