Integrate-and-dump receiver for fiber optic transmission
First Claim
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1. An optical receiver, comprising:
- only a single photodiode for converting incoming optical signals to electrical signals;
a plurality of first electronic amplifiers electronically connected to a first terminal of said photodiode, with said amplifiers biased at a preselected first potential;
a plurality of second electronic amplifiers electronically connected to a second terminal of said photodiode with said second amplifiers biased at a preselected second potential; and
a plurality of pairs of output terminals, each of said pairs of output terminals being an output terminal of one of said first amplifiers and one of said second amplifiers, each said pair of output terminals having a signal voltage responsive to one of a plurality of optical input signals.
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Abstract
A highly sensitive optical receiver where one terminal of the photodiode of the receiver is connected to a negatively biased amplifier while the other terminal of photodetector is connected to a positively biased amplifier, where such connections automatically bias the photodiode and use the current from both terminals (anode and cathode) of the photodiode. This invention also provides an optical receiver which has a DC cancellation circuit to eliminate the biasing voltages in the final output signal.
31 Citations
4 Claims
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1. An optical receiver, comprising:
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only a single photodiode for converting incoming optical signals to electrical signals; a plurality of first electronic amplifiers electronically connected to a first terminal of said photodiode, with said amplifiers biased at a preselected first potential; a plurality of second electronic amplifiers electronically connected to a second terminal of said photodiode with said second amplifiers biased at a preselected second potential; and a plurality of pairs of output terminals, each of said pairs of output terminals being an output terminal of one of said first amplifiers and one of said second amplifiers, each said pair of output terminals having a signal voltage responsive to one of a plurality of optical input signals. - View Dependent Claims (2, 3)
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4. An optical receiver comprising:
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a means for converting an incoming optical signal to an electrical signal; an electronic first amplifier electronically connected to a first terminal of said converting means for amplification of said electronic signal, with said first amplifier constructed with a P-type common source input stage such that the input terminal of said first amplifier is biased at a preselected first potential; and an electronic second amplifier electronically connected to a second terminal of said converting means for amplification of said electronic signal, with said second amplifier constructed with an N-type common source input stage such that the input terminal of said second amplifier is biased at a preselected second potential where said converting means is biased as a result of being electronically connected directly to said first and second amplifier, with the output of said receiver being a signal voltage responsive to said optical signal.
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Specification