Current controlled two-state modulation

Details Current controlled two-state modulation Current controlled two-state modulation

1972-02-24

1984-06-26

Pellinen, A. D.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323267, 363 21, G05F 156, H02M 3335

Patent

active

044568720

ABSTRACT:
In a current controlled two-state modulation system having a power switch and a low pass filter, a current sensor provides a current feedback signal representative of the current delivered by the power switch to the low pass filter. The low pass filter also provides a voltage feedback signal that is combined with a reference signal to provide a combined signal. A limiting amplifier amplifies the combined signal for further combination with the current feedback signal to provide a switching signal that is delivered to a circuit characterized by hysteresis. This circuit determines the instant when the power switch is switched so as to maintain the output voltage provided by the low pass filter substantially constant so long as the load current is less than a predetermined limiting value determined by the limiting amplifier and thereafter limits the output current to substantially the predetermined limiting value.

REFERENCES:
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patent: 3388318 (1968-06-01), O'Brien
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patent: 3569818 (1971-03-01), Dahlinger et al.
patent: 3571697 (1971-03-01), Phillips
patent: 3585491 (1971-06-01), Petersen
Froeschle, "Two State Modulation Techniques for Power Systems", Research & Development Technical Report, ECOM-02282-3, Semi-Annual Report, Dec. 1967, 83 pages.
Froeschle, "Two State Modulation Techniques for Power Systems", Research & Development Technical Report, ECOM-02282-3, Semi-Annual Report, Apr. 1968, 83 pages.
Froeschle et al., "Lightweight Automatic Charger/Controller", Power Sources Conference, 1968.
"Basic Electronics," NAVPERS 10087, U.S. Government Printing Office, Washington, (1955), preface and pp. 211-219.
"McGraw-Hill Encyclopedia of Science and Technology," vol. 5, McGraw-Hill Book Company, New York City, New York (1971), pp. 214-215.

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