Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1981-05-29
1983-12-13
Orsino, Jr., Joseph A.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
250551, 455602, H04B 900
Patent
active
044208413
ABSTRACT:
A transceiver provides bidirectional optically isolated communication between two devices. A first output signal from the first device is input to the transceiver. Using parallel optical data links, an optical signal is generated in response to the first signal and is detected by a pair of light sensitive devices. These light sensitive devices cause a second signal, representative of the first signal, to be generated. The second signal is then conducted to the input terminal of the second device. In an alternate mode of operation, the transceiver receives a third signal from the second device. Using series optical data links, optical signals are generated in response to the third signal and are detected by light sensitive devices. These light sensitive devices cause a fourth signal, representative of the third signal, to be generated. The fourth signal is then conducted to the input terminal of the first device. A control circuit cooperates with the parallel and series optical links to enable one and inhibit the other dependent upon whether a signal is to be communicated to the second device from the first device, or to the first device from the second device.
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Ueno et al.-An Optical Fiber Cable Communication System Using Pulse-Interval Modulation-1st Euro. Conf. on Optical Fibre Comm., Sep. 16-18, 1975, pp. 156-158.
Judd et al.-Bidirectional Optical Isolator-IBM Tech. Disclosure Bulletin, vol. 22, #4, Sep. 1979, pp. 1671-1672.
Lackey D. R.
Orsino Jr. Joseph A.
Westinghouse Electric Corp.
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