DC Power supply circuit for line interface circuits

Details DC Power supply circuit for line interface circuits DC Power supply circuit for line interface circuits

1984-07-09

1985-12-31

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

323281, 179 70, 179 77, H02M 114, H04M 174

Patent

active

045625255

ABSTRACT:
A circuit for supplying direct current to a line (a, b) from a battery via two supply resistors (RA, RB). Part of the current supplied by the battery flows in a secondary path including a resistor (R4) and a transistor (16), and is maintained at a constant value. A symmetrical and differential resistance bridge connected between the supply resistors and the line detects the transverse alternating current flowing into the battery, and means (15) are provided to cause the transistor to generate a negative-feedback alternating current whose value is adjusted to cancel said transverse alternating current.

REFERENCES:
patent: 4007335 (1977-02-01), Hetherington et al.
patent: 4476350 (1984-10-01), Aull et al.
patent: 4514595 (1985-04-01), Rosenbaum et al.
"Balanced Electronic Receiver for Loop Signaling", D. Fischbuch et al., Electrical Communications, vol. 44, No. 4, 1969, pp. 340-347, London.

Affiliated with

Also associated with

Rating

DC Power supply circuit for line interface circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1027677