Electronic endoscopic apparatus isolated by differential type dr

Details Electronic endoscopic apparatus isolated by differential type dr Electronic endoscopic apparatus isolated by differential type dr

1988-08-22

1989-09-19

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, 128 4, 12830315, H04N 718, A61B 1739

Patent

active

048686476

ABSTRACT:
An endoscope is provided with an isolation circuit which electrically isolates the ground of the input side and of the output side from each other. The isolation circuit is provided in a signal processing circuit which processes the electrical signal obtained by conversion of the optical image obtained by an objective optical system provided at the end of a long thin insertion portion to be inserted into a body cavity in a solid-state image pickup device. A differential drive device drives the isolation circuit by the differential output thereof, whereby any noise is suppressed and isolation is sufficiently performed.

REFERENCES:
patent: 4074306 (1978-02-01), Kakinuma et al.
patent: 4160997 (1979-07-01), Schwartz
patent: 4607621 (1986-08-01), Wheeler
patent: 4618885 (1986-10-01), Nagasaki et al.
patent: 4706118 (1987-11-01), Kato et al.

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