Patent ID: 7139475

Claim:
A redundant fiber optic system comprising: a clock recovery circuit for generating clock signals from redundant data received by at least first and second optical channels; and an analyzing circuit for analyzing said redundant data and for providing an output signal derived from at least one of the redundant data based on the result of said analysis, wherein said analyzing circuit is a comparator which compares said redundant data and said output signal is selected as one of the compared redundant data which has a better predetermined signal characteristic, wherein said redundant data is synchronized redundant data; a photo detector; a first amplifier having an input coupled to an output of said photo detector; a low pass filter having an input coupled to an output of said first amplifier; a second amplifier having an input coupled to an output of said low pass filter; and an analog-to-digital converter having an input coupled to an output of said second amplifier.