Circuit arrangement for powering at least one load
AssigneeU.S. Philips Corporation
InventorsGunter Weinfurtner, Werner Jungreitmeier
Life of this patent
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Abstract
A voltage control system for powering at least one remote load from a local power supply. A voltage control circuit coupled to the power supply produces a supply voltage which is transmitted to the load and is selectively set to any of a plurality of levels. A comparator at the load supplies back to the voltage control circuit an identification signal of a given type when the supply voltage is below a reference voltage level which can safely be applied to the load. The identification signal causes the voltage control circuit to change the supply voltage to a value which exceeds the reference voltage level but does not subject the load to overvoltage.
Claims5
A voltage control system for powering a remote load from a local power supply via a transmission line, said voltage control system comprising:
- a voltage control circuit coupled to said power supply for deriving therefrom a load supply voltage which is selectively set to any of a plurality of predetermined values, and transmitting said supply voltage to said load via said transmission line;
- and
- comparator means coupled to said load for transmitting back to said voltage control circuit via said transmission line an identification signal of a predetermined type if the voltage supplied to said load is below a predetermined reference level;
- said voltage control circuit being responsive to said identification signal to change said supply voltage to a value which at least exceeds said reference level but does not subject the load to overvoltage.
Dependencies are inferred from the claim text.