The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2002
Filed:
Apr. 27, 2001
Applicant:
Inventor:
Kenneth J. Burdick, Skaneateles, NY (US);
Assignee:
Welch Allyn, Inc., Skaneateles Falls, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 1/04 ; H04N 7/18 ;
U.S. Cl.
CPC ...
A61B 1/04 ; H04N 7/18 ;
Abstract
A PNP bipolar transistor or an enhancement mode P-channel FET is used as a buffer to drive a video signal from an imager to video processing circuits. An endoscope with a solid state imager having a negative-going video pulse is used, with a video buffer located at or near the distal end to buffer the CCD video signal. The buffer employs a PNP bipolar transistor that is biased by a bias circuit for the base and a power supply for the collector, both located near the transistor, and a load for the emitter located at some distance from the transistor.