Method and apparatus for the transmission of binary data...

Details Method and apparatus for the transmission of binary data... Method and apparatus for the transmission of binary data...

H - Electricity

04

B

332/60, 325/64

H04B 1/04 (2006.01) H04L 27/12 (2006.01)

Patent

CA 1261398

Abstract of the Disclosure A method for transmitting binary data signals by frequency shift keying (FSK), in which a binary data signal 1 is repre- sented by a first frequency (f1) and a binary data signal 0 is represented by a second frequency (f2) includes addressing a first addressing input of a programmable memory with the binary data signals, in which half the periods of the two frequencies (f1, f2) are marked in two memory regions (I, II) of the programmable memory addressed by the first addressing input; controlling other address inputs with a free-running counter; and generating a pulse resetting the counter and controlling a 1:2 frequency divider having an output delivering one of the frequencies (f1, f2), when addressing a storage cell in which one of the halfperiods is marked and a modulator for carrying out the method.

513570

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