Ringing generator

Details Ringing generator Ringing generator

H - Electricity

04

M

379/62

H04M 19/04 (2006.01) H04M 19/02 (2006.01)

Patent

CA 1114536

ABSTRACT OF THE DISCLOSURE A ringing signal supply for supplying ringing current to a telephone line with high efficiency and minimum distortion. As the ringing current demand of a load increases, distortion of the output signal is produced which causes an error signal to be generated after comparison of the output signal waveshape with a reference waveshape. The error signal is used to change the duty cycle of a pulse signal from which the output ringing signal is produced, thereby maintaining the proper output signal waveshape.

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