Electronic tone ringer control circuit for telephone set

Details Electronic tone ringer control circuit for telephone set Electronic tone ringer control circuit for telephone set

H - Electricity

04

M

379/18

H04M 3/02 (2006.01)

Patent

CA 1072694

ELECTRONIC TONE RINGER CONTROL CIRCUIT FOR TELEPHONE SET Abstract of the Disclosure A circuit for controlling the on-off ringing of a line powered electronic tone ringer in a telephone set. The circuit, which includes a variable rate charge-discharge suppression circuit, effectively prevents up to 300 volt peak, 12 Hz transient spikes on the line from actuating the tone ringer, yet still responds to a 35 volt RMS, 18 Hz ringing signal. - i -

288023

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