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Hamilton Billy Harold, Meszar John Robert, Ostapiak Roman, Schroeder Robert Edward, Untamo Peter Pentti: Serially-connected converters having multiple regulation modes for use in supplying serially-connected loads on long lines. Bell Telephone Laboratories Incorporated, Wisner Wilford L, June 18, 1974: US3818307 (37 worldwide citation)

These serially connected converters have multiple regulation modes including a new normal mode in which the current-versus-voltage characteristic has a substantial negative slope. This mode produces better load sharing among the serially connected converters than would a constant-current mode of ope ...


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Magalhaes Frank M, Ostapiak Roman, Walk Ralph, Ziesse Norman G: Zero voltage switching half bridge resonant converter.. American Telephone & Telegraph, November 29, 1989: EP0343855-A2 (14 worldwide citation)

A DC to DC converter combines a half-bridge inverter (211-213, 221-223) with a resonant rectifier (237, 241, 242) through a series LC circuit (226, 227) which conducts power at substantially a single frequency. Energy stored in the parasitic capacitors (213, 223) of the two power switches (211, 221) ...


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Bishop John D, Mischenko Paul, Ostapiak Roman: Dc to DC converter including switching device having its on and off times independently controlled by the line and load voltages, respectively. Bell Telephone Laboratories Incorporated, June 29, 1971: US3590361 (13 worldwide citation)

The duty cycle of the switching transistor in a DC to DC converter is controlled by an astable multivibrator whose alternate switching states are respectively responsive to the line and load voltages. Feedback of the output voltage to control the duration of one state of the multivibrator is obtaine ...


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Ostapiak Roman, Scuderi Rudolph: Pulse width stabilized blocking oscillator. Bell Telephone Laboratories Incorporated, Steinmetz, May 21, 1974: US3812435 (1 worldwide citation)

A blocking oscillator includes a pulse width control circuit which diverts base current from the base drive of the blocking oscillator transistor. This permits the blocking oscillator transistor to turn off and establish a predetermined pulse width independently of its .beta. characteristic and the ...


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Magalhaes Frank M, Ostapiak Roman, Walk Ralph, Ziesse Norman G: Convertisseur de commutation resonant en demi-pont, Zero voltage switching half bridge resonant converter. American Telephone And Telegraph Company, KIRBY EADES GALE BAKER, May 19, 1992: CA1301245 (1 worldwide citation)

ZERO VOLTAGE SWITCHING HALF BRIDGE RESONANT CONVERTER AbstractA DC to DC converter combines a half-bridge inverter with a resonantrectifier through a series LC circuit which conducts power at substantially a singlefrequency. Energy stored in the parasitic capacitors of the two power switches aretran ...


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Michelet Robert W, Ostapiak Roman, Scuderi Rudolph: Circuit limiteur de courant dappel avec retour a la fonction initiale lors dune tension dentree affaiblie, Inrush current limit circuit with reset response to lowered input voltage. Western Electric Company Incorporated, April 3, 1979: CA1051978

INRUSH CURRENT LIMIT CIRCUIT WITH RESET RESPONSE TO LOWERED INPUT VOLTAGE Abstract of the Disclosure A converter circuit includes an inrush currentlimit circuit to limit the initial transient surge ofinrush current to a power supply upon the initial applicationof voltage to the power supply input. A ...


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