JPS5680713A - Alternating-current constant-voltage circuit - Google Patents
Alternating-current constant-voltage circuitInfo
- Publication number
- JPS5680713A JPS5680713A JP15755779A JP15755779A JPS5680713A JP S5680713 A JPS5680713 A JP S5680713A JP 15755779 A JP15755779 A JP 15755779A JP 15755779 A JP15755779 A JP 15755779A JP S5680713 A JPS5680713 A JP S5680713A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- terminals
- terminal
- transistors
- alternating
- 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
- Control Of Electrical Variables (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To obtain a constant AC voltage even if in-use conditions are changed by connecting both terminals of the secondary winding of a transformer between emitters of transistors inserted at the primary side and by comparing its secondary- side voltage with a normal voltage between bases of transistors.
CONSTITUTION: A control circuit is connected in series to the primary winding of transformer TR. Emitters of transistors T1 and T2 of the control circuit are connected to both terminals of the secondary winding of TR and between bases, a reference voltage obtained by dividing the Zener voltage of Zener diode ZD1 (ZD2) by resistance R3 (R4) and variable resistance VR is applied at every half cycle of an AC voltage. With terminal 1 held positive, as the voltage of terminals 3 nears the base voltage of transistor 1, its conduction is limited and the voltage of terminal is also limited. As the voltage of terminal 3 drops, a current flowing through the transistor is increased to increase the voltage applied to the primary winding.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15755779A JPS5680713A (en) | 1979-12-05 | 1979-12-05 | Alternating-current constant-voltage circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15755779A JPS5680713A (en) | 1979-12-05 | 1979-12-05 | Alternating-current constant-voltage circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5680713A true JPS5680713A (en) | 1981-07-02 |
JPH0114606B2 JPH0114606B2 (en) | 1989-03-13 |
Family
ID=15652279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15755779A Granted JPS5680713A (en) | 1979-12-05 | 1979-12-05 | Alternating-current constant-voltage circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5680713A (en) |
-
1979
- 1979-12-05 JP JP15755779A patent/JPS5680713A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0114606B2 (en) | 1989-03-13 |
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