Patent
1981-02-17
1982-08-10
Brigance, Gerald L.
179 16F, 179 18FA, H04M 1900
Patent
active
043439713
ABSTRACT:
A circuit for supplying drop current to the subscriber connected to the remote terminal of a central office powered telecommunications system. A switching regulator is included in the circuit for generating the drop current. The switching regulator adjusts its conduction time as a function of the length of the loop connecting the subscriber to the terminal such that the subscriber consumes only that power required by the loop length. The switching regulator operates in response to a reference current generated by a control circuit. A central office supplied signal on the transmission means connecting the central office to the terminal is used for transferring power to the terminal. The amplitude of that signal at the terminal varies with system load. When that amplitude deviates in a predetermined direction from a reference signal of predetermined amplitude the reference current and therefore the drop current to all off hook subscribers is uniformly decreased by an amount which allows the power transferring signal amplitude to be maintained substantially equal to the amplitude of the reference signal.
REFERENCES:
patent: 4140881 (1979-02-01), Clenney
patent: 4143247 (1979-03-01), Yoshitoshi et al.
patent: 4254305 (1981-03-01), Treiber
patent: 4273963 (1981-06-01), Seidel
patent: 4282407 (1981-08-01), Steifel
Brigance Gerald L.
Hollander Roy F.
Reliance Electric Company
Rickin Michael M.
LandOfFree
Subscriber drop circuit for controlling drop current with load a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Subscriber drop circuit for controlling drop current with load a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subscriber drop circuit for controlling drop current with load a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1532422