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US 4,456,833 AGranted
Regulated power supply
AssigneeHewlett-Packard Company
InventorsStefan Traub, Frank Rochlitzer
Life of this patent
Estimating the term…
Abstract
A linear regulated D.C. power supply includes two control elements for regulating two separate unregulated D.C. voltage sources. An enabling means is used to enable the one of the two control elements which is operating at the lower instantaneous power dissipation level and to supply the regulated output of that selected control element to a load.
Claims20
A power supply for supplying a predetermined regulated voltage at a load, said power supply comprising:
- a first input for receiving a first voltage which varies between first maximum and minimum voltage levels around a first nominal voltage level;
- a second input for receiving a second voltage which varies between second maximum and minimum voltage levels around a second nominal voltage level;
- first control means, coupled between the first input and the load, for receiving the first voltage and for presenting a third voltage at the load, the third voltage being substantially equal to the predetermined regulated voltage;
- second control means, coupled between the second input and the load, for receiving the second voltage and for presenting a fourth voltage at the load, the fourth voltage being substantially equal to the predetermined regulated voltage;
- enabling means, coupled to the first and second control means, for selectively enabling one of the control means and for disabling the other control means;
- and
- wherein a ratio of the nominal first voltage level to the nominal second voltage level is substantially equal to one half of a ratio of the maximum first voltage level to the minimum second voltage level.
4 more elements
A power supply for supplying a predetermined regulated voltage at a load, said power supply comprising:
- a first input for receiving a first voltage which varies between first maximum and minimum voltage levels around a first nominal voltage level;
- a second input for receiving a second voltage which varies between second maximum and minimum voltage levels around a second nominal voltage level;
- first control means, coupled between the first input and the load, for receiving the first voltage and for presenting a third voltage at the load, the third voltage being substantially equal to the predetermined regulated voltage;
- second control means, coupled between the second input and the load, for receiving the second voltage and for presenting a fourth voltage at the load, the fourth voltage being substantially equal to the predetermined regulated voltage;
- and
- enabling means, coupled to the first and second control means, for selectively enabling the one of the control means which is operating at a lower power dissipation level than the other control means and for disabling said other control means.
3 more elements
Dependencies are inferred from the claim text.