A DTMF SIGNAL GENERATOR

The device provides an enhanced signal synthesis method for the DTMF signal generator which is appropriate for the coherent communication and the fast frequency hopping(FFH) system. The device contains a phase accumulator(1) for adding all digital input to provide it to a sine table(3); and the sine table(3) for generating sine and digital data; an adder(21) for generating the upper output bit of the adder to reduce the number of input bit of the sine table(3); and a delay element(22) for accepting the rest of lower output bit of the adder(21).