POWER SOURCE - ROHM CO LTD

Title:

POWER SOURCE

Document Type and Number:

WIPO Patent Application WO/2001/004721

Kind Code:

A1

Abstract:

A power source has a soft start circuit (12) comprising a transistor (Tr9) the emitter of which is connected to the emitter of a transistor (Tr1) whose base serves as a positive-phase input of a comparator (11), and the collector of which is grounded, a clamping circuit (10) connected between the base of the transistor (Tr1) and the base of the transistor (Tr9), a constant-current source (7) to which a power source voltage (Vcc) is applied via a switch (2), a capacitor (Cs) a terminal of which is connected to the base of the transistor (Tr9) and the other of which is grounded, a switch (9) connected to the capacitor (Cs) while a terminal (c) of which is connected to the constant-current source (7) and the other (d) of which is connected to a discharge circuit (8), and the discharge circuit (8).

Inventors:

HOJO YOSHIYUKI (JP)
HIRAMATSU YOSHIHISA (JP)

Application Number:

PCT/JP2000/004576

Publication Date:

January 18, 2001

Filing Date:

July 07, 2000

Export Citation:

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Assignee:

ROHM CO LTD (JP)
HOJO YOSHIYUKI (JP)
HIRAMATSU YOSHIHISA (JP)

International Classes:

G05F1/56; G05F1/46; G05F1/565; G05F1/575; G05F3/22; (IPC1-7): G05F1/56

Foreign References:

JPH10293617A	1998-11-04
JPH06163803A	1994-06-10

Other References: