Transceiver for full duplex signalling on a fiber optic cable
First Claim
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1. For use in an optical signal transmission system having a local transceiver and a remote transceiver for full duplex signalling between the two transceivers, a transceiver comprising:
- means for transmitting in response to an input signal an optical signal corresponding to the input signal over a fiber optic cable to a remote transceiver;
means for receiving simultaneously an optical signal which corresponds to said input signal and an optical signal from a remote transceiver for providing a first output signal having a first component which corresponds to said input signal and a second component which corresponds to the optical signal received from the remote transceiver; and
means for providing in response to said input signal and said first output signal having said first and said second components a second output signal comprising said second component with said first component remoted therefrom, said means for providing said second output signal comprising means for generating a signal which is equal in magnitude and opposite in phase to the magnitude and phase of said first component in said first output signal.
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Abstract
A full duplex optical signal transmission system comprising a pair of transceivers interconnected by means of a single fiber optic cable is provided with an optical receiver for detecting transmitted and received optical signals and a delay and compensation circuit used in conjunction with a differential amplifier coupled to the optical signal receiver for separating the transmitted optical signal from the received optical signal for providing an output from the transceiver comprising a signal corresponding to the received optical signal.
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Citations
14 Claims
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1. For use in an optical signal transmission system having a local transceiver and a remote transceiver for full duplex signalling between the two transceivers, a transceiver comprising:
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means for transmitting in response to an input signal an optical signal corresponding to the input signal over a fiber optic cable to a remote transceiver; means for receiving simultaneously an optical signal which corresponds to said input signal and an optical signal from a remote transceiver for providing a first output signal having a first component which corresponds to said input signal and a second component which corresponds to the optical signal received from the remote transceiver; and means for providing in response to said input signal and said first output signal having said first and said second components a second output signal comprising said second component with said first component remoted therefrom, said means for providing said second output signal comprising means for generating a signal which is equal in magnitude and opposite in phase to the magnitude and phase of said first component in said first output signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of full duplex signalling in an optical signal transmission system having a local transceiver and a remote transceiver comprising the steps of:
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transmitting in response to an input signal an optical signal corresponding to the input signal over a fiber optic cable to a remote transceiver; receiving simultaneously an optical signal which corresponds to said input signal and an optical signal from a remote transceiver for providing a first output signal having a first component which corresponds to said input signal and a second component which corresponds to the optical signal received from the remote transceiver; and providing in response to said input signal and said first output signal having said first and said second components a second output signal comprising said second component with said first component removed therefrom, said step of providing said second output signal comprises the step of generating a signal which is equal in magnitude and opposite in phase to the magnitude and phase of said first component in said first output signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. For use in an optical signal transmission system having a local transceiver and a remote transceiver for full duplex signalling between the two transceivers, a transceiver comprising:
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means for transmitting in response to an input signal an optical signal corresponding to the input signal over a fiber optic cable to a remote transceiver; means for receiving simultaneously an optical signal which corresponds to said input signal and an optical signal from a remote transceiver for providing a first output signal having a first component which corresponds to said input signal and a second component which corresponds to the optical signal received from the remote transceiver; and means for providing in response to said input signal and said first output signal having said first and said second components a second output signal comprising said second component with said first component remoted therefrom, said means for providing said second output signal comprising; means responsive to said input signal for generating a compensating signal which is equal in magnitude and opposite in phase to the magnitude and phase of said first component in said first output signal; and a differential amplifying means responsive to said first output signal and said compensating signal for providing said second output signal.
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14. A method of full duplex signalling in an optical signal transmission system having a local transceiver and a remote transceiver comprising the steps of:
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transmitting in response to an input signal an optical signal corresponding to the input signal over a fiber optic cable to a remote transceiver; receiving simultaneously an optical signal which corresponds to said input signal and an optical signal from a remote transceiver for providing a first output signal having a first component which corresponds to said input signal and a second component which corresponds to the optical signal received from the remote transceiver; and providing in response to said input signal and said first output signal having said first and said second components a second output signal comprising said second component with said first component removed therefrom, said step of providing said second output signal comprising the steps of; generating in response to said input signal a compensating signal which is equal in magnitude and opposite in phase to the magnitude and phase of said first component in said first output signal; and amplifying in a differential amplifying means said first output signal and said compensating signal for providing said second output signal.
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Specification