Method and apparatus for improving ringback tolerance in an inpu

Details Method and apparatus for improving ringback tolerance in an inpu Method and apparatus for improving ringback tolerance in an inpu

1999-04-09

2000-09-26

Nuton, My-Trang

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Signal transmission integrity or spurious noise override

327206, H03K 1716, H03K 1730

Patent

active

061247480

ABSTRACT:
An embodiment of a ringback tolerant input buffer in a receiving device is disclosed. The input buffer includes circuitry to provide positive feedback to an input signal once the input signal has crossed a reference voltage threshold. The positive feedback prevents the input signal from recrossing the reference voltage threshold until the receiving device has sampled the input signal. The positive feedback is applied only until the input signal is sampled into the receiving device.

REFERENCES:
patent: 4818901 (1989-04-01), Young et al.
patent: 5698994 (1997-12-01), Tsuji
patent: 5886556 (1999-03-01), Ganger et al.
patent: 6037827 (2000-03-01), Fisch

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