Title:
SWITCH CIRCUIT, METHOD FOR CONTROLLING THE SAME, AND ULTRASONIC DIAGNOSTIC EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2006/059600
Kind Code:
A1
Abstract:
A spike voltage occurring during on/off switching in a switch setting period can be reduced in a switch circuit where an analog switch is connected to each of intersections of signal lines arranged in vertical and horizontal directions and where a multiple of switches are periodically turned on and off, in accordance with a predetermined schedule, to distribute analog signals between a multiple of input terminals and a multiple of output terminals. Switches, which are adjacent to each other in the order of performing on/off switching, of the multiple of switches are divided into a plurality of separate groups, and the timing of on/off switching is shifted among the groups. This can eliminates the concurrence of spikes during switching, thereby preventing the occurrence of large noise.
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Inventors:
HARA KENJI (JP)
SAKANO JUNICHI (JP)
TAMANO SATOSHI (JP)
SAKANO JUNICHI (JP)
TAMANO SATOSHI (JP)
Application Number:
PCT/JP2005/021887
Publication Date:
June 08, 2006
Filing Date:
November 29, 2005
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
HARA KENJI (JP)
SAKANO JUNICHI (JP)
TAMANO SATOSHI (JP)
HARA KENJI (JP)
SAKANO JUNICHI (JP)
TAMANO SATOSHI (JP)
International Classes:
A61B8/00
Foreign References:
JP2004329626A | 2004-11-25 | |||
JP2004290509A | 2004-10-21 | |||
JP2004363997A | 2004-12-24 | |||
JPS6426148A | 1989-01-27 |
Attorney, Agent or Firm:
NITTO INTERNATIONAL PATENT OFFICE P.P.C. (3-3 Shinkawa 1-chom, Chuo-ku Tokyo 33, JP)
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