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2010-10-18T18:41:56+01:00
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Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0590764-A1-19940406
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A direct-current stabilizer (5) includes a n-p-n transistor (Tr₃), and a control terminal (CNT₁) to which a control voltage (Vc) for driving the transistor (Tr₃) is applied. The value of the control voltage (Vc) is determined so that a voltage applied to the base of the transistor (Tr₃) is not lower than the sum of the emitter voltage (V₀(V₀₂)) and the base-emitter voltage. With this structure, since the transistor (Tr₃) is driven by the control voltage (Vc) of a value different from that of the input voltage (VIN), it is possible to limit the input voltage (VIN) to a low value, allowing the difference between the input voltage (VIN) and the output voltage (V₀(V₀₂)) to be minimized. Moreover, it is possible to switch the output of the direct-current stabilizer (5) by connecting to the control terminal (CNT₁) a control transistor (Tr₂) for switching the application of the control voltage (Vc) to the control terminal (CNT₁) between on and off. Furthermore, when the control terminal (CNT₁) is connected to the input terminal (VIN), the transistor (Tr₃) is driven by the input voltage (VIN). Therefore, the direct-current stabilizer (5) is used in the same manner as a conventional direct-current stabilizer is used.
A direct-current stabilizer (5) includes a n-p-n transistor (Tr₃), and a control terminal (CNT₁) to which a control voltage (Vc) for driving the transistor (Tr₃) is applied. The value of the control voltage (Vc) is determined so that a voltage applied to the base of the transistor (Tr₃) is not lower than the sum of the emitter voltage (V₀(V₀₂)) and the base-emitter voltage. With this structure, since the transistor (Tr₃) is driven by the control voltage (Vc) of a value different from that of the input voltage (VIN), it is possible to limit the input voltage (VIN) to a low value, allowing the difference between the input voltage (VIN) and the output voltage (V₀(V₀₂)) to be minimized. Moreover, it is possible to switch the output of the direct-current stabilizer (5) by connecting to the control terminal (CNT₁) a control transistor (Tr₂) for switching the application of the control voltage (Vc) to the control terminal (CNT₁) between on and off. Furthermore, when the control terminal (CNT₁) is connected to the input terminal (VIN), the transistor (Tr₃) is driven by the input voltage (VIN). Therefore, the direct-current stabilizer (5) is used in the same manner as a conventional direct-current stabilizer is used.
en
European Patent Office
EP0590764
EP 0590764
G05F 01/56
G05F 01/573
Direct-current stabilizer
Direct-current stabilizer - European Patent Office - EP 0590764 A1
Direct-current stabilizer - European Patent Office - EP 0590764 A1
Adobe PDF Library 8.0
"EP0590764"; "EP 0590764"; "G05F 01/56"; "G05F 01/573"; "Direct-current stabilizer"
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EP
0590764
A1
1994-04-06
93305808
1993-07-22
JP
26206092
1992-09-30
G05F 01/56
G05F 01/573
SHARP KABUSHIKI KAISHA
Matsumura, Tsuneo
Hachimura, Kenji
Suzuki, Tomohiro
White, Martin David
Direct-current stabilizer
Gleichstromstabilisator
Direct-current stabilizer
Stabilisateur à courant continu
A direct-current stabilizer (5) includes a n-p-n transistor (Tr₃), and a control terminal (CNT₁) to which a control voltage (Vc) for driving the transistor (Tr₃) is applied. The value of the control voltage (Vc) is determined so that a voltage applied to the base of the transistor (Tr₃) is not lower than the sum of the emitter voltage (V₀(V₀₂)) and the base-emitter voltage. With this structure, since the transistor (Tr₃) is driven by the control voltage (Vc) of a value different from that of the input voltage (VIN), it is possible to limit the input voltage (VIN) to a low value, allowing the difference between the input voltage (VIN) and the output voltage (V₀(V₀₂)) to be minimized. Moreover, it is possible to switch the output of the direct-current stabilizer (5) by connecting to the control terminal (CNT₁) a control transistor (Tr₂) for switching the application of the control voltage (Vc) to the control terminal (CNT₁) between on and off. Furthermore, when the control terminal (CNT₁) is connected to the input terminal (VIN), the transistor (Tr₃) is driven by the input voltage (VIN). Therefore, the direct-current stabilizer (5) is used in the same manner as a conventional direct-current stabilizer is used.
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