Title:
電気的医療装置及び電子内視鏡装置
Document Type and Number:
Japanese Patent JP3586138
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent noises from being entrained in electric signals transmitted from a patient circuit to a secondary circuit, while keeping the patient circuit and the secondary circuit insulated from each other. SOLUTION: A video processor 3 comprises: a video signal processing circuit 31 for processing signals outputted from a CCD and for outputting an analog brightness signal Y and an analog color signal C; photocouplers 34, 35 serving as signal insulating transmission means for transmitting the analog brightness signal Y and the analog color signal C from a patient circuit 32 to a secondary circuit 33 in an insulating manner; a reference potential transmission photocoupler 36 serving as a reference potential insulation transmission means by which noises generated in the patient circuit 32 are transmitted to the secondary circuit 33 in an insulated fashion; and differential circuits 37, 38 to which the analog brightness signal Y and the analog color signal C transmitted to the secondary circuit 33 and the noises of the patient circuit 32 transmitted to the secondary circuit 33 are inputted as reference potential.
Inventors:
Kouichi Niida
Application Number:
JP16592399A
Publication Date:
November 10, 2004
Filing Date:
June 11, 1999
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
H04N5/225; A61B1/04; H04N7/18; H04N9/04; (IPC1-7): A61B1/04
Domestic Patent References:
| JP6055923A | ||||
| JP63318927A | ||||
| JP6472724A | ||||
| JP4183432A | ||||
| JP924022A | ||||
| JP9154813A | ||||
| JP2000115591A |
Attorney, Agent or Firm:
Susumu Ito