Patent Number: 6,310,954

Title: Ringer circuit

Abstract: A high efficiency ringer circuit having low distortion of the ringer output signal, which is simple in design and inexpensive to manufacture is disclosed. This may be accomplished with a ringer circuit comprising an input signal source, a signal amplifier for receiving and amplifying an input signal from the input signal source, a direct current source for providing power to the signal amplifier, a comparator circuit for receiving an input signal from the signal amplifier, and a switching circuit for receiving an input signal from the comparator circuit for providing an output signal to the direct current source, where, when said input signal to the comparator circuit exceeds a set value, the output signal from the switching circuit de-energizes the direct current source. The amplifier may be a Push-Pull amplifier. The direct current power supply may be a DC/DC SMPS.

Inventors: Vegter; Kor (Eemnes, NL)

Assignee: Lucent Technologies, Inc.

International Classification: H04M 19/04 (20060101); H04M 19/00 (20060101); H04M 001/00 ()

Expiration Date: 10/30/2018