Ring signal detector

Details Ring signal detector Ring signal detector

1984-01-15

1986-10-28

Dwyer, James L.

179 616, H04M 165

Patent

active

046200630

ABSTRACT:
A ring detector employs a d.c. blocking capacitor in series reactively with the telephone line, a control element and another terminal of a semiconductor, applying ring voltage and causing conduction, oscillation or latching in the semiconductor. A resistor, transformer, rectifier, a second charging capacitor or all of these may be placed between the capacitor and the semiconductor.

REFERENCES:
patent: 3405234 (1968-10-01), West
patent: 3539728 (1970-11-01), Rubenstein
patent: 3548102 (1970-12-01), Schaum et al.

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