Title:
POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO2000048301
Kind Code:
A8
Abstract:
When a voltage is applied between the emitter and collector of a third transistor (Q103) to turn off first and third transistors (Q101, Q103), no voltage drop occurs across a third resistor (R103), and the second and third transistors (Q102, Q103) are turned off. When the first transistor (Q101) is turned on, a voltage drop occurs across the third resistor (R103), thus allowing the second and third transistors (Q102, Q103) to be on. The base current of the third transistor (Q103) is controlled to a minimum that can saturate the third transistor (Q103). When the current between the emitter and collector of the third transistor (Q103) increases, the collector currents of the first to third transistors (Q101-Q103) increases, and the voltage between the emitter and collector of the third transistor (Q103) decreases.
Inventors:
HANEDA MASAJI (JP)
Application Number:
PCT/JP2000/000700
Publication Date:
November 02, 2000
Filing Date:
February 09, 2000
Export Citation:
Assignee:
NTT DATA CORP (JP)
HANEDA MASAJI (JP)
HANEDA MASAJI (JP)
International Classes:
H02M3/335; (IPC1-7): H02M7/217
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