JPS5534731A - Automatic voltage switching circuit - Google Patents
Automatic voltage switching circuitInfo
- Publication number
- JPS5534731A JPS5534731A JP10723678A JP10723678A JPS5534731A JP S5534731 A JPS5534731 A JP S5534731A JP 10723678 A JP10723678 A JP 10723678A JP 10723678 A JP10723678 A JP 10723678A JP S5534731 A JPS5534731 A JP S5534731A
- Authority
- JP
- Japan
- Prior art keywords
- load
- voltages
- voltage
- resistance
- switching
- 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
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To make it possible to supply a prescribed voltage to a load without switching operation independently of the level of an input voltage by detecting reference voltages for various input voltages and load both-end voltages and comparing them with each other to control a switching transistor.
CONSTITUTION: Switching transistor Tr3 is inserted in series between load 1 and power source part 2. Switch circuit 4 generates fixed reference voltages for various input voltages by Zener diode 11, capacitor 10 and resistance 9; and meanwhile, both-end voltages of load 1 are detected by resistance 21 and output voltage rectification resistance 18, and these voltages are compared with reference voltages to control turning-on and off of switching Tr3, and the output of power source part 2 is supplied to load 1, thereby making the applied voltage of load 1 fixed independently of the input voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10723678A JPS5534731A (en) | 1978-08-31 | 1978-08-31 | Automatic voltage switching circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10723678A JPS5534731A (en) | 1978-08-31 | 1978-08-31 | Automatic voltage switching circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5534731A true JPS5534731A (en) | 1980-03-11 |
Family
ID=14453927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10723678A Pending JPS5534731A (en) | 1978-08-31 | 1978-08-31 | Automatic voltage switching circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5534731A (en) |
-
1978
- 1978-08-31 JP JP10723678A patent/JPS5534731A/en active Pending
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