Device for electrical and/or electronic telephone circuits, desi

Details Device for electrical and/or electronic telephone circuits, desi Device for electrical and/or electronic telephone circuits, desi

1994-09-14

1996-05-21

Hofsass, Jeffery

Telephonic communications

Subscriber line or transmission line interface

Protective circuit

379413, 379399, H04M 1900

Patent

active

055197752

ABSTRACT:
A protection device, for a telephone (or other load) 27 in series with an external protection transistor 2, includes a sensor 6 for detecting common-mode current into the load. The output of the sensor 6 is connected to affect a current source/sink combination, and imbalance in this source/sink combination produces a voltage shift which is indirectly connected to control the protection transistor.

REFERENCES:
patent: 4897872 (1990-01-01), Siligoni et al.
patent: 5029201 (1991-07-01), Bindels
Patent Abstracts of Japan, vol. 10, No. 325 (E-451) (2381), published Nov. 6, 1986, relating to Japanese Published Patent Application No. JP-A-61131663, Hitachi Limited, Jun. 6, 1986.
Patent Abstracts of Japan, vol. 9, No. 81 (E-307) (1804), published Apr. 10, 1985, relating to Japanese Application JP-A-59212067, Nippon D.D.K., Nov. 30, 1984.

Affiliated with

Also associated with

Rating

Device for electrical and/or electronic telephone circuits, desi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for electrical and/or electronic telephone circuits, desi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for electrical and/or electronic telephone circuits, desi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2045611