Telephone ringing signal generator

Details Telephone ringing signal generator Telephone ringing signal generator

1982-01-11

1984-03-13

Schreyer, Stafford D.

179 84R, 179 18HB, H04M 512

Patent

active

044369603

ABSTRACT:
An AC-AC line current reversal technique is employed for generating a telephone ringing signal. Generation of the signal is accomplished by controllably activating one of two series full wave rectification circuits responsive to a transformer coupled AC signal during alternate periods at a rate substantially equal to a desired ringing signal frequency.

REFERENCES:
patent: 4174467 (1979-11-01), Ferrieu

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