Pulse or digital communications – Repeaters – Testing
Patent
1984-10-01
1986-09-30
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
370 85, 328 57, H04B 300, H03K 1756
Patent
active
046150390
ABSTRACT:
An improved driver for differentially driving a differentially conducting cable (e.g., for Ethernet) minimizes the output offset signal coupled to the cable when the driver is idle. When driven to an idle state, the driver provides a shaped output which transitions to a quiescent output level in a manner which eliminates output signal common mode step change and consequently reduces signal distortion on the cable due to reflection of the step change.
REFERENCES:
patent: 4075606 (1978-02-01), Wilkens
patent: 4320520 (1982-03-01), Graham
patent: 4337465 (1982-06-01), Spracklen et al.
patent: 4376278 (1983-03-01), Jacobsthal
patent: 4411004 (1983-10-01), Graham
Millman & Halkias, Integrated Electronics: Analog and Digital Circuits and Systems, McGraw-Hill, 1972, pp. 580-581.
Intel Corporation, 1982, Publication No. 82501, "Ethernet Serial Interface".
Advanced Micro Devices, 1983, Publication No. Am7991A, "Serial Interface Adapter (SIA)".
Balakrishnan Ramanatha V.
Carinalli Charles P.
Li Gabriel M. Y.
Glenny Raymond C.
National Semiconductor Corporation
Safourek Benedict V.
Winters Paul J.
Woodward Gail W.
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