1984-05-18
1986-06-03
Rubinson, Gene Z.
179 18FA, 179 81R, H04M 308
Patent
active
045931569
ABSTRACT:
A grounded tip detector for use in a subscriber line circuit detects and indicates a tip-to-ground condition in the SLIC. Hysteresis and RC filtering are provided to assure a sharp switch-over of the tip-to-ground detection output and a reduction in the effect of ripple signals due to longitudinal currents.
REFERENCES:
patent: 3772477 (1973-11-01), Richards
patent: 4190745 (1980-02-01), Jusinskas, Jr. et al.
patent: 4301334 (1981-11-01), Lechner
patent: 4326104 (1982-04-01), Bergida
patent: 4385336 (1983-05-01), Takeshita et al.
patent: 4398064 (1983-08-01), Formosa, Jr.
patent: 4429185 (1984-01-01), Adrian et al.
"One Chip Closes in on SLIC Functions"; L. Brown et al., Electronic Design, Sep. 27, 1980, pp. 85-91.
Understanding Telephone Electronics, J. Fike et al., Texas Instruments Inc., through Radio Shack, pp. 6-15.
ITT Corporation
Meagher Thomas F.
O'Halloran John T.
Rubinson Gene Z.
Vaas R.
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