Electronic endoscope apparatus capable of protecting overvoltage

Details Electronic endoscope apparatus capable of protecting overvoltage Electronic endoscope apparatus capable of protecting overvoltage

1991-10-09

1993-07-06

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 56, 361 91, 361111, 128901, 358 98, H02H 322

Patent

active

052259587

ABSTRACT:
In an electronic endoscope apparatus, an overvoltage is produced by discharging electrostatic energy induced on an electronic scope made of a synthetic resin. The electronic scope used for the electronic endoscope apparatus comprises: a solid-state image sensor for producing an image signal of a biological body under medical examination, the image signal being derived from a signal line of the image sensor; and, an overvoltage protecting circuit for protecting the image sensor against an overvoltage caused by at least one of electrostatic energy induced on the electronic scope and interruption of source power supplied from the electronic endoscope apparatus to the image sensor, by maintaining at least said signal line at the same potential.

REFERENCES:
patent: 4587588 (1986-05-01), Goldstein
patent: 5146384 (1992-09-01), Markovic et al.
patent: 5159518 (1992-10-01), Roy

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