JPS5580128A - Switching type constant-voltage circuit - Google Patents
Switching type constant-voltage circuitInfo
- Publication number
- JPS5580128A JPS5580128A JP15540678A JP15540678A JPS5580128A JP S5580128 A JPS5580128 A JP S5580128A JP 15540678 A JP15540678 A JP 15540678A JP 15540678 A JP15540678 A JP 15540678A JP S5580128 A JPS5580128 A JP S5580128A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- transistor
- terminal
- bias
- voltage circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To make it possible to operate a transistor immediately when a power switch is turned OFF and then ON soon, by connecting one terminal of the bias resistance of a control transistor to the output terminal of a starting transistor.
CONSTITUTION: One terminal of resistance 21 between base bias resistances 21 and 9 of control transistor Tr7 is connected to the emitter of starting Tr4. Consequently, charging currents flow from the emitter of Tr4 to resistance 9 and capacitor 10 via resistance 21 and Tr4 operates staying nearly cut off to flow a little current, so that a low-power resistance can be used as bias resistance 9. Further, when the power switch is turned OFF and then ON soon, capacitor 10 is instantaneously discharged by way of resistance 21, reverse-current preventive diode 20 and control circuit 12, so that Tr4 can be operated immediately.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15540678A JPS5580128A (en) | 1978-12-13 | 1978-12-13 | Switching type constant-voltage circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15540678A JPS5580128A (en) | 1978-12-13 | 1978-12-13 | Switching type constant-voltage circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5580128A true JPS5580128A (en) | 1980-06-17 |
JPS5624289B2 JPS5624289B2 (en) | 1981-06-05 |
Family
ID=15605274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15540678A Granted JPS5580128A (en) | 1978-12-13 | 1978-12-13 | Switching type constant-voltage circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580128A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5953690U (en) * | 1982-09-30 | 1984-04-09 | 日本電気ホームエレクトロニクス株式会社 | power circuit |
-
1978
- 1978-12-13 JP JP15540678A patent/JPS5580128A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5953690U (en) * | 1982-09-30 | 1984-04-09 | 日本電気ホームエレクトロニクス株式会社 | power circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS5624289B2 (en) | 1981-06-05 |
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