41
Edmund N Sepe: Coaxial cable. American Telephone and Telegraph Company, AT&T Information Systems, David H Tannenbaum, David R Padnes, April 18, 1989: US04822956 (20 worldwide citation)

Electro-static discharge is a problem with high-speed data even when using coaxial cables. Primarily, this problem arises at the terminal ends of the circuit where connections are made using separate coaxial cables for connecting to various pieces of equipment thereby allowing voltages to be induced ...


42
Gary J Grimes, Christopher Lanzafame, Bryan S Moffitt: Clock control circuit for phase control. American Telephone and Telegraph Co, AT&T Information Systems, David H Tannenbaum, June 9, 1987: US04672299 (20 worldwide citation)

There is disclosed a clock circuit for a PBX system that uses phase locked loop technology to perform synchronization between two input signals. The system can switch between different reference sources without introducing error and without requiring the entire circuit to become realigned with the p ...


43
Kevin J Oye, Enzo Paterno, Thomas L Smith: Multi-channel memory access circuit. American Telephone & Telegraph Company, AT&T Information Systems, David H Tannenbaum, February 14, 1989: US04805094 (19 worldwide citation)

In many situations, contiguous data is not stored at contiguous locations within a memory. This fact alone causes an increase in processor time for retrieval purposes or the intervention of a memory management unit of some type. The situation is compounded when large amounts of data must be obtained ...


44
Bryan D Ackland, Neil H E Weste: Random access memory system having high-speed serial data paths. Bell Telephone Laboratories Incorporated, Ronald D Slusky, David H Tannenbaum, October 25, 1983: US04412313 (19 worldwide citation)

To substantially increase the bandwidth of a random access memory (RAM), a shift register is disposed within the memory array such that the shift register lies parallel to the word lines and is connected to at least individual ones of the bit lines contained within the array. Separate high-speed ser ...


45
Ernest Gerard DeNigris, Ralph John Palette: Printed wiring board handle having viewable option connectors. Bell Telephone Laboratories Incorporated, David H Tannenbaum, September 13, 1977: US04047781 (19 worldwide citation)

A handle is disclosed for use in conjunction with a key telephone printed wiring board. The handle is constructed having windows along the front surface and electrical contacts grouped behind each window. A multicontact connector is optionally connected to various of the contacts within each group a ...


46
Robert William Gimby: Video port interface supporting multiple data formats. Cirrus Logic, David H Tannenbaum, Steven A Shaw, December 15, 1998: US05850266 (18 worldwide citation)

A video port interface that determines the amount and type of incoming data by reading information from certain memories. A first memory indicates a first format of the incoming data. A second memory indicates a second format of the incoming data. Finally, a third memory indicates a number of lines ...


47
Alexander Feiner, Chao Kai Liu, Sigurd G Waaben: Signal corrected optocoupled device. Bell Telephone Laboratories Incorporated, David H Tannenbaum, February 26, 1980: US04190747 (18 worldwide citation)

A remote gain controlled optocoupled device is disclosed utilizing a DC reference voltage in the output section to compensate for variations in the optocoupling characteristics of the circuit. The DC voltage level output of the photodetector, which is a function of the light transfer characteristics ...


48
Dennis B James, Bryan S Moffitt, Douglas C Smith: Distributed time division multiplexing bus. AT&T Bell Laboratories, David H Tannenbaum, October 2, 1984: US04475191 (18 worldwide citation)

High density time division busses suffer from many problems, one of which is that impedance discontinuities cause signal reflections to occur along the bus. These reflections, in turn, affect the settling time and noise margins of the bus and thus reduce the time "window" in which valid signals may ...


49
Leslie A Baxter, Paul R Berkowitz: Variable time slot communication system. AT&T Information Systems American Telephone and Telegraph Company, David R Padnes, David H Tannenbaum, February 28, 1989: US04809270 (17 worldwide citation)

A time division communication system having peripheral devices controlled om a port circuit is arranged such that the port circuit may have assigned to it a variable number of time slots for any peripheral device associated therewith. Each port circuit has a microprocessor control device which is ca ...


50
Edmund T Burke, Joseph F Catalano, James A Henderson Jr, Nicholas K Smith: ACD Combined handset and headset arrangement. Bell Telephone Laboratories Incorporated, David H Tannenbaum, May 15, 1984: US04449017 (17 worldwide citation)

When a standard business office communication system is combined with ACD features, it is necessary to design the system to accommodate a variety of operational modes. Two such modes are handset operation, where a station user talks and listens via a conventional hand-held instrument, and headset op ...