A video camera isolation circuit for use with video cameras that are coupled to endoscopes utilizes simple pulse transformer technology to isolate the video camera head from the video processing circuitry allowing the processing circuitry to be referenced to ground. The video signal from the CCD...http://www.google.co.uk/patents/US5716323?utm_source=gb-gplus-sharePatent US5716323 - Electrical isolation of endoscopic video camera
