Electric power conversion systems – Current conversion – With voltage multiplication means
Patent
1995-03-28
1996-03-26
Wong, Peter S.
Electric power conversion systems
Current conversion
With voltage multiplication means
327536, 307110, 320 1, H02M 318
Patent
active
055026290
ABSTRACT:
A DC-DC converter includes first and second MOS transistors which selectively connect a first capacitor to a DC power supply so as to charge the first capacitor, and third and fourth MOS transistors which selectively connect the first capacitor to a second capacitor so as to charge the second capacitor by electric charges stored in the first capacitor. A predetermined output voltage is produced at a lead of the second capacitor serving as an output terminal, based on the charge/discharge operations of the first and second capacitors in response to the switching operations of the four MOS transistors. A variable voltage is applied to a back gate of one MOS transistor selected from the first to fourth MOS transistors. When the selected MOS transistor is on, a first control transistor in the converter forms a connection between a source and a back gate of the selected MOS transistor, to reduce the resistance value of the selected MOS transistor when turned on. When the selected MOS transistor is off, a second control transistor in the converter applies a voltage, selected from the predetermined output voltage and the supply voltages of the first and second DC power supplies, to the back gate of the selected MOS transistor. This prevents a parasitic bipolar transistor, inherently formed in the selected MOS transistor, from turning on.
REFERENCES:
patent: 5051881 (1991-09-01), Herold
patent: 5132895 (1992-07-01), Kase
patent: 5159543 (1992-10-01), Yamawaki
patent: 5245524 (1993-09-01), Nakagawa et al.
patent: 5394320 (1995-02-01), Blodgett
Ito Hidenobu
Mizuno Hiroko
Berhane Adolf
Fujitsu Limited
Halsey, Jr. James D.
Wong Peter S.
LandOfFree
DC-DC converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with DC-DC converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC-DC converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-920951