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4533948 CATV communication system
VI
New Patents
A purely telephonic commumcation can be established between two videophone terminals during a videocommumcat~on between one of the two termmals and the p~cture bank. Once the vldeocommumcation has been established between the vtdeophone terminal and the ptcture bank vm network voice switching umts, the local telephone hne assigned to the wdeophone terminal ~s automatically released whde only a local wide-band hne assigned to the wdeophone terminal ~s occupied for exchanging v~sion stgnals and also data signals w~th the picture bank wa w~de-band switching umts
4533948 CATV
COMMUNICATION SYSTEM
Robert P McNamara, Gregory Ennls, Richard J Felertag, Robert Bauer assigned to GenSral Instrument Corporation
4533988 ON-CHIP
CMOS CIRCUIT
BRIDGE
Christopher N Daly, David K Money, Bilgola Plateau, Australia assigned to Telectronlcs Pty Ltd
There is disclosed a bridge o r c m t which finds particularly advantageous use m medical prostheses which can be programmed externally and which can transmit telemetry stgnals The entire ctrcmt is implemented on a single CMOS integrated circuit. Dependmg upon the values of two control bits, the bridge circuit funcUons to derive a powenng potential from an externally transmitted signal, with or without regulation. Externally transmitted programming s~gnals are detectable, and telemetry s~gnals can be transmitted from the chip as well. There is no active switching of bridge devices during power rectification mode, and instead they are biased on continuously This allows the rectifier to operate at carrier frequenctes as high as several megahertz All of this Is achieved by using conventlonal CMOS processing techmques, without reqmring any extra diffusion steps
4534027 A two way d~g~tal commumcat~on arrangement uuhzes a CATV system to provide bldwectlonal data transport service between any two points within the CATV system The headend recewes an upstream message and selectively rebroadcasts such message on the downstream port~on of the spectrum. System intelligence is thus distributed throughout the system as server and subscriber nodes can be located anywhere m the CATV network In order to obtain access to the CATV commumcatlon resources, user eqmpment at each node must attach a frame verifier (FV) code to each respective message The headend examines the FV and permits rebroadcast of messages only zf the FV code indicates that the user ts authorized
DUPLEX DIGITAL SPAN CONVERSION CIRCUIT ARRANGEMENT Thomas Perry assigned to G T E Automatic Electric Incorporated
New Patents
A purely telephonic commumcation can be established between two videophone terminals during a videocommumcat~on between one of the two termmals and the p~cture bank. Once the vldeocommumcation has been established between the vtdeophone terminal and the ptcture bank vm network voice switching umts, the local telephone hne assigned to the wdeophone terminal ~s automatically released whde only a local wide-band hne assigned to the wdeophone terminal ~s occupied for exchanging v~sion stgnals and also data signals w~th the picture bank wa w~de-band switching umts
4533948 CATV
COMMUNICATION SYSTEM
Robert P McNamara, Gregory Ennls, Richard J Felertag, Robert Bauer assigned to GenSral Instrument Corporation
4533988 ON-CHIP
CMOS CIRCUIT
BRIDGE
Christopher N Daly, David K Money, Bilgola Plateau, Australia assigned to Telectronlcs Pty Ltd
There is disclosed a bridge o r c m t which finds particularly advantageous use m medical prostheses which can be programmed externally and which can transmit telemetry stgnals The entire ctrcmt is implemented on a single CMOS integrated circuit. Dependmg upon the values of two control bits, the bridge circuit funcUons to derive a powenng potential from an externally transmitted signal, with or without regulation. Externally transmitted programming s~gnals are detectable, and telemetry s~gnals can be transmitted from the chip as well. There is no active switching of bridge devices during power rectification mode, and instead they are biased on continuously This allows the rectifier to operate at carrier frequenctes as high as several megahertz All of this Is achieved by using conventlonal CMOS processing techmques, without reqmring any extra diffusion steps
4534027 A two way d~g~tal commumcat~on arrangement uuhzes a CATV system to provide bldwectlonal data transport service between any two points within the CATV system The headend recewes an upstream message and selectively rebroadcasts such message on the downstream port~on of the spectrum. System intelligence is thus distributed throughout the system as server and subscriber nodes can be located anywhere m the CATV network In order to obtain access to the CATV commumcatlon resources, user eqmpment at each node must attach a frame verifier (FV) code to each respective message The headend examines the FV and permits rebroadcast of messages only zf the FV code indicates that the user ts authorized
DUPLEX DIGITAL SPAN CONVERSION CIRCUIT ARRANGEMENT Thomas Perry assigned to G T E Automatic Electric Incorporated