Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-03-18
1994-05-24
Hudspeth, David R.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307354, 307475, 375 76, H03K 14003
Patent
active
053151755
ABSTRACT:
A digital data bus provides common-mode noise immunity equal to approximately one-half that of a fully differentially driven and received bus. For a data bus having n data lines, n+1 lines are provided, the n+1th line being a reference voltage line. The data and reference lines are driven by drivers having similar impedance characteristics. The reference line is received by a line receiver having impedance characteristics similar to the differential receivers of the data lines. The data line receivers have one differential input connected to respective data lines and the other differential input connected to the output of the reference line receiver. The reference line is routed with the data lines to ensure induced signals are common-mode, but spaced therefrom to reduce cross-talk.
REFERENCES:
patent: 4859877 (1989-08-01), Cooperman et al.
patent: 4994690 (1991-02-01), Sundstrom et al.
patent: 5003467 (1991-03-01), Donaldson et al.
patent: 5019228 (1991-05-01), Sanwo et al.
patent: 5056110 (1991-10-01), Fu et al.
patent: 5220211 (1993-06-01), Christopher et al.
"MECL System Design Handbook", 4th Ed., William R. Blood, Jr., Motorola Semiconductor Products, Inc., 1988, pp. 70-76.
Hudspeth David R.
Northern Telecom Limited
Smith Dallas F.
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