JPS5547520A - Constant current circuit - Google Patents
Constant current circuitInfo
- Publication number
- JPS5547520A JPS5547520A JP12058078A JP12058078A JPS5547520A JP S5547520 A JPS5547520 A JP S5547520A JP 12058078 A JP12058078 A JP 12058078A JP 12058078 A JP12058078 A JP 12058078A JP S5547520 A JPS5547520 A JP S5547520A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- collector current
- voltage
- current
- collector
- 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.)
- Pending
Links
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
PURPOSE: To make the output current substantially constant irrespective of the pulsation of the voltage by controlling the series transistor in which the resistance is connected between the emitter bases by the transistor which is turned ON at more than a predetermined value of the pulsating voltage.
CONSTITUTION: The pulsating voltage impressed between the input terminals 1, 2 becomes larger than a predetermined value, the period of ON of the transistor 3 is longer, the dropping time width of the collector current of the transistor 10 is lengthened, and the collector current is made substantially constant. When the pulsating voltage exceeds a predetermined limit and becomes larger, the dropping of the collector current becomes much larger, however, the dropping time width is not enlarged, so that the collector current is reduced. In order to correct this reduction, the resistance 12 is provided ans when the voltage between the collector emitters of the transistor 8 is high, the base current is supplied to the transistor 10.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12058078A JPS5547520A (en) | 1978-09-30 | 1978-09-30 | Constant current circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12058078A JPS5547520A (en) | 1978-09-30 | 1978-09-30 | Constant current circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5547520A true JPS5547520A (en) | 1980-04-04 |
Family
ID=14789790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12058078A Pending JPS5547520A (en) | 1978-09-30 | 1978-09-30 | Constant current circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5547520A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9909326B2 (en) | 2010-02-25 | 2018-03-06 | John Clement Preston | Scaffolding |
-
1978
- 1978-09-30 JP JP12058078A patent/JPS5547520A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9909326B2 (en) | 2010-02-25 | 2018-03-06 | John Clement Preston | Scaffolding |
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