DC to DC converter

Details DC to DC converter DC to DC converter

1987-01-02

1987-10-06

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to selectively provide d.c. of either polarity

323351, H02M 7797

Patent

active

046987371

ABSTRACT:
A circuit is disclosed for establishing a regulated negative voltage at an output which comprises first and second power supply conductors to which are supplied a positive DC operating potential and ground potential respectively, a push-pull driver circuit coupled between the two power supply conductors which is responsive to an applied switching signal for alternately sourcing and sinking current at an output thereof, circuitry coupled to the push-pull driver circuit for clamping the voltage level at the output of the latter to a predetermined value when current is source at the output of the push-pull driver circuit, a first capacitor coupled between the output of the push-pull circuit and a first terminal, a second capacitor coupled between second and third terminals with the second terminal being coupled to the output of the converter circuit and the third terminal being coupled to ground potential, and diode circuitry for alternately providing charging paths for the first and second capacitors between the output of the push-pull driver circuit and ground potential to produce the regulated negative DC voltage as charge is transferred between the first and second capacitors.

REFERENCES:
patent: 3944908 (1976-03-01), Oki
patent: 4281377 (1981-07-01), Evans
patent: 4320447 (1982-03-01), Krauss

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