JPS5510695A - Constant-power circuit - Google Patents
Constant-power circuitInfo
- Publication number
- JPS5510695A JPS5510695A JP2790279A JP2790279A JPS5510695A JP S5510695 A JPS5510695 A JP S5510695A JP 2790279 A JP2790279 A JP 2790279A JP 2790279 A JP2790279 A JP 2790279A JP S5510695 A JPS5510695 A JP S5510695A
- Authority
- JP
- Japan
- Prior art keywords
- transistors
- constant
- current
- collector
- base
- 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
Abstract
PURPOSE: To make low-voltage operation possible and also to obtain a sufficient output current by connecting in common the base of the 1st transistor supplying a constant output and that of the 2nd transistor controlling a collector current to a constant value in a constant power circuit.
CONSTITUTION: The common collector-base points of transistors Q11 and Q12 constituting the 1st and 2nd voltage generating methods are connected to bases of a differential couple of transistors Q13 and Q14 detecting a difference in potential between both the methods, and also to collectors of transistors Q15 and Q16 constituting the 1st and 2nd current control methods. Since collector-emitter voltages of Q11, Q12, Q15, and Q16 are all equalized by designing, an accurate output current can be obtained and an influence upon the power voltage disappears. Operating currents of transistors Q13 and Q14 can freely be set by resistance R13, and consequently a large current can be flowed while base currents of Q15, Q16 and Q19 can be absorbed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2790279A JPS5510695A (en) | 1979-03-10 | 1979-03-10 | Constant-power circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2790279A JPS5510695A (en) | 1979-03-10 | 1979-03-10 | Constant-power circuit |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6953278A Division JPS55611A (en) | 1978-06-09 | 1978-06-09 | Constant current circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5510695A true JPS5510695A (en) | 1980-01-25 |
Family
ID=12233808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2790279A Pending JPS5510695A (en) | 1979-03-10 | 1979-03-10 | Constant-power circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5510695A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912780A (en) * | 1972-05-15 | 1974-02-04 | ||
JPS50137456A (en) * | 1974-04-11 | 1975-10-31 | ||
JPS52124845A (en) * | 1976-04-12 | 1977-10-20 | Rca Corp | Bias current attenuator |
-
1979
- 1979-03-10 JP JP2790279A patent/JPS5510695A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912780A (en) * | 1972-05-15 | 1974-02-04 | ||
JPS50137456A (en) * | 1974-04-11 | 1975-10-31 | ||
JPS52124845A (en) * | 1976-04-12 | 1977-10-20 | Rca Corp | Bias current attenuator |
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