Telephone line circuit

Details Telephone line circuit Telephone line circuit

H - Electricity

04

M

379/63

H04M 19/00 (2006.01)

Patent

CA 1114972

TELEPHONE LINE CIRCUIT Abstract of the Disclosure A telephone line circuit for supplying energizing current to a telephone line and for providing a voice frequency connection between the telephone line and an associated switching facility includes a transformer having a split primary winding consisting of n turns for connection across the telephone line and for connection to a power supply or battery. A first current flows in the split primary winding in proportion to the telephone line load characteristic. A balance winding in the transformer is connected in series with one portion of the split primary winding. The balance winding is counter-wound relative to the split primary winding and consists of more than n turns. A circuit including a current regulator causes sufficient balance current to flow in the balance winding to substantially cancel the d-c flux associated with direct current in the split primary winding. The first and balance currents additively combine to produce the energizing current for the telephone line, whereby the load on the power supply is no greater than that of a conventional line circuit in spite of the balance current requirement. - i -

326001

Affiliated with

Also associated with

Rating

Telephone line circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone line circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone line circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1067356