Digital signal level comparison device

Details Digital signal level comparison device Digital signal level comparison device

1975-08-25

1977-10-11

Morrison, Malcolm A.

Communications: electrical

Digital comparator systems

179 1HF, 333 81R, 340347DD, G06F 702, H01P 122

Patent

active

040538702

ABSTRACT:
A digital level comparison device having a digitally controlled switching network for adding or removing attenuation from a signal channel is described. The device includes a binary counter having an input for pulses corresponding to the received signal level and a timing input for receiving clock pulses corresponding to a predetermined nominal level. The counter is graduated in stages, each of which has an output leading to the aforementioned switching network. Within each stage interval, on one side thereof, there is a first additional interval, and on the other side of that stage interval there is a second additional interval. If the counter reading falls within a first additional interval the predetermined nominal level value is reduced by a given value, and if the counter reading falls within a second additional interval the nominal level value is increased by a given value.

REFERENCES:
patent: 3146313 (1964-08-01), Ulin
patent: 3308286 (1967-03-01), Norman et al.
patent: 3346844 (1967-10-01), Scott et al.
patent: 3510682 (1970-05-01), Nichols
patent: 3577084 (1971-05-01), Atcherson et al.
patent: 3632996 (1972-01-01), Paine
patent: 3735264 (1973-05-01), Mauduech

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