Title:
REACTANCE ADJUSTMENT DEVICE, TRANSCEIVER AND TRANSMISSION DEVICE USING THE SAME, SIGNAL PROCESSING CIRCUIT SUITABLE FOR THEM, REACTANCE ADJUSTMENT METHOD, TRANSMISSION METHOD, AND RECEPTION METHOD
Document Type and Number:
WIPO Patent Application WO/2005/060131
Kind Code:
A1
Abstract:
A reactance adjustment device includes: an electrode (123) for inducing an electric field in an electric field transmission medium (121); a resonator (7) for adjusting the reactance value; and adjustment signal generator (13) for alternately outputting a high-level signal and a low-level signal to the resonator (7); an electric field detector (15) for generating an electric signal based on the electric field in the electric field transmission medium (121); first electric charge accumulation means (C1) for accumulating electric charge in accordance with the electric signal when the adjustment signal generator (13) outputs a high-level signal; second electric charge accumulation means (C2) for accumulating electric charge in accordance with the electric signal when the adjustment signal generator (13) outputs a low-level signal; a voltage comparator (10) for outputting a predetermined signal in accordance with the voltage difference; and a control unit (19) for outputting to the resonator (7), voltage of a constant voltage value while electric charge is accumulated in the first or the second electric charge accumulation means (C1, C2) and voltage based on a predetermined signal when the electric charge accumulation is complete.
Inventors:
MINOTANI TADASHI
SHIBATA NOBUTAROU
SHINAGAWA MITSURU
SHIBATA NOBUTAROU
SHINAGAWA MITSURU
Application Number:
PCT/JP2004/017883
Publication Date:
June 30, 2005
Filing Date:
December 01, 2004
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
MINOTANI TADASHI
SHIBATA NOBUTAROU
SHINAGAWA MITSURU
MINOTANI TADASHI
SHIBATA NOBUTAROU
SHINAGAWA MITSURU
International Classes:
H03K4/00; H04B13/00; (IPC1-7): H04B13/00; H03K4/00
Foreign References:
| JP2003188835A | 2003-07-04 | |||
| US3305733A | 1967-02-21 | |||
| JP2004153708A | 2004-05-27 |
Other References:
See also references of EP 1587226A4
Attorney, Agent or Firm:
Miyoshi, Hidekazu (2-8 Toranomon 1-chom, Minato-ku Tokyo, JP)
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