Digital memory system

Details Digital memory system Digital memory system

1979-09-19

1981-07-21

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 76, 455 18, 365 80, 365129, H04B 715

Patent

active

042802199

ABSTRACT:
A digital memory system adapted to store samples of a received radio frequency signal and enable retransmission of a radio frequency signal from such stored samples, such retransmitted radio frequency signal having a frequency related to the frequency of the received radio frequency signal. The received signal is heterodyned to a periodic sinusoid video frequency signal having a predetermined average level. A sequence of one-bit logical signals representative of the amplitude of the video signal relative to a predetermined level other than the predetermined average level is stored. The stored samples are returned and converted to a radio frequency signal having a frequency of the received signal. By using a non-average level as the threshold voltage, the spectrum of the signal retrieved from the memory will have reduced harmonic components relative to the fundamental frequency component.

REFERENCES:
patent: 2477585 (1949-08-01), Dodington
patent: 3368038 (1968-02-01), Ringlehaan
patent: 3502906 (1970-03-01), Aulhorn et al.
patent: 3777268 (1973-12-01), Cleobury et al.
patent: 4015144 (1977-03-01), Brouckaert

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