Method and apparatus for reducing noise in a digital voltage sig

Details Method and apparatus for reducing noise in a digital voltage sig Method and apparatus for reducing noise in a digital voltage sig

1992-03-11

1992-11-03

Dwyer, James L.

Telephonic communications

Transmission line conditioning

Interference suppression

375 99, 375104, 328115, 455222, H04B 110

Patent

active

051611856

ABSTRACT:
A method and circuitry for reducing noise is provided. The circuit receives a digital data signal at its input (26). The signal is input to a magnitude evaluator (28) and a pass/squelch circuit (30). Magnitude evaluator (28) samples the digital signal and controls an integrator (36) according to the magnitude of each of the samples. Integrator (36) averages the magnitudes over time. If the signal is a noise signal, integrator (36) toggles a switch (40) to activate pass/squelch circuit (30) to squelch the digital data at its input (29). If the signal is a valid signal, then integrator (36) toggles switch (40) to deactivate pass/squelch circuit (30) to allow the digital data to pass therethrough to destination device (44).

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