Integrated waveshaping circuit using weighted current summing

Details Integrated waveshaping circuit using weighted current summing Integrated waveshaping circuit using weighted current summing

1992-12-22

1994-10-18

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307498, 307529, 328104, H03K 501

Patent

active

053571452

ABSTRACT:
A waveshaping circuit, which includes a phase-lock-loop stage, an input logic stage, a delayed input logic stage, and a weighted current sum stage, shapes and filters a data signal to be transmitted onto the twisted-pair media of a local area network. The phase-lock-loop stage generates a series of incrementally-delayed timing signals in response to an oscillator signal. The input logic stage generates a plurality of pairs of logic signals by periodically latching a logic state and an inverse logic state of the data signal in response to the incrementally-delayed timing signals. The delayed input logic stage generates a plurality of pairs of delayed logic signals by periodically latching a logic state and an inverse logic state of an inverse data signal in response to the incrementally-delayed timing signals. The weighted current sum stage incrementally generates both an output data signal and a complementary output data signal in response to both the plurality of logic signals and the plurality of delayed logic signals.

REFERENCES:
patent: 3390283 (1968-06-01), Hannigsberg
patent: 3504290 (1970-03-01), Earle
patent: 3612916 (1971-10-01), O'Neill
patent: 3659207 (1972-04-01), Perreault
patent: 3889198 (1975-06-01), Lighthall et al.
patent: 4675546 (1987-06-01), Shaw

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