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US 4,602,322 AGranted
Transistor rectifier
AssigneeHewlett-Packard Company
InventorEdwin B. Merrick
Life of this patent
Estimating the term…
Abstract
A power supply for producing DC voltage with a minimum voltage drop from a source voltage that is either AC or DC in which the emitter-base junction of a transistor is coupled to the source so as to provide base current required to turn the transistor on, an output capacitor is connected in series with the emitter-collector path, and a capacitor and resistor are connected in parallel in the base circuit of the transistor.
Claims1
A power supply, comprising
- a pair of input terminals between which an AC or DC power source may be connected,
- a PNP transistor having electrodes respectively performing as an emitter, a collector and a base, said electrode performing as an emitter being connected to one of said input terminals,
- a first output capacitor connected between said collector and a point of reference potential,
- an NPN transistor having electrodes respectively performing as an emitter, a collector and a base, said latter electrode performing as an emitter being connected to the other of said input terminals,
- a second output capacitor connected between said collector of said NPN transistor and the point of reference potential, and
- a resistor and a capacitor connected in parallel between the base of said PNP transistor and the base of said NPN transistor.
3 more elements
Dependencies are inferred from the claim text.