Current supplementation circuit for power supply

Details Current supplementation circuit for power supply Current supplementation circuit for power supply

1981-12-28

1983-10-04

Pellinen, A. D.

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

179 81R, 323226, 323268, 323317, G05F 320

Patent

active

044081537

ABSTRACT:
A current supplementation circuit is designed to operate in conjunction with a two-terminal telephone line for supplying additional current to the output of a voltage regulator (42). A nonregulated voltage is received at first and second terminals (18, 20) with the nonregulated voltage comprising both DC and AC signals. An essentially regulated voltage is produced at a terminal (12) at the output of the voltage regulator (42). An essentially constant current is drawn from the first terminal (41) and provided to the second terminal (20) to provide an indication that the subscriber circuit is active. This constant current comprises first and second partial currents. The first partial current is passed through a control transistor (98) through a parasitic collector to the second terminal (14). The second partial current is passed through the control transistor (98) to the regulated voltage terminal (12) when the voltage at this terminal drops. The current supplementation circuit serves to bypass the voltage regulator (42) and supply additional current to the voltage regulated node when the voltage at that node drops below its intended level.

REFERENCES:
patent: 4282478 (1981-08-01), Leidich
patent: 4297646 (1981-10-01), LoCascio et al.

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