Ringer circuit for telephone

Details Ringer circuit for telephone Ringer circuit for telephone

1980-03-10

1982-04-27

Konick, Bernard

H04M 100

Patent

active

043272541

ABSTRACT:
A ringer circuit for a telephone is disclosed which is equipped with a transformer, having its primary winding connected to the telephone line through hook-switches. The secondary winding of the transformer is connected to a rectifying circuit so that it may convert the high voltage and low current of the ringer signal received into a secondary ringer signal having high current and low voltage. This secondary ringer signal is rectified and fed to an oscillator which drives a sound generator to provide a call signal.

REFERENCES:
patent: 3254161 (1966-05-01), Svala
patent: 3291916 (1966-12-01), Jorgensen
patent: 3466403 (1969-09-01), Combridge et al.
patent: 3731004 (1973-05-01), Cowpland et al.
The Radio Amateur's Handbook, 1972, "Rectifier Circuits", pp. 106-107.

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