Patent ID: 6034802
Filing Date: 2000-03-07
Classification: H04B

Abstract:
A communication system comprising:a photo detector having a photo detector input for receiving communication signals from a transmitting source, and having a photo detector output for providing electrical output signals;a first delay line having a first delay input and a first delay output, said first delay input being coupled to said detector output, said first delay line for delaying said electrical output signals by a predetermined delay period;a voltage divider having a divider input and a divider output, said divider input being coupled to said photo detector output, said voltage divider for dividing said electrical output signals by a fixed ratio;a first voltage comparator having a first comparator first input, a first comparator second input and a first comparator output, said first comparator first input being coupled to said first delay output, said first comparator second input being coupled to said divider output;a second delay having a second delay input and a second delay output, said second delay input being coupled to said divider output, said second delay line for delaying said divider output by said predetermined delay period; anda second comparator having a second comparator first input, a second comparator second input and a second comparator output, said second comparator first input being coupled to said photo detector output, said second comparator second input being coupled to said second delay output.