METHOD FOR GENERATING DTMF SIGNALS AND DTMF SIGNAL GENERATOR Russian patent published in 2004 - IPC

FIELD: generating dual-tone multifrequency signals by digital methods for data transfer, for instance in telephony. SUBSTANCE: proposed DTMF signal generator implementing DTMF signal generation method has two accumulating adders, two clamping registers, two memory devices, total mechanism, analog-to-digital converter, DTMF signal-to-integer number sequence code converter, adjustable-ratio master frequency divider of DTMF signal generator, and DTMF signal code-to-division ratio code converter. EFFECT: reduced quantity of redundant circuit components; enhanced economic efficiency. 5 cl, 2 dwg