Digital memory system

Details Digital memory system Digital memory system

1978-03-30

1981-05-12

Safourek, Benedict V.

Telecommunications

Carrier wave repeater or relay system

With delay or recording

455 1, 375 3, H04B 1500

Patent

active

042675960

ABSTRACT:
A digital memory system adapted to store a sequence of one bit quantized samples of an input signal having a frequency within a predetermined band of frequencies and to produce a replica of such input signal from such stored one bit samples. A control signal is produced indicative of the particular portion of the band of frequencies which includes the frequency of the input signal. A plurality of filters is provided, each one tuned to a different portion of the band. In response to the control signal the sequence of bits read from memory passes through the filter which is tuned to the portion of the band which includes the frequency of the input signal. With such arrangement many unwanted harmonics produced because of the one bit quantization of the input signal are removed.

REFERENCES:
patent: 3145380 (1964-08-01), Currie
patent: 3187258 (1965-06-01), Zolnik
patent: 3524201 (1970-08-01), Land, Jr.
patent: 3600685 (1971-08-01), Doyle
patent: 3947827 (1976-03-01), Dautremont, Jr. et al.
patent: 3991409 (1976-11-01), Dautremont, Jr. et al.

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