Patent ID: 6031583
Filing Date: 2000-02-29
Classification: H04N

Abstract:
A high frequency video isolation circuit comprising:a modulating signal source for producing a modulating signal having a frequency of several hundred megahertz;an input multiplier for multiplying said modulating signal with an input video signal having frequency components in a frequency range from about several hertz to about one hundred or more megahertz, to produce a modulated video signal having frequency components in a frequency range from about one hundred megahertz to about several hundred megahertz;a first isolation transformer having an input and an output, for transforming said modulated video signal from said input to said output;an output multiplier for multiplying said transformed modulated video signal with said modulating signal to produce an isolated output video signal having said frequency components of said input video signal; andincluding a second isolation transformer for transforming said modulating signal so as to apply said modulating signal to said output multiplier.