Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1984-06-13
1986-04-22
Beha, Jr., William H.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323224, H02M 3142
Patent
active
045845174
ABSTRACT:
A DC-DC converter includes an inductor having a first terminal connected to a source of DC voltage to be converted. A power transistor is connected to the other terminal of the inductor and controls the passage of current therethrough. A rectifier has an input connected to the inductor and has an output which comprises the output of the converter. A capacitor has a first electrode connected to the output of the rectifier and a second electrode connected to the emitter of the power transistor, the collector of the power transistor being connected to the inductor. A comparator is connected to the power transistor for controlling the operation thereof in accordance with the capacitor voltage so as to produce a desired converter output voltage. The comparator has a first input connected to receive a first reference potential and a second input coupled to the second electrode of the capacitor. The output of the comparator is coupled to the base of the power transistor. A voltage sensing device is coupled between a second reference voltage and (a) the second electrode of the capacitor, (b) the emitter of the power transistor, and (c) the second input of the comparator.
REFERENCES:
patent: 3974439 (1976-08-01), Holland
patent: 4355277 (1982-10-01), Davis et al.
patent: 4514679 (1985-04-01), Schierjott
Beha Jr. William H.
Ingrassia Vincent B.
Motorola Inc.
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