Digital encoding circuitry

Details Digital encoding circuitry Digital encoding circuitry

1982-01-13

1984-07-24

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

332 11D, H04B 1204

Patent

active

044621060

ABSTRACT:
In an electrical system of the type in which a digitally-encoded signal is determined at least in part by the difference between a present value of an analog input signal and a reconstructed signal representative of a past value of the input signal and including signal generating means for generating said reconstructed signal, which means is responsive to a reference signal, improved circuitry for generating the reference signal. The improved circuitry comprises a ladder network which increases the magnitude of the reference signal as a function of the length of time the digitally-encoded signal continuously remains in either digital state without a change to the other digital state.

REFERENCES:
patent: 3568062 (1971-03-01), Brolin
patent: 3621396 (1971-11-01), Daugherty
patent: 3735264 (1973-05-01), Mauduech
patent: 3746990 (1973-07-01), Le Diberder et al.
patent: 3757252 (1973-09-01), Deschenes et al.
patent: 3979676 (1976-09-01), Poma
patent: 4190801 (1980-02-01), De Freitas
patent: 4254502 (1981-03-01), De Freitas
patent: 4352191 (1982-09-01), Un

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