Digital frequency sender

Details Digital frequency sender Digital frequency sender

1981-02-19

1983-06-28

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

328 14, 3701102, 375 59, H03K 1318, H04J 312

Patent

active

043909833

ABSTRACT:
A digital frequency sender comprises a generator which supplies multi-frequency codes by cyclically scanning a table under the control of a time base (BT). The sender comprises a logarithmic generator (GL) which delivers single-frequency signals, a logarithmic adder (AL) which sums two single-frequency signals in compressed form, and a frequency output unit (DF) controlled by a computer (CAL). The invention is particularly applicable to time division telecommunication exchange division.

REFERENCES:
patent: 4171466 (1979-10-01), Carbrey
patent: 4172286 (1979-10-01), Wess
Commutation et Electronique No. 59, Oct. 1977, pp. 99-112.
Commutation et Electronique No. 23, Oct. 1968, pp. 43-57.

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