G - Physics – 05 – F
Patent
G - Physics
05
F
G05F 1/56 (2006.01) G05F 1/46 (2006.01) G05F 1/565 (2006.01) G05F 1/575 (2006.01) G05F 3/22 (2006.01)
Patent
CA 2374934
A power supply device has a soft starting circuit 12, which is composed of a transistor Tr9 having its emitter connected to the emitter of a transistor Tr1 of which the base serves as a non-inverting input terminal of a comparator 11 and having its collector grounded, a clamp circuit 10 connected between the base of the transistor Tr1 and the base of the transistor Tr9, a constant-current source 7 receiving a supply voltage Vcc through a switch 2, a capacitor Cs having one end connected to the base of the transistor Tr9 and having the other end grounded, a switch 9 connected to the capacitor Cs, having its contact "c" connected to the constant-current source 7, and having its contact "d" connected to a discharge circuit 8, and the discharge circuit 8.
Cette invention se rapporte à une source d'alimentation comportant un circuit de mise sous tension sans appel de courant (12), comprenant un transistor (Tr9) dont l'émetteur est connecté à l'émetteur d'un transistor (Tr1) dont la base agit comme entrée en phase positive d'un comparateur (11) et dont le collecteur est relié à la terre, un circuit de calage (10) connecté entre la base du transistor (TR1) et la base du transistor (Tr9), une source de courant constant (7) à laquelle une tension de source d'alimentation (Vcc) est appliquée via un commutateur (2), un condensateur (Cs) dont une borne est connectée à la base du transistor (Tr9) et dont l'autre borne est reliée à la terre, un commutateur (9) connecté au condensateur (Cs) tandis que l'une de ses bornes (c) est connectée à la source de courant constant (7) et l'autre est connectée à un circuit de décharge (8), et le circuit de décharge (8).
Hiramatsu Yoshihisa
Hojo Yoshiyuki
Rohm Co. Ltd.
Smart & Biggar
LandOfFree
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