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US4325085A
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Method and apparatus for adaptive facsimile compression using a two dimensional maximum likelihood predictor
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US4305047A
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Feedback circuit for controlling the peak optical output power of an injection laser
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US4305150A
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On-line channel quality monitor for a communication channel
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US4250458A
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Baseband DC offset detector and control circuit for DC coupled digital demodulator
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US4206420A
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Phase locked loop with automatic sweep
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GB1581521A
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Tdma multiplexer-demultiplexer with multiple ports
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GB1600755A
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Communications processor
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US4174505A
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Directional PSK modulation and demodulation system
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US4068104A
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Interface for in band SCPC supervisory and signalling system
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CA1072189A
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Side locked loop with circuit for preventing sidelock
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US4063038A
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Error coding communication terminal interface
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US4000476A
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Phase locked loop with circuit for preventing sidelock
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US4054753A
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Double sync burst TDMA system
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US4061979A
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Phase locked loop with pre-set and squelch
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US4002845A
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Frame synchronizer
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US3940558A
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Remote master/slave station clock
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US3922496A
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TDMA satellite communications system with guard band obviating ongoing propagation delay calculation
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